US 3709467 A
Mobile living facilities and other covered space structures are equipped with self contained adjustable support assemblies to support them above and lower them to ground, and to raise them above and lower them down on the receiving structure of a vehicle. Three self contained adjustable support assemblies are capable of supporting the mobile living facilities when secured to these facilities and resting on the ground.
Description (OCR text may contain errors)
United States Patent [1 1 Mann [ 51 Jan." 9, 1973  SELF CONTAINED ADJUSTABLE SUPPORT ASSEMBLIES TO SUPPORT, RAISE, AND LOWER A MOBILE LIVING FACILITY WITH RESPECT TO BOTH A VEHICLE AND THE GROUND Inventor: James F. Mann, Tacoma, Wash. Filed: Nov. 27, 1970 Appl. No.: 93,295
US. Cl ..254/45, 214/515 Int. Cl. ..B66f 7/26 Field of Search ..254/45, 86 H; 214/515;
 References Cited UNITED STATES PATENTS 9/1966 Hand ..254/45 2/1961 Zich et al. ..248/354 P 6/1930 Berner ..248/354 P UX Primary Examiner-Othell M. Simpson Attorney-Roy E. Mattern, Jr.
57 ABSTRACT Mobile living facilities and other covered space structures are equipped with self contained adjustable support assemblies to support them above and lower them to ground, and to raise them above and lower them down on the receiving structure of a vehicle. Three self contained adjustable support assemblies are capable, of supporting the mobile living facilities when secured to these facilities and resting on the ground.
Each support assembly has a supporting leg, an immediate leg surrounding guide sleeve secured to the mobile living facilities, and adjustable interlocks to secure supporting legs to the respective leg surrounding sleeves at selective variable effective leg lengths between the surrounding guide sleeve and the ground. Adjustments of the effective leg lengths are made by utilizing a self contained hydraulic jack that is removably positioned between each respective supporting leg and its corresponding surrounding guide sleeve. The jacking device is secured below to selective multiple receiving structures on the supporting leg and secured above to a receiving structure on the leg surrounding sleeve.
' Before jacking, and with the jacking device in place,
the respective adjustable interlock is withdrawn for the duration of the jacking movement. Subsequently,
it is reset to thereafter transmit the lifting load independently of thejacking device. The travel of each raising or lowering motion corresponds to the travel of the removable jacking device.
One jacking device is moved about, during each overall height changing operation, to be used with the respective several support assemblies. Generally, four support assemblies are used and at least three are at all times secured by interlocks and. are capable of fully supporting the mobile living facilities while the jacking unit is being used to adjust the height of thefourth support assembly.
4 Claims, 7 Drawing Figures PATENTEUJAN 9191a SHEET 1 [IF 2 INVENTOR L/Am s r. MANN ATTORNEY PATENTEU JAN 9 I975 SHEET 2 [1F 2 W45 INVENTOR M44455 A MAN/V 5 l w M E W06 8 m ATTORNEY SELF CONTAINED ADJUSTABLE SUPPORT ASSEMBLIES TO SUPPORT, RAISE, AND LOWER A MOBILE LIVING FACILITY WITH RESPECT TO BOTH A VEHICLE AND THE GROUND BACKGROUND OF INVENTION are arranged to combine mechanical adjustable height supports with removable self 7 contained hydraulic height adjusting units to completely raise and lower the camper with respect to both the pickup and ground.
SUMMARY OF INVENTION Several self contained adjustable support assemblies, support covered space structures, often having living facilitiescalled campers, when they are not in use and while they are raised and lowered on to a vehicle, which is generally a pickup truck. At least three adjustable support assemblies mechanically and structurally support the camper at any one time while a fourth adjustable support assembly is being changed in its overall effective height.
The height change is made by employing a self contained hydraulic jacking device. It is removably positioned between respective receiving structures located on both a supporting leg and a legsurrounding sleeve of a respective adjustable. support assembly-During each height adjustment of a respective support assembly, a mechanical interlock between the supporting leg and its surrounding sleeve is kept in a released positon. until the new adjustable height is reached.
The surrounding sleeves are positoned about the campers, generally one at each corner, by using load distributing brackets, secured between them and the campers by employing various fasteners. Using these adjustable support assemblies, hydraulically moved in sequency by operation of a removable hydraulic jacking unit, a camper is always safely handled and supported in a most convenient way.
DRAWINGS OF THE PREFERRED EMBODIMENT relatively move the components of the adjustable support assemblies and consequently cause movement of the camper relative to the pickup truck, the mechanical interlock being shown in its retracted position;
FIG. 3 is a partial perspective view showing how the hydraulic jacking unit is conveniently removed and installed to be effectively used with all the adjustable support assemblies during loading or unloading of the camper;
FIG. 4 is a partial elevational view alongside the pickup truck and camper showing the right front adjustable support assembly with the hydraulic jack in place;
FIG. 5 is a partial elevational view of the adjustable support assembly, with the hydraulic jack in place, as viewed from the side of a pickup truck and camper;
FIG. 6 is a partial sectional view taken along broken section line 6--6 of FIG. 4, showing the interlock in its locking position to preventrelative movement between the supporting leg and the surrounding sleeve; and
FIG. 7 is a partial sectional view taken along section line 7-7 of FIG. 4, illustrating how the base of the hydraulic jack is held in the supporting leg.
DESCRIPTION OF THE PREFERRED EMBODIMENT been located to raise camper 12 above pickup 10. On
the right forward adjustable support assembly 14, a removable hydraulic jack 16 is illustrated, in its operating position.
If camper 12 is ready to be raised above pickup 10,
then hydraulic jack 16, after withdrawing an interlock 18, is actuated by hand movements applying force through the lever handle 20, as illustrated in FIG. 2. If, however, camper 12 is completely loaded on pickup 10 and ready for a trip, then, as illustrated in FIG. 3, hydraulic jack 16 is removed. Thereafter the supporting leg 22is raised up passing in part through the surrounding guide sleeve 24 to a position well clear of the roadway. Interlock 18, biased by coil spring 26, keeps the supporting leg 22 and the guide sleeve 24 in the raised over the roadway position. Self Contained Adjustable Support Assemblies As illustrated throughout FIGS. 1 through 6, at each corner of camper 12, a self contained adjustable support assembly14 is secured to camper 12. Preferably, a corner bracket 30 is well fastened to the camper 12 to distribute the supporting loads into the camper fram ing, not shown. At two or more locations spacing and mounting tabs 32 are formed along corner bracket 30. Overlapping tabs 34 are formed on guide sleeve 22. When the holes 36 of these tabs 32, 34 are aligned, fastening assemblies 38, each having a bolt 40 and nut 42, are used to firmly position guide sleeve 24 with respect to camper 12.
Each supporting leg 22 is sized to pass through guide sleeve 24 with limited clearance. Whenever interlock 18 is removed relative movement occurs until the base plate 46-on leg 22 contacts the ground. If hydraulic jackl6 is still installed, it will lower away also and therefore it should be held. I r
The Adjustable Interlock of the Support Assemblies The interlocking of supporting leg 22 and guide sleeve 22 is undertaken at several selected locations by providing many pin receiving holes 50 throughout supporting leg 22. Also during the jacking operations these same holes are utilized to receive a bottom load transfer pin 52. It is secured to a bottom plate 54 that inturn is fitted to the base 56 of hydraulic jack 16, as shown in FIGS. 4, 5, and 7. 1
Once a selected location is determined by jacking or by hand positioning of supporting leg 22 with respect guide sleeve 24, the pin 58 ofinterlock assembly 18 is inserted through hole 60 in sleeve 24 and beyond through the respective aligned hole 50in supporting leg 22. Pin 58 is supported and guided by bracket 64 that is secured to sleeve 24. Pin 58 has a turned end 66 serving as a handle. It also has a circular flange to contact the end of coiled spring 26 which keeps pin 58 in its interlock position until intentionally withdrawn.
During intended relative movements between supporting leg 22 and guide sleeve 24, by applying a retracting force at handle 66, pin 58 is withdrawn against the force of spring 26 until it is cleared from hole 50 of leg 22, hole 60 of sleeve 24 and hole 70 in bracket 64. Thereafter, pin 58 is angled to one side while still kept in hole 72 in bracket 64 and biased by spring 26' into contact with bracket structure adjacent to hole 70. Once an interim or final relative position is reached. between supporting leg 22 and guide sleeve 24, then pin 58 of interlock 18 is realigned and spring biased back through holes 70, 60 and a selected hole 50, to thereby lock them together once again as a supporting assembly. Self Contained Hydraulic lacking Assembly As a manner 'of economy and practicality, and quick overall operations, the self contained hydraulic jacking assembly 16 is equipped with accessories to be removably fitted to each support assembly. At the base 56 of hydraulic cylinder 76, a base plate 54 is secured and to it inturn is secured a load transfer pin 52 capable of closely fitting the holes 50 along leg 22.
No special fitting is secured directly to the piston 78 of hydraulic jack 16. However, bracket 64 is preferably enlarged below to form a receiver 80 into which piston 78 may be inserted, as illustrated in FIGS. 1 through 5.
Therefore, at anytime hydraulic jack 18 is readily placed into a jacking position or readily withdrawn when interlock 18 is actively transferring part of the camper load between'guide sleeve 24 and supporting leg 22.
Operation of hydraulic jack .16 during height changes in undertaken by using removable handle 20, as shown in FIG. 2. When not is use, handle 20 and hydraulic jack 16 are carried inside the camper or pickup. Summary of Advantages One person may safely and conveniently lower or raise a camper 12 with respect to a pickup and to the ground, by operating a hydraulic jack 16 throughout its major stroke, alternately, at the respective corner located adjustable support assemblies 14, keeping at least three support assemblies always mechanically locked by interlock 18 to support the camper 12. Betweentrips of alternate uses of a pickup lie jack 16 alternately at the respective comers of the camper 12. At all transfer times, the camper 12 remains under control as at least three interlocks 18 are always engaged. During the removed storage times, camper 12 is firmly supported by all four adjustable support assemblies 14. I
After loading of camper 12 on pickup 10 and removal of hydraulic jack 16, each adjustable support assembly 14, is very quickly well cleared of the roadway by hand raising the supporting legs 22 up through the guide sleeves and thereafter locking them again in these retracted positions by using interlock 18. After the return from a trip and conversion back to a pickup truck is wanted, interlocks 18 are cleared and supporting legs are quickly dropped to the ground, again saving much time in making the conversion from recreational vehicle to a work vehicle and viceversa. Therefore, the hydraulic jack 16 is only needed to clear camper 12 just above pickup 10 during unloading, and to lower it just this short distance during loading of camper 12 on pickup 10.
1. Adjustable support assemblies to support, raise and lower a covered space facility with respect to both a vehicle and the ground, each assembly comprising:
a. a supporting leg;
b. a guide in which the supporting leg moves;
0. means to interlock the supporting leg to the guide at selective effective heights of the supporting leg; and
d. means, to receive a self contained hydraulic jacking unit positioned between the guide and the supporting leg, whereby, upon release of the interlock means, a hydraulic jacking unit is moved through it operating stroke to change the effective height of the supporting leg, comprising a pin securable to a base of the hydraulic jacking unit, several spaced pin receivers in the supporting leg to receive the pin when it is secured to the hydraulic jacking unit, a receiver secured to the guide into which top portions of the hydraulic jacking unit may be inserted.
2. Adjustable support assemblies, as claimed in claim 1, wherein each assembly also comprises an attachment structure to be secured to a covered space facility to distribute loads transmitted from the guide.
3. Adjustable support assemblies, as claimed in claim 2, wherein multiple connection means are used between the attachment structure and the guide, each comprising, overlapping horizontally extending tabs with central openings, arranged in pairs and joined respectively to the attachment structure and guide, and removable fastener assemblies insertable through the central openings of the tab and then secured to hold the 10 as a truck and as a recreational vehicle, the camper 12 is conveniently raised and lowered, preferably, only a limited. distance in a very short time using the hydrauextending tabs together and to transmit the supporting loads between the covered space facility and the guide.
4. An adjustable support assembly to be secured to the corner structure of a camper dwelling, and operated in sequence with other like adjustable support assemblies so secured to raise and to lower a camper dwelling with respect to a pickup truck and then to maintain the relative position selected, comprising:
a. a supporting leg having a foot for load distributing ground contact and a body for relative movement with respect to a guiding member, the body having spaced receiving structures to receive a locking member and to receive a hydraulic jacking member;
. a guiding member to receive the supporting leg for relative movement and having a receivingstructure to receive a locking member and a receiving structure to receive a hydraulic jacking member, and having fastener connection structures utilized when the adjustable support assembly is secured to corner structure of a camper dwelling;
. a removable locking member for interlocking the member is removed and prepared for making another elevational change; and
a removable self contained hydraulic jacking unit having a projecting means secured to its base to be selectively and removably located in one of the several receivingstructures of the body of the supporting leg depending on the height adjustment to be made, and also the top of the hydraulic jacking unit to be located in a receiving structure of the guiding member, and thereafter, the hydraulic jacking unit is effectively operated to raise and to lower the camper dwelling with respect to a pick up truck, and, when no longer needed, to be removed during rapid adjustments of the body of the supporting leg relative to the guiding member when no camper dwelling load is being supported such as when the camper dwelling is securely in place on a pick up truck.