Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS2068405 A
Publication typeGrant
Publication dateJan 19, 1937
Filing dateDec 11, 1933
Priority dateDec 11, 1933
Publication numberUS 2068405 A, US 2068405A, US-A-2068405, US2068405 A, US2068405A
InventorsFitz Gerald John W
Original AssigneeBriggs & Stratton Corp
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Lock
US 2068405 A
Abstract  available in
Images(3)
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

Jan. 19, 1937. J. W. FlTZ GERALD l 2,068,405

LOCK

1 Filed Dec. 11, 1933 3 Sheets-Sheet 1 Y 17m Lam/2552517" J. W. FlTZ GERALD LOCK Jam. 19, 193?.

Filed Dec. 11, 1955 3 Sheets-Sheet 3 475/727 WE/zF m/U Patented Jan. 19, 1937 UNITED STATES PATENT OFFICE LOCK Application December 11, 1933, Serial No. 701,839

25 Claims.

This invention relates to improvements in looks and refers more particularly to key controlled tumbler locks.

It is a general object of this invention to provide a lock having greater security against unauthorized opening either by picking or decoding, than locks heretofore in use.

With this general object in view, this invention contemplates the provision of novel means for positively interlocking the lock cylinder with its casing in the event torsional stress is applied to the cylinder without first properly retracting the tumblers.

The invention also contemplates the provision of an interlocking means which is so constructed that it provides the edges adjacent the ends of the tumblers, and which by reason of the movement of the interlocking means with the cylinder are at all times so located that no surface remains against which the tumblers might be brought to bear in an attempt at decoding.

More specifically, it is an object of this invention to provide means to positively interlock the cylinder and its casing in the event of rotation without first retracting all of the tumblers, which means is in the form of a cylinder or sleeve completely encircling the lock cylinder and having diametrically opposite openings to receive the tumbler ends through which rotaw tion of the lock cylinder is transmitted to the sleeve.

Another object of this invention is to so form the openings in the interlocking sleeve as to increase the protection against the possibility of decoding.

A still further object of this invention is to mount the interlocking sleeve independently of the lock cylinder and in such a manner that its purpose cannot be wilfully defeated by cramping 49 it either against the lock cylinder or the outer casing or by having it bind on the cylinder or casing.

Another object of this invention is to provide novel means for positively interlocking the lock cylinder with its casing in the event torsional stress is applied to the cylinder without first properly retracting the tumblers.

In this respect, it is a further object of this invention to so form the interlocking means that all edges adjacent the ends of the tumblers move with the .cylinder so that no surface remains against which the tumblers might be brought to bear in an attempt at decoding.

Another object of this invention is to mount 5;, the interlocking member independently of the lock cylinder and in such a manner that its purpose cannot be wilfully defeated by cramping it against either the lock cylinder or the outer casing, or by having it bind on the cylinder or casing by corrosion.

A further object of this invention is to provide a lock in which certain of the tumblers are formed to be engageable with or hook over an adjacent edge during an attempt at picking so that it is impossible to pull these particular tumblers down sufficiently far to free the cylinder for rotation. I

With the above and other objects in view which will appear as the description proceeds, my invention resides in the novel construction, combination and arrangement of parts substantially as hereinafter described and more particularly defined by the appended claims, it being understood that such changes in the precise embodiment of the herein disclosed invention may be made as come within the scope of the claims.

In the accompanying drawings, I have illustrated two complete examples of the physical embodiment of my invention constructed according to the best modes I have so far devised for the practical application of the principles thereof, and in which:

Figure 1 is a side view of a lock embodying this invention, the outer casing and shell being shown in longitudinal section;

Figure 2 is a perspective view of the lock cylinder per se removed from the rest of the lock;

Figure 3 is a perspective view of the interlocking member;

Figure 4 is a perspective view of the stationary mounting sleeve;

Figure 5 is a cross section view through Figure 1 on the plane of the line 5-5;

Figure 6 is a longitudinal section view through Figure 5 on the plane of the line 6-6;

Figure 7 is a side view with parts broken away and in section showing a modified embodiment of this invention;

Figure 8 is a cross section view of the modified embodiment shown in Figure '7, said view being taken on the plane of the line 8-8 of Figure 9; and

Figure 9 is a longitudinal section view through Figure'Z, substantially on the plane of the line 99.

Referring now more particularly to the accompanying drawings in which like numerals indicate like parts throughout the several views, the numeral 5 indicates the lock cylinder which is preferably formed as a die-casting and has an enlarged head 6 at its outer end, and a latch actuating stem 1 projecting from its inner end.

Partially encircling the base of p the stem 1 is a section of a cylindrical skirt 8. In the space between the skirt section 8 and the stem, a torsion spring 9 is mounted. The ends of this spring are looped over the edges of the skirt section 8 and project out beyond these edges to also engage adjacent edges (not shown) carried by the mounting sleeve 12 in which the cylinder is rotatably mounted. The spring 9 thus yieldably holds the cylinder in its normal position of rotation from which it may be turned in either direction.

lhe mounting sleeve [2 is fixed in an outer supporting member l3, and rotatably mounts the cylinder by means of a counterbore l4 receiving the inner portion 6' of the cylinder, and a small diameter bore 15 receiving a cylindrical projection It on the inner end of the cylinder. The projection lficarries the skirt section 8 as an extension thereof.

The cylinder is thus rotatably mounted at its opposite ends and has its major portion spaced from the mounting sleeve. In this space, the interlocking member H which is in the form of a sleeve, is freely rotatably mounted, as will be hereinafter more fully described,

Any means may be employed to hold the cylinder in the mounting sleeve. In the present instance, this function is performed by a screw l8 threaded into the mounting sleeve with its inner end projecting into an arcuate groove 19 in the adjacent portion of the cylinder.

The tumblers 20. are mounted in a rectangular chamber or opening 2| extending diametrically through the central portion of the cylinder. Any desired type of tumbler may be employed. The tumblers illustrated are similar to those shown and described in the copending application of Edward N. Jacobi,.filed November 3, 1933, Serial No. 696,467, and are arranged in pairs to be oppositely projected by common springs one for each pair of tumblers.

All of the tumblers are cut away at one side to provide key receiving recesses or keyways 23 in line with a key opening 24 in the cylinder. Extending down the key opening 24 and continuing. along the side wall of the chamber 2| to project into the key-ways 23 of all of the tumblers is a rib 25. This rib like the tiunblers, is shown and described in detail in the aforesaid application of Edward N. Jacobi, and forms no part of the present invention.

'Intheir normal'locked or projected positions, the tumblers project through diametrically opposite openings34 in the interlocking sleeve and into slots or openings 35 in the mounting sleeve I 2. The openings .35 are wider than the openings 34 and the width of the tumblers, so as to permit adegree-of turning on the part of the cylinder when the tumblers are in their operative positions. During this permitted turning motion, the interlocking sleeve is actuated to its operative position, as will be hereinafter more fully described.

The interlocking sleeve I! is freely rotatably mounted by four rotatably mounted rods or pins 36'-locatedat the frontend of the lock and four similar rods or pins 31 at the rear end of the lock. These pins are freely rotatably and slidably mounted in slitted bores 38 formed in the mounting sleeve l2. The slits in the bores 38 permit the cylindrical surfaces of the pins to project beyond the adjacent inner Surface of the mounting sleeve so as to space the interlocking sleeve I! from the mounting sleeve. The pins 35 and 3'! thus provide a roller bearing support for the interlocking sleeve.

These pins 36 and 31 also coact with compression springs 39 confined between the inner ends of the pins, as best shown in Figure 6, to yieldably urge the interlocking sleeve inwardly with respect to the lock structure. For this purpose, the outer pins 36 bear against the inner face 48 of the head 6 on the cylinder and the pins 3'! engage abutments 4! formed on the inner end portion of the interlocking sleeve.

The extreme inner end of the sleeve has a plurality of cam projections 42 having inclined faces which engage correspondingly inclined abutments 43 formed as integral parts of the mounting sleeve l2. The action of the springs 39 through the pins 36 and I1 yieldably retains the interlocking sleeve in its innermost position at which the cam projections 42 are at the bottom of the inclined abutments and the openings 34 in the sleeve align with the ends of the tumblers so as not to obstruct thefree projection of the tumbler ends therethrough.

As hereinbefore brought out, the excess width of the openings 35 in themounting cylinder per-V mits a degree of rotation on the part of the cylinder and the interlocking sleeve while the tumblers are fully projected. In the event such rotation is imparted to the interlocking sleeve by turning of the cylinder while any tumbler is in any but fully retracted position, the coacting inclined faces 42 and 43 slide the interlocking sleeve outwardly to engage locking lugs 44 carried on the outer end thereof, in recesses 45 formed in the head of the cylinder.

Upon completion of the degree of rotation of the cylinder and interlocking sleeve sufficient to engage the locking lugs 44in the cylinder head recesses 45, the ends 46 of the abutments or arouate projections 4! on'the sleeve will engage stop abutments 41 formed on the mounting cylinder. The engagement of the ends 46 with these stop abutments positively prevents further rotation of the interlocking sleeve and consequently the cylinder even though the tumblers may be subsequently retracted.

Upon release of the torsional stress which has turned the cylinder and sleeve to effect the interlocking of the cylinder and the stationary sleeve I2, the springs 39 act to return the interlocking sleeve and consequently the cylinder to normal locked position.

It is to be noted that when the lock is in its locked condition and the tumblers are projected to their operative positions, there is no surface or edge against which the tumblers can be brought to bear to effect decoding. The application of any torsional'stress on the cylinder, as in an attempt to engage the corners of the tumblers under adjacent edges, rotates the interlocking sleeve, so that the sides of the openings 34 which form the only edges adjacent the corners of the tumblers, move with the tumblers and are thus so located that at no time will there be a surface against which the tumblers can be brought to bear.

'In View of the fact that thecylinder is journalled at its opposite ends, there need be no contact Whatever between the cylinder and the inner surface of the interlocking sleeve, and in fact, a slight clearance is left between these two surfaces. This clearance, together with the roller bearing mounting for the interlocking sleeve insures. its .free rotation.

This free floating support for the interlocking sleeve also makes it impossible to cramp the cylinder against the sleeve and hold it frictionally against turning, which is sometimes attempted during picking of the lock, and thus insures unrestricted functioning of the interlocking sleeve at all times.

While the provision of the roller bearing support for the interlocking sleeve is preferable from the standpoint of ease of operation, the inventive concept is also readily applicable to a lock structure in which the interlocking sleeve is journalled directly on the lock cylinder and in Figures '7, 8 and 9, this modification of the invention is illustrated.

The general arrangement of the elements is the same in this embodiment as in the form described. The lock cylinder is rotatably mounted in a mounting sleeve [2 and is provided with the oppositely projecting tumblers 2D in the same manner as in the embodiment hereinbefo-re described.

The distinction lies in the construction of the interlocking sleeve 58 and its assembly with the lock cylinder and casing. In this instance, the interlocking sleeve has a uniform internal diameter as well as a uniform external diameter and is freely rotatably journalled directly on the lock cylinder. At diametrically opposite sides, the interlocking sleeve has generally rectangular openings 5| to receive the projected end portions of the tumblers, and as best illustrated in Figure 9, the sides of these openings instead of being straight, are stepped. Consequently, the protection against possible decoding is materially amplified as rotation of the lock cylinder, while any tumbler is still partially projected, will be imparted to the interlocking sleeve through such tumbler engaging its step and all of the tumblers inwardly of the active tumbler will be spaced a substantial distance from the adjacent edge of the opening 5|. Hence, it will be impossible to engage the inner tumblers under the edges of the interlocking sleeve while said active tumbler is engaging its step.

As in the embodiment shown in Figure 1, the forward end of the interlocking sleeve has a locking lug 52 projecting therefrom to engage in a notch or recess 53 in the inner wall of the head of the cylinder upon forward longitudinal shifting of the interlocking sleeve.

The means for effecting forward axial shifting of the interlocking sleeve consists of two diametrically opposite pins 54 anchored in the mounting sleeve l2, and engaging in V-shaped slots 55 in the interlocking sleeve (see Figure '7).

The apexes of the V-shaped slots are pointed to the front of the lock so that upon relative rotation between the interlocking sleeve and the mounting sleeve which carries the pins 54, forward longitudinal motion will be imparted to the interlocking sleeve' The return of the interlocking sleeve to its normal inactive position is effected by retracting the lock cylinder back to its normal position.

From the foregoing description taken in connection with the accompanying drawings, it will be readily apparent to those skilled in the art, that this invention affords a novel, sturdy lock which cannot be picked or decoded, at least with any known instrument or method.

What I claim as my invention is:

1. In a look, a rotatable lock cylinder, a stationary element in which said lock cylinder is mounted, locking tumblers carried by the cylinder to restrain rotation of the cylinder with respect to the stationary element, said locking tumblers being retractable by a proper key to free the cylinder for rotation, a member encircling the lock cylinder, said member being engageable by the projected ends of the tumblers, means on said member operable upon movement to a predetermined position to form a positive interlock between the lock cylinder and stationary element, and means to move said member to said predetermined position upon rotation of the lock cylinder effected while any tumbler is in any but fully retracted position.

2. In a lock including a rotatable lock cylinder and a stationary element mounting the lock cylinder, and an interlocking sleeve encircling the lock cylinder, said interlocking sleeve being longitudinally shiftable to a position positively interlocking the cylinder and stationary element.

3. In a look, a stationary element bored to receive a lock cylinder, a rotatable lock cylinder journalled at its ends in the stationary element with its medial portion spaced from the wall of the bore, an interlocking element surrounding the lock cylinder in the space between the wall of the bore and the cylinder and rotatably mounted in said bore independently of the lock cylinder with a clearance space between said interlocking element and the cylinder, and means on said interlocking element to engage portions of the stationary element and the lock cylinder to positively interlock said elements against relative rotation under certain conditions.

4. In a lock, a stationary element, a lock cylinder rotatably mounted in said stationary element, an interlocking sleeve encircling the lock cylinder, means on said sleeve engageable with the stationary element and the lock cylinder to positively interlock said units against relative rotation upon longitudinal shifting of said sleeve, and means to shift said sleeve longitudinally upon unauthorized rotation of the lock cylinder.

5. In a lock, a rotatable lock cylinder, a stationary member to mount the lock cylinder, a member movable relative to the lock cylinder and the stationary element to interlock the cylinder and stationary member, and means mounting said interlocking member independently of the lock cylinder and spaced from the stationary member to preclude interference with the proper functioning of said interlocking member by contact with either the lock cylinder or the stationary member.

6. In a look, a lock cylinder, a stationary-member rotatably mounting the lock cylinder, a sleeve telescoped over the lock cylinder, means mounting said sleeve in the stationary mounting member of the lock cylinder, means on said sleeve operable upon endwise shifting thereof to interlock the lock cylinder and mounting member, and means to shift said sleeve endwise upon rotation thereof.

7. In a look, a lock cylinder, a stationary mounting member rotatably mounting the cylinder, a rotatable and endwise shiftable interlocking member disposed between the lock cylinder and the stationary mounting member, means on said member to establish an interlocking connection between the cylinder and the mounting member upon endwise shifting of said member, and means to shift said interlocking member endwise upon turning thereof.

8. In a lock, a lock' cylinder, locking tumblers carried by the lock cylinder and yieldably projected from the lock cylinder, a stationary mounting member having recesses into which the spring projected ends of' the tumblers extend, said recesses being wider than the width of the tumblers, whereby the lock cylinder has a predetermined degree 'of permitted rotation with respect to the mounting member While the tumblers are in their projected positions, an interlocking sleeve disposed between the cylinder and the stationary mounting member, said sleeve having openings through which the ends of the tumblers project, said openings being but slightly wider than the tumblers so that application of turning force to the cylinder effected while any tumbler is still partially projected likewise imparts rotation to said interlocking sleeve, means to shift the sleeve endwise upon turning thereof, and means operable upon endwise shifting of the sleeve to effect an interlocking connection between the cylinder and the stationary mounting member. 7

9. In a look, a lock cylinder, tumblers carried by the lock cylinder and yieldably projected from the lock cylinder, a stationary mounting member to rotatably mount the cylinder, said stationary mounting member having recesses to receive the projected ends of the tumblers, said recesses being wider than the width of the tumblers to allow a predetermined degree of rotation on the part of the lock cylinder while the tumblers are in their projected locking positions, a movable member having openings through which the tumblers project for engagement with the recesses of the stationary member, said openings being narrower than the'recesses so that the edges thereof are near the tumblers to be engaged by the tumblers upon turning of the lock cylinder while the tumblers are projected so that said edges move with the cylinder and the tumblers to retain their relative positions with respect to the tumblers and prevent decoding by bringing the tumblers to bear against the corner of any one of said edges, and means to positively interlock said lock cylinder and stationary mounting member upon rotation of the cylinder effected while the tumblers are projected prior to the tumblers reaching the edges of the recesses in the stationary mounting member.

10'. In a lock, the combination of a lock cylinder having spring projected tumblers, an interlocking sleeve telescoped over the cylinderand having openings through which the spring projected ends of the tumblers extend, and a common mounting member to freely rotatably mount the cylinder and the sleeve entirely independently of each other and with a clearance space therebetween.

11. In a lock, the combination of a lock cylinder having spring projected tumblers, an interlocking sleeve telescoped over the cylinder and having openings through which the spring projected ends of'the tumblers extend, a common mounting member to freely rotatably mount the cylinder and the sleeve entirely independently of each other, and means on said sleeve engageable upon predetermined movement thereof with portions of the lock cylinder and the mounting member to positively interlock said units against relative movement.

12. In a lock, the combination of a lock cylinder having tumblers yieldably projected from opposite sides of the cylinder, an interlocking sleeve telescoped over the cylinder and having 7 diametrically opposite openings through which the projected ends of the tumblers extend, and a common mounting member to freely rotatably mount the cylinder and'the sleeve entirely independently of each other and with a clearance space therebetween.

13. In a look, a rotatable lock cylinder, tumblers yieldably projected from the lock cylinder, an interlocking sleeve telescoped over the lock cylinder and having openings through which the projected ends of the tumblers extend, the tumblers engaging the sides of said openings to impart rotation to said sleeve upon turning of the cylinder while the tumblers are projected from the cylinder, a stationary mounting member rotatably mounting the cylinder and the sleeve, cooperating cam means carried by the sleeve and the stationary mounting member to move the sleeve endwise upon turning thereof by the cylinder, and means on said sleeve engageable with portions of the cylinder and the mounting member upon such endwise shifting of the sleeve to positively'interlock the cylinder and mounting member.

14. In a lock, the combination of a rotatable lock cylinder having retractable spring pressed tumblers normally projecting therefrom, an interlocking sleeve telescoped over the cylinder and having openings through which the spring projected ends of the tumblers project, a common mounting member freely rotatably mounting the cylinder and the sleeve independently of each other, said sleeve being rotatable by the lock cylinder upon application of turning stress imparted thereto while any tumbler is in any but fully retracted position,,cooperating cam means on the sleeve and the mounting member to move the sleeve endwise upon turning thereof, spring means yieldably retaining the sleeve in its normal position, and means on the sleeve engageable with portions of the cylinder and mounting member to interlock said elements and secure the lock cylinder against further rotation.

15. In a look, a rotatable lock cylinder, a mounting member for the lock cylinder, an interlocking member encircling the cylinder and operable upon movement to a predetermined position to interlock the cylinder and mounting member, and means to freely rotatably mount the interlocking member including a plurality of rotatable elements between the interlocking member and the mounting member.

16. In a lock, a rotatable lock cylinder, a mounting member rotatably mounting the lock cylinder with a space between part of the cylinder and the mounting member, an interlocking sleeve encircling the cylinder and disposed in said space between the cylinder and mounting member, means on said interlocking sleeve to engage portions of the cylinder and mounting member to interlock the same upon predetermined ,movement of said sleeve, and means to freely rotatably mount said sleeve from the mounting member entirely independently of the lock cylinder including anti-friction means disposed between the interlocking sleeve and the mounting member.

17. In a look, a lock cylinder, a mounting member for the lock cylinder, an interlocking sleeve telescoped over the lock cylinder, means on said interlocking sleeve engageable with por-' tions of the cylinder and mounting member upon endwise movement of the sleeve with respect to the cylinder and the mounting member to interlock said elements, means to impart endwise movement of the sleeve upon turning thereof, and means to yieldably retain the sleeve in an inactive position, said last mentioned means in-. cluding a plurality of pins carried by the mounting member and forming roller bearings to freely rotatably mount the sleeve.

18. In a look, a lock cylinder, a mounting member for the lock cylinder, an interlocking member normally in an inoperative position and movable to an operative position positively interlocking the lock cylinder and the mounting member, means to transmit rotation to the interlocking member upon actuation of the lock cylinder by means other than its proper key, and common means to move the interlocking member to its operative position upon rotation of the interlocking member and to positively limit the possible rotation of the interlocking member.

19. In a look, a mounting! member, a lock cylinder therein, tumblers carried by the lock cylinder retractable by the insertion of a proper key to free the cylinder for rotation, an interlocking member engageable by any tumbler not fully retracted to be turned upon turning of the lock cylinder while any one of the tumblers is in any but fully retracted position, cooperating means on said interlocking member and the lock cylinder adapted upon relative axial shifting between said interlocking member and cylinder to provide a non-rotatable connection therebetween, and cooperating means carried by the mounting member and the interlockingv member to effect axial shifting of the interlocking member upon rotation of the interlocking member and to positively limit rotation of the interlocking member.

20. In a look, a bored mounting member, a lock cylinder therein, tumblers carried by the lock cylinder retractable by a proper key to free the cylinder for rotation, an interlocking member disposed between the lock cylinder and the mounting member bore and having a part engageable by a tumbler in any but fully retracted position and having means to efiect a non-rotatable connection with the lock cylinder upon 1ongitudinal shifting of the interlocking member in one direction, and cooperating means carried by the mounting member and the interlocking member operable to shift the interlocking member in said direction upon rotation of the interlocking member imparted thereto from the lock cylinder through the engagement of a tumbler with the interlocking member, and said cooperating means also positively limiting the rotation of the interlocking member.

21. In a look, a bored mounting member, a lock cylinder having key operable tumblers and mounted to rotate in the mounting member, an interlocking member disposed between the lock cylinder and the bore of the mounting member and operable upon axial shifting thereof to effect an interlock with the lock cylinder, a pin carried by one of'said members and engaging in an inclined slot in the other of said members to effect axial shifting of the interlocking member upon rotation thereof, and said interlocking member being rotatable as a result of rotation transmitted thereto from the lock cylinder through any tumbler in any but retracted position.

22. In a look, a bored mounting member, a lock cylinder having key operable tumblers in the mounting member, an interlocking member disposed between the lock cylinder and the bore of the mounting member and operable upon axial shifting thereof to effect an interlock with the lock cylinder, a pin carried by one of said members and engaging in an inclined slot in the other of said members to effect axial shifting of the interlocking member upon rotation thereof, and said interlocking member being rotatable as a result of rotation transmitted thereto from the lock cylinder through any tumbler in any but retracted position, and said slot also defining the limits of rotation of the interlocking member.

23. In a lock structure, the combination of a casing, a rotatable cylinder in said casing having radially extending locking tumblers, a sleeve within said casing surrounding said cylinder and having a slot for receiving the cylinder tumblers when projected, said sleeve being free to rotate by the engagement of the projected tumblers therewith when the cylinder is rotated, and means controlled during the initial part of such rotary movement of the sleeve with the cylinder to directly lock the cylinder against further rotational movement.

24. A lock structure comprising a casing, a cylinder rotatable in said casing and having radially projectable tumblers, a sleeve freely rotatable in said casing and surrounding said cylinder and having a slot for receiving the tumblers when projected and by which said sleeve will be caused to rotate with said cylinder when the tumblers have not been withdrawn by the insertion in the cylinder of a proper key, a locking member on said casing, and means controlled by the rotary movement of said sleeve with said cylinder for interlocking said locking member with said cylinder to prevent further rotational movement thereof.

25. In a lock, the combination of a casing, a lock cylinder in said casing having transverse passageways therethrough and locking tumblers shiftable in said passageways to normally pro- J'ect beyond the ends thereof and to be withdrawn into the cylinder when a proper key is inserted in the cylinder, and structure intermediate said casing and cylinder and having passageways for coinciding with opposite ends of said tumbler passageways to receive the ends of projected tumblers, said intermediate structure being movable with the projected tumblers upon turning of the cylinder whereby to retain the passageways therein in alignment with the tumbler passageways.

JOHN W. FITZ GERALD.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4440007 *Mar 2, 1981Apr 3, 1984EVVA-Werk Specialerzeugung von Zylinder-und-Sicherheitsschlossern GmbH & Co. KGControl device for cylinder locks
US5070716 *Feb 8, 1990Dec 10, 1991Rover Group LimitedDoor latch mechanism
US6058751 *Sep 8, 1998May 9, 2000Strattec Security CorporationFree-wheeling lock
US6523382Jan 10, 2001Feb 25, 2003Strattec Security CorporationFree wheeling lock assembly
US6711924Jun 18, 2002Mar 30, 2004Strattec Security CorporationFreewheeling lock apparatus and method
US6978645Jun 23, 2003Dec 27, 2005Strattec Security CorporationFreewheeling lock apparatus and method
Classifications
U.S. Classification70/419
International ClassificationE05B9/00, E05B9/08
Cooperative ClassificationE05B9/086
European ClassificationE05B9/08C2