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Publication numberUS3411774 A
Publication typeGrant
Publication dateNov 19, 1968
Filing dateDec 7, 1964
Priority dateDec 7, 1964
Publication numberUS 3411774 A, US 3411774A, US-A-3411774, US3411774 A, US3411774A
InventorsThornton George D
Original AssigneeGeorge D. Thornton
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Oscillation operated elevatable swing
US 3411774 A
Abstract  available in
Images(3)
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Claims  available in
Description  (OCR text may contain errors)

1968 e. D. THORNTON OSCILLATION OPERATED ELEVATABLE SWING 5 Sheets-Sheet 1 Filed Dec. 7, 1964 INVENTOR. Gemye 8 flora/512 BY 1968 G. D. THORNTON OSCILLATION OPERATED ELEVATABLE SWING Filed Dec. 7, 1964 3 Sheets-Sheet 2 I INVENTOR. Gevzye p9. flax/M011 1968 I G. D. THORNTON 3,411,774

OSCILLATION OPERATED ELEVATA'BLE SWING Filed Dec. 7, 1964 5 Sheets-Sheet 5 l N VEN TOR. Geage & flax/rib fiilk/zz United States Patent Otfice 3,411,774 Patented Nov. 19, 1968 3,411,774 OSCILLATION OPERATED ELEVATABLE SWING George D. Thornton, 29179 Longview, Apt. 19, Warren, Mich. 48093 Filed Dec. 7, 1964, Ser. No. 416,492 16 Claims. (Cl. 272-6) ABSTRACT OF THE DISCLOSURE A swing assembly in which a rope or cable has a seat or platform at the lower end thereof, such rope or cable being attached at its upper end to a rotatable pulley. As the seat oscillates back and forth, the pulley is caused to rotate in a winding direction and prevented from rotating in an unwinding direction. At a predetermined point, the clutch means preventing unwinding rotation of the pulley is released, allowing the seat or platform to fall in an unimpeded manner to the fully extended position of the rope or cable.

This invention relates to a swing, and more particularly to a swing which will oscillate, or swing back and forth, beneath a support and at the same time will elevate a predetermined amount and then drop to its extended position.

It is the general practice to construct swing assemblies in such a manner that the swing depends from an overhead support, the swing seat or platform being secured at the end of a single rope or a pair of ropes so that the platform may be oscillated to and fro beneath the support. It is becoming increasingly popular to utilize a tubular support structure which may be easily assembled adn disassembled 'for transportation from place to place, and which may easily be mounted in an area where other suitable supports may not be found.

It is here proposed to provide a swing device which will not only oscillate, or swing back and forth beneath a support, but will also elevate a predetermined distance and then drop back to the extended position, thus providing a different type of ride for the person using the swing. The elevating assembly may be formed of a unit easily mounted over the generally available type of tubular support and locked in place on the support alongside of, or in place of, other swings or the like mounted on the same support. The device includes a pulley structure to which the rope or cable is secured and which is rotated by means of the oscillation of the swing, the pulley being allowed to rotate in a winding direction but prevented from rotating in an unwinding direction to elevate the platform or seat. At a predetermined point, that is, a predetermined amount of elevation of the platform or seat, or a predetermined degree of rotation of the pulley, the pulley is released to freely rotate in the unwinding direction allowing the rope or cable to unwind from the pulley and dropping the seat or platform to the fully extended position. A shock absorbing device is disposed between the rope or cable and the platform to take up the shock of the drop. Thus, it is the swinging action itself which causes the elevating of the platform and the rope or cable actuates the releasing mechanism to permit the unwinding and dropping of the rope or cable and seat. This gives an entirely different type of action than the normal oscillating swing, and an entirely different ride and sensation to the user.

These and other features and advantages of the invention will become more apparent from the following description and drawings in which:

FIGURE 1 is a perspective view of a typical swing support structure with the elevating and dropping swing assemblies mounted thereon.

FIGURE 2 is an elevational view of the pulley mechanism and assembly which causes the swing to elevate and drop.

FIGURE 3 is a side view of the assembly illustrated in FIGURE 2, taken substantially along the line 3-3 of FIGURE 2 and looking in the direction of the arrows, with parts broken away and in section to illustrate the position of the various parts.

FIGURE 4 is a cross-sectional view of the structure illustrated in FIGURES 2 and 3, taken substantially along the line 4-4 of FIGURE 3 and looking in the direction of the arrows.

FIGURE 5 is a partial sectional view of a portion of the assembly illustrated in FIGURES 2 through 4 to illustrate the pulley latching means which permits the winding and unwinding of the rope or cable about the pulley.

FIGURE 6 is a cross-sectional view of the connection between the rope or cable and the platform or seat illustrating the shock absorbing mechanism.

FIGURE 7 is an elevational view similar to FIGURE 2 of another embodiment of the invention.

FIGURE 8 is a cross-sectional view of the embodiment illustrated in FIGURE 7.

FIGURE 9 is a cross-sectional view of the embodiments illustrated in FIGURES 7 and 8, taken substantially along the line 99 of FIGURE 8 and looking in the direction of the arrows.

Referring more particularly to the drawings, FIG- URE 1 best illustrates a typical swing installation in which an overhead support bar 10, which may be generally horizontal, is supported from the ground by means of angularly outwardly directed legs 11. Suitable connecting means 12 secure the overhead support 10 to the legs 11 in such manner that they may be easily assembled or disassembled for movement from place to place. Illustrated generally by the numeral 14 is a swing assembly which, in this instance, encompasses a single rope or cable 16 having a circular platform 18 secured to the lower end. It is to be understood that the member 16 can be any elongated means, as a rope or cable, sufiicient to support the weight of the user. For ease in description, the member 16 is hereinafter referred to as a rope. The rope '16 depends from the elevating and releasing mechanism, illustrated generally by the numeral 20 and which will be hereinafter described in more detail. Swing 14 is such that the user may straddle the rope 16 and sit on the platform or seat 18 to swing to and fro beneath the overhead support bar 10.

Referring next to FIGURES 2 through 5, a preferred embodiment of the invention is more particularly illus trated. Received over the support bar 10 is a mounting sleeve 22 to which is secured the remainder of the assembly. As will become hereinafter more apparent, sleeve 22 is not necessary for the operation of the assembly but is provided in order to permit the mechanism 20 to be manufactured as a complete assembly and more easily mounted on the support bar 10.

Received over the mounting sleeve 22 is a bearing sleeve 24 which is free to rotate on the mounting sleeve 22, or directly on the support bar 10 if the mounting sleeve is not provided. Bearing sleeve 24 has a generally radial aperture 26 formed at one point therethrou-gh for purposes to become hereinafter more apparent.

In order to hold the bearing sleeve 24 in its proper axial position on the mounting sleeve 22, a pair of looking rings 28 are received over the mounting sleeve 22 and bolts 30 extend through the rings 28, the mounting sleeve 22 and the support pipe 10. The entire unit is held in place by suitable nuts 32 received over the threaded ends of bolts 30. Thus, the rings 28 and bolts 30 locate the bearing sleeve 24 relative to the mountin sleeve 22 and also mount the entire assembly on the support bar or pipe 10.

Substantially centrally received on the bearing sleeve 24 is a pulley, illustrated generally by the numeral 34, having an rarcuate outer circumference 36 to receive the rope 16 and about which the rope is wound. Pulley 34 has a central web 38, and an inner hub received on the bearing sleeve 34. The pulley 34 is rotatable relative to the bearing sleeve. Formed through the arcuate outer circumference 36, the web 38 and the hub 40 is a radial passage 42, the purpose for which will be later described. Passage 42 is, in one position of the pulley, aligned with the aperture 26 formed in the bearing sleeve 24.

Rope 16, as best illustrated in FIGURE 3, may be secured in the pulley 34 in any suitable manner, as by passing the end through a suitable aperture 44 in one side wall of the pulley web 38, the rope 16 being bent into engagement with the side surface of the web 38 and secured thereon by :a suitable clip 46. The clip is held in place by machine screws or the like 48. The rope 16 thus is secured to the pulley and as the pulley rotates the rope 16 Will be wound around the arcuate circumferential surface 36 to elevate the platform 18.

Also mounted on bearing sleeve 24 and on opposite sides of the pulley 34 are a pair of plate members, illustrated generally by the numeral 50. Plate members have circular portions 52 received over the bearing sleeve 24 and are rotatable with respect to the bearing sleeve 24. The lower portions 54 of the plate members 50 depend downwardly from the bearing sleeve 24 and below the pulley 34. A pair of connecting pins 56 extend between the lower ends of the portions 54, the pins 56 being surrounded by rollers 58 which also act as spacer members therebetween. Suitable bolts or machine screws 60 secure the assembly together. The rope 16 is passed between the rollers 58 and then hangs downwardly to the platform or seat 18.

In order to secure the pulley 34 and the plate members 50 in their proper axial position on the bearing sleeve 24, a pair of locating rings 62 are provided. Rings 62 are secured to the bearing sleeve by means of set screws or the like 64 and thus properly position the various parts axially of the bearing sleeve 24.

Disposed between the right hand plate member 50 and the locking ring 28 is a spring, illustrated generally by the numeral 66, wound about the bearing sleeve 24 and having an inturned end 68 received in a suitable aperture in the plate member 50. Spring 66 is wound in such a direction around the bearing sleeve 24 that as the plate member moves counterclockwise, as viewed in FIGURE 3, the spring will tighten on the bearing sleeve 24 and cause the bearing sleeve to rotate with the plate member 50. On the opposite side of the pulley 34 is a second spring, illustrated generally by the numeral 70, having an end 72 received in :a suitable aperture in the left hand locking ring 28. Spring is wound in such direction that as the bearing sleeve 24 rotates in a counterclockwise direction to tighten spring 66, spring 70 will tend to unwind, thus loosening from the bearing sleeve 24. As rotation of the bearing sleeve in a clockwise direction is attempted, the spring 70 will tighten about the bearing sleeve 24 and, being fixed to the lock ring 28, will prevent such rotation of the bearing sleeve.

Received in the aperture 42 in the pulley 34 is a latch pin, illustrated generally by the numeral 74. Latch pin 74 extends through the puley 34 and into the aperture 26 formed in the bearing sleeve 24. A suitable collar 76 formed midway of the pin 74 serves as a biasing collar for a compression spring 78, disposed in the aperture 42 and held in place by a threaded bushing 80. The upper portion 82 of lock pin 74 has a transverse aperture 84 formed therethrough, aperture 84 having conical or countersunk ends for purposes to become hereinafter more apparent.

Pivotally mounted in the pulley 34 is a lever, illustrated generally by the numeral 86, mounted on a pivot pin 88 extending between the side walls of the pulley 34. Extending outwardly from the lever 86 is a pin 90 which is received in the aperture 84 formed in the lock pin 74. It will be apparent that as the lever 86 is depressed the pin 90 will cause the latch pin 74 to withdraw from the aperture 26 against the force of the biasing spring 78. Once the latch pin 74 is withdrawn, pulley 34 is free to rotate relative to the bearing sleeve 24. As is now apparent, the countersunk ends of the aperture 84 prevent any binding between the pin 90 and the latch pin 74.

Referring next to FIGURE 6, the shock absorbing mechanism for the seat or platform 18 is best shown. Rope 16 extends downwardly to a tubular member 92 and is secured to the tubular member 92 in any convenient manner, as set screws 94. Tubular member 92 is slidably disposed within a pipe or conduit 96, the conduit having a threaded lower end 98 to receive lock nuts 100 disposed on opposite sides of the seat or platform 18. Thus, the conduit 96 is rigidly secured to the platform. The upper end of pipe or conduit 96 is provided with a cap 102, secured to the pipe or conduit 96 in any suitable manner and having a central aperture 104 to permit passage of the rope or cable 16 therethrough. An inner plug 106 is also secured in the end of pipe 96 and a compression spring 108 is disposed between the tubular member 92 and the plug 106. It will be apparent that spring 108 is the connection between the rope or cable 16 and the platform 18. As the platform 18 reaches the extended position, when it is falling, the spring 108 will take up the shock of the users weight.

The operation of the embodiment illustrated in FIG- URES 2 through 6 will now be explained. Assuming that the rope 16 is hanging from the pulley 34 and the latch pin 74 is engaged in the aperture 26 in the bearing sleeve 24, the user may start the swing in its oscillating motion beneath the support 10. As the swing moves to the right, as viewed in FIGURE 3, the rope 16 will engage the right hand roller 58 and cause the plate members 50 to rotate in a counterclockwise direction. The spring 66 tightens around the bearing sleeve 24 and the spring 70 relaxes to cause the bearing sleeve to rotate in a counterclockwise direction to a certain amount. As the swing starts to move toward the left, as viewed in FIGURE 3, the rope 16 will engage the left hand roller 58, causing the plate members to return and pass beyond the vertical, rotating in a clockwise direction. With this rotation the spring 66 relaxes on the bearing sleeve 24, the spring 70 tightens on the bearing sleeve 24, and the bearing sleeve is prevented from rotating along with the plate members 50. The rope 16 again swings toward the right and again causes rotation of the plate members 50 in a counterclockwise direction. The springs 66 and 70 permit the bearing sleeve 24 and the pulley 34 to rotate another increment in a counterclockwise direction, thus winding the rope 16 around the outer circumference of the pulley. This motion continues until the lever 86 has advanced around the support 10 with the pulley 34 to a position in engagement with the rope 16, such as is shown in dashed and dotted lines in FIGURE 3. At this point, further rotation of the bearing sleeve 24 and pulley 34 cause the lever 86 to be depressed beneath the rope 16, releasing the latch pin 74 from its engagement with the bearing sleeve 24. When this happens, the pulley 34 is free to rotate relative to the bearing sleeve 24 and the platform 18 will drop rapidly due to the weight of the user. Thus, the pulley 34 will rotate relative to the bearing sleeve 24 and the rope 16 will unwind. Once the oscillating motion is again started, the bearing sleeve 24 is rotated about the support 10 until the aperture 26 lines up with the passage 42 and the latch pin 74 can again engage the bearing sleeve 24. Continued oscillation of the rope 16 will again wind the rope or cable around the pulley 34 for another elevation and dropping of the seat or platform 18.

Referring now to FIGURES 7 through 9, another modification of the abovedescribed construction is shown, and wherein like parts are indicated by like reference numerals.

The mounting or supporting sleeve 22 is secured to the support pipe by means of bolts and nuts -32. Mounted on the support sleeve 22 is a bearing sleeve 110, the outward ends of 112 and 114 being provided with -a suitable polygonal shape, such as the hexagon shown in FIGURE 9. Pulley 34, with its latch pin 74, is mounted on the bearing sleeve 110, the latch pin 74 being adapted to engage a suitable aperture 116 in the bearing sleeve 110. The pulley 34 is rotatable relative to the bearing sleeve in the manner above-described.

Mounted on the hexagonal portion 112 of bearing sleeve 110, and adjacent the hub 40 of pulley 34, is a ratchet gear, illustrated generally by the numeral 118. Ratchet 118 includes a hub portion 120 having an inner configuration to suitably secure the ratchet 118 on the portion 112. Such suitable configuration may be the twelve point structure shown in FIGURE 9 and indicated by the numeral 122. Extending radially outwardly from the hub 120* of the ratchet 118 are a plurality of teeth 124. Mounted on the hub 120 and straddling the teeth 124 is a plate assembly, illustrated generally by the numeral 126. Plate assembly 126 includes side members 128 separated by spacer pins 130, the plate members 128 extending downwardly beneath the pulley 34. Disposed on a suitable pivot pin 132 mounted between the plate members 128 is a pawl 134 having teeth engageable with teeth 124 on the ratchet gear 118. Also mounted between the plate members 128 is a spring 136 to engage the pawl 134 and bias the pawl into engagement with the teeth 124 on the ratchet gear 118. The tooth construction on both the ratchet and pawl are such that the pawl will engage and pull the ratchet 118 in one direction of rotation of the plate assembly 126 and will disengage from the ratchet when the plate assembly 126 is rotated in the opposite direction.

Disposed on the opposite side of pulley 34 from the plate assembly 126 is a plate member 138, received upon and being relatively rotatable with respect to the bearing sleeve 110. Plate member 138 extends downwardly beneath the pulley 34 and is connected to the plate assembly 126 by means of a pair of central pins 56 and roller spacers 58 as above-described. A suitable bolt 140 may be used to secure the parts together. The rope 16 extends between the two rollers in the manner above-described and is secured to the pulley 34 by means of the clip 46 and screws or the like 48.

On the hexagonal section 114 of the bearing sleeve 110 is disposed a second ratchet gear, illustrated generally by the numeral 142. Ratchet 142 includes a hub 144 formed in similar manner to the ratchet 118 and outwardly directed teeth 14-6. A pair of plates 148, separated by spacer pins 150, are mounted on the hub 144 and straddling the teeth 146.

In order to properly locate the bearing sleeve 110 and the remainder of the assembly on the supporting sleeve 22, a pair of locking rings 152 are secured to the supporting sleeve 22 by suitable set screws or the like 154. Spacer ring 155 may be mounted between the right hand lock ring 152 and the ratchet gear 118, or elsewhere, as desired. Mounted on the left hand locking ring 152, as viewed in FIGURE 8, is a bracket 156 secured to the ring in any suitable manner as by bolt 158. Bracket 156 includes outwardly directed flanges 160 which enclose the plates 148 straddling the teeth 146 on the ratchet gear 142. The flanges 160 serve to maintain the plates 148 in the orientation pictured in the drawings for purposes to become hereinafter more apparent. A suitable pawl 162 is mounted between the plates 148 and biased into engagement with the teeth 146 by a spring 164. The tooth construction is such that the pawl will be engaged with the teeth 146 in one direction of rotation and will be disengaged from the teeth in another direction of rotation.

The operation of the embodiment illustrated in FIG- URES 7 through 9 will now be described. As the rope 16 is swung to and fro beneath the pulley 34 and the support 10, and with the latch pin 74 properly engaged in the aperture 116 in the bearing sleeve 110, movement to the right, as viewed in FIGURE 9, of the rope 16 will cause the pawl 134 to engage the ratchet gear 118 and rotate the bearing sleeve 110 and pulley 34 in a counterclockwise direction, again as viewed in FIGURE 9. This, of course, causes an increment of the rope 16 to wind around the rotating pulley 34. As the rope 16 swings in the opposite direction, the pawl 134 will disengage from the teeth 124 of ratchet 118, permitting the plate assembly 126 to move with the rope 16, and the pawl 162 on the opposite side of pulley 34 will engage the teeth 146 on the ratchet 142. Thus, the bearing sleeve will be prevented from rotating in a clockwise direction as the rope 16 swings to the left of the vertical of FIGURE 9. Again, movement toward the right of rope 16 will cause the pawl 134 to engage the teeth 124 of ratchet 118 and will cause the pawl 162 to disengage from the ratchet teeth 146. Movement or rotation of the bearing sleeve 110 and the pulley 34 in a winding or counterclockwise direction will occur thus elevating the platform or seat 18. Such motion will continue until the lever 86 is depressed, as abovedescribed, and the pin 74 is disengaged from the bearing sleeve 110. The pulley then swings freely and unwinds the rope 16 to drop the seat 18. Continued movement of the swing will eventually reengage the latch pin 74 with the beating sleeve 110 to elevate the swing 18.

Thus, a swing structure is provided which creates a sensation or an action which is completely new in the art of swings. The structure is easily manufactured and assembled and may be easily adapted to existing swing support structures. Certain modifications and changes will become apparent to those having skill in the art after having had reference to the foregoing description and drawings. However, it is not intended to limit the scope of the invention by the foregoing description and drawings, but by the scope of the appended claims in which:

I claim:

1. A swing structure comprising:

a support;

a pulley rotatably mounted on said support;

elongated means secured to said pulley and hanging for oscillating movement therefrom, first means being operable to rotate said pulley in one direction in response to oscillation of said elongated means;

a platform secured to the lower end of said elongated means; second means operatively connected to said pulley to permit rotation only in said one direction, and third means operatively connected to said pulley whereby said second means is releasable in response to a predetermined degree of rotation of said pulley in said one direction to permit unimpeded rotation' of said pulley in the other direction to unwind said elongated means from said pulley and permit said platform to fall to an extended position.

2. A swing structure comprising:

a support;

a pulley rotatably mounted on said support;

elongated means secured to said pulley and hanging for oscillating movement therefrom and having a seat on the lower end thereof, means to incrementally rotate said pulley and wind said elongated means around said pulley and raise said seat as said pulley is rotated in one direction by oscillation of said elongated means;

means operatively connected to said pulley to permit rotation thereof in only said one direction;

and releasing means on said pulley to permit unimpeded rotation in the other direction in response to a predetermined degree of rotation of said pulley to permit said elongated means to unwind therefrom and said seat to fall to the fully extended position.

3. A swing structure comprising:

a support;

a pulley rotatably mounted on said support;

elongated means secured to said pulley and hanging for oscillating movement therefrom;

a platform secured to the lower end of said elongated means;

first means operatively connected to said pulley and to said elongated means and operable by said elongated means to cause winding rotation of said pulley by oscillation of said elongated means;

second means operatively connected to said pulley to prevent unwinding rotation thereof while the pulley is being wound by oscillation of said elongated means;

and releasing means on said pulley to permit unimpeded unwinding rotation of said pulley when said pulley has rotated windingly a predetermined amount and to permit said elongated means to unwind from said pulley and allow said platform to fall to an extended position.

4. A swing structure comprising:

a support;

a pulley rotatably mounted on said support;

elongated means secured to said pulley and hanging for oscillating movement therefrom;

plate means rotatably secured to said support adjacent said pulley and having means thereon engaging said elongated means beneath said pulley, said plate means being rotatable by oscillation of said elongated means;

first means on said support and operatively connected to said plate means and said pulley to rotate said pulley in a winding direction with rotation of said plate means in a winding direction by oscillation of i said elongated means;

second means on said support to prevent rotation of said pulley in an unwinding direction when said plate means is rotated in an unwinding direction by the oscillation of said elongated means;

and releasing means on said pulley to permit unimpeded unwinding rotation of said pulley when said pulley has rotated in a winding direction a predetermined amount to permit said elongated means to unwind from said pulley.

5. A swing assembly adapted to be mounted on a support and comprising:

a sleeve receivable on said support and being rotatable relative thereto;

a pulley mounted on said sleeve and being rotatable relative thereto;

latch means on said pulley and engageable with said sleeve for rotation of said pulley with said sleeve;

elongated means secured to said pulley and extending therefrom and adaptable for oscillating movement beneath said pulley, said elongated means having a platform at the lower end thereof;

plate means mounted on said sleeve and being rotatable relative thereto and engaging said elongated means, said plate means being rotated by oscillation of said elongated means;

first means engaging said sleeve and said plate means to cause rotation of said sleeve and rotation of said pulley when said plate means is rotated in a winding direction and when said latch means is engaged to thereby wind said elongated means onto said pulley;

second means engaging said sleeve and preventing rotation of said sleeve and said pulley when said plate means is rotated in an unwinding direction and when said latch means is engaged;

and said latch means being releasable to permit rotation of said pulley in an unwinding direction to permit unwinding of said elongated means therefrom and the return of said platform to an extended position.

6. The swing assembly set forth in claim 5 wherein said first means includes a spring wound around said sleeve and secured at one end to said plate means, said spring being wound in a direction to tighten around said sleeve and lock said sleeve for rotation with said plate means when said plate means is rotated in a winding direction and to disengage from said sleeve when said plate means is rotated in an unwinding direction.

7. The swing assembly set forth in claim 6 wherein said second means includes a spring wound around said sleeve and secured at one end to said support, said spring being wound in a direction to disengage from said sleeve when said sleeve is rotated in a winding direction and to tighten around said sleeve and prevent rotation thereof when said plate means is rotated in an unwinding direction.

8. The swing assembly set forth in claim 5 wherein said first means includes a ratchet mounted on said sleeve and a movable pawl mounted on said plate means and engageable with said ratchet, said pawl being in engagement with said ratchet when said plate means is rotated in a winding direction to rotate said sleeve, and said pawl being disengaged from said ratchet when said plate means is rotated in an unwinding direction.

9. The swing assembly set forth in claim 8 wherein said second means includes a ratchet mounted on said sleeve and a movable pawl mounted on said support and engageable with said ratchet, said pawl being disengaged from said ratchet when said sleeve is rotated in a Winding direction, and said pawl being engageable with said ratchet when said plate means is rotated in an unwinding direction to prevent rotation of said sleeve in the unwinding direction.

10. The swing assembly set forth in claim 5 wherein said sleeve has an aperture formed therein adjacent said pulley, and said latch means includes a pin slidably mounted in said pulley, spring means biasing said pin into said aperture in said sleeve to prevent relative rotation between said pulley and said sleeve, and a lever pivotally mounted on said pulley and operatively engaging said pin, said lever being actuatable by said elongated means to withdraw said pin from said aperture and permit relative rotation between said pulley and said sleeve.

11. The swing assembly set forth in claim 5 and further including a spring secured to said elongated means at one end and secured to said platform at the other end to take up the shock of said platform falling to said extended position.

12. A swing assembly adapted to be mounted on a support and comprising:

a sleeve receivable on said support and rotatable relative thereto, said sleeve having an aperture through one wall thereof;

a pulley mounted on said sleeve and rotatable relative thereto, said pulley having a generally radial opening therein communicating with said aperture in said sleeve;

a latch pin in said opening in said pulley;

resilient means urging said latch pin into said aperture in said sleeve to prevent relative rotation between said pulley and said sleeve;

lever means pivotally mounted on said pulley and engaging said latch pin, said lever means being operable to withdraw said latch pin from said aperture in said sleeve to permit relative rotation between said pulley and said sleeve;

elongated means secured to said pulley and hanging therefrom, said elongated means being adapted to wrap around said pulley when said pulley is rotated in a winding direction;

a platform on the end of said elongated means, said platform and said elongated means being adapted to swing back and forth beneath said pulley;

plate member rotatably mounted on said sleeve and engaging said elongated means below said pulley and movable in winding and unwinding directions with movement of said elongated means;

means operatively connected to said plate member and said sleeve and adapted to be secured to said support to permit rotation of said sleeve and said pulley when said plate member is rotated in a winding direction and to prevent rotation of said sleeve and said pulley when said plate member is rotated in an unwinding direction, whereby said elongated means will be wound around said pulley and said platform will be elevated;

said lever means being actuatable by said elongated means when said pulley has been rotated a predetermined amount to withdrawn said latch pin and allow rotation of said pulley relative to said sleeve and permit said elongated means and said platform to fall to a fully extended position.

13. The swing assembly set forth in claim 12 wherein said means operatively connected to said plate member and said sleeve and adapted to be secured to said support includes:

a first coil spring wound around said sleeve and secured at one end to said plate member, said spring 'being wound in a direction to tighten around said sleeve when said plate member is rotated in a winding direction and lock said sleeve to said plate member, said spring loosening from said sleeve when said plate member is rotated in an unwinding direction;

and a second coil spring wound around said sleeve and having one end securable to said support, said second spring being wound in a direction to loosen from said sleeve when said plate member and said sleeve are rotated in a winding direction, said second spring tightening around said sleeve when said plate member is rotated in an unwinding direction.

14. The swing assembly set forth in claim 13 and further including a spring secured at one end to said elongated means and at the other end to said platform to take up the shock of said platform reaching the extended position.

15. The swing assembly set forth in claim 12 wherein said means operatively connected to said plate member and said sleeve and adapted to be secured to said support includes:

a first ratchet gear secured to said sleeve;

a first pawl engageable and disengageable with said first ratchet gear and pivotally mounted on said plate member, said first pawl being engageable when said plate member is rotated in a winding direction and disengageable when said plate member is rotated in an unwinding direction;

a second ratchet gear secured to said sleeve;

bracket means adapted to be fixed relative to said support;

and a second pawl engageable and disengagea-ble with said second ratchet gear and pivotally mounted on said bracket means, said second pawl being disengaged when said plate member is rotated in a winding direction and engaged when saidtplate member is rotated in an unwinding direction.

16. The swing assembly set forth in claim 15 and further including a spring secured at one end to said elongated means and at the other end to said platform to take up the shock of said platform reaching the extended position.

References Cited UNITED STATES PATENTS 461,541 10/1891 Bunker 272-86 842,635 1/1907 Dodson 272-86 1,991,459 2/1935 Heimers 272.-1 2,197,600 4/1940 Wimer 272-61 X 3,207,508 9/1965 Klemke 272 ANTON O. OECHSLE, Primary Examiner.

ARNOLD W. KRAMER, Assistant Examiner.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
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Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3901504 *Jul 22, 1974Aug 26, 1975Kell Wesley FrancisSee-saw swing apparatus
US4296923 *Oct 11, 1979Oct 27, 1981Miracle Recreation Equipment CompanyPlayground swing
US5342245 *Jul 27, 1992Aug 30, 1994Webb Jr Ted JBouncing swing
US5624321 *Dec 23, 1994Apr 29, 1997Snyder; Stephen D.Spring-actuated swing device
US6123480 *Jun 13, 1997Sep 26, 2000Little Tikes Commerical Play Systems, Inc.Anti-wrap device for swing set
US6669394 *Jul 12, 2002Dec 30, 2003Hedstrom CorporationSwing attachment
US7247078Oct 24, 2003Jul 24, 2007Mattel, Inc.Rotatable entertainment device
US7918710Jun 27, 2007Apr 5, 2011Mattel, Inc.Rotatable entertainment device
Classifications
U.S. Classification472/50, 472/118
International ClassificationA63G9/06, A63G9/00
Cooperative ClassificationA63G9/06
European ClassificationA63G9/06