Key operated latch with combined rotational and translational latching action
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
E05B-06506
E05B-01704
출원번호
US-0654148
(2003-09-03)
발명자
/ 주소
Vickers, James H.
출원인 / 주소
Southco, Inc.
대리인 / 주소
Paul &
인용정보
피인용 횟수 :
12인용 특허 :
8
초록▼
A key operated latch includes a housing which supports a lock plug, a motion control sleeve, and a sleeve-like cam therein. The cam rotates with the lock plug, while the motion control sleeve is stationary. The cam has at least one cam slot, and the motion control sleeve has at least one motion cont
A key operated latch includes a housing which supports a lock plug, a motion control sleeve, and a sleeve-like cam therein. The cam rotates with the lock plug, while the motion control sleeve is stationary. The cam has at least one cam slot, and the motion control sleeve has at least one motion control slot. A shaft extends outward from the housing and has at least one projection which is engaged with both the cam slot and the motion control slot. The cam slot and the motion control slot are configured such that rotation of the lock plug imparts a sequence of rotational and axial movements to the shaft. A latching member attached to the shaft, moves between a latched position and an unlatched position in a sequence of axial and rotational motions in order to selectively secure a door, panel, or the like in the closed position. Also disclosed are additional embodiments that incorporate a wing knob or that have a lock plug sleeve and a motion control sleeve that are combined into a single part of one-piece construction. In one of the embodiments having a wing knob the wing knob freewheels without opening the latch when the lock plug is in the locked configuration.
대표청구항▼
1. A latch mechanism comprising:a housing having a first end and a second end, said second end of said housing having an opening; a first sleeve rotatably supported by said housing; a slide supported for slidable movement relative to said first sleeve and for rotation with said first sleeve; a lock
1. A latch mechanism comprising:a housing having a first end and a second end, said second end of said housing having an opening; a first sleeve rotatably supported by said housing; a slide supported for slidable movement relative to said first sleeve and for rotation with said first sleeve; a lock plug supported by said first sleeve, said lock plug being selectively rotatable between a locked position and an unlocked position relative to said first sleeve using a key, said lock plug moving said slide to an engaged position when said lock plug is in said unlocked position; a cam having at least one cam slot, said cam being rotatably supported within said housing, said cam being coupled to said slide so as to rotate between latched and unlatched positions in response to rotation of said first sleeve when said lock plug is in said unlocked position; means defining an edge supported in said housing; and a shaft positioned at least in part within said housing, said shaft extending through said opening in said second end of said housing, said shaft having at least one projection which is engaged at least to said at least one cam slot, said at least one cam slot being configured such that said shaft moves substantially rotationally as said cam moves from said unlatched position toward said latched position until said projection abuts said edge, thereafter said shaft moving substantially axially as said cam rotationally moves to said latched position, whereby said first sleeve rotates without rotating said cam when said lock plug is in said locked position to thereby prevent said latch mechanism from being defeated by application of excessive torque to the first sleeve. 2. The latch mechanism according to claim 1, wherein the latch mechanism is adapted for mounting to a closure member, the closure member is a first closure member and cooperates with a second closure member, said housing has a flange at said first end thereof, said housing has an exterior surface having interrupted screw threads formed thereon for engagement by a mounting nut for securing said housing in place when said housing is mounted to one of the first closure member and the second closure member.3. The latch mechanism according to claim 2, wherein said lock plug is of the type having a key access opening and an array of wafers that retract upon insertion of a key to thereby allow rotational motion of said lock plug under the control of a user, wherein said means defining an edge defines at least one motion control slot, said edge being part of said at least one motion control slot, and wherein said first sleeve includes means for retaining said lock plug in said locked position that is engaged by said array of wafers when said array of wafers are not retracted.4. The latch mechanism according to claim 3, wherein said cam is substantially in the form of a cylindrical sleeve having a wall thickness, said cam slot extends through said wall thickness of said cam, said cam has a distal end and a proximal end relative to said first end of said housing, said cam has a pair of ears extending from said proximal end thereof, and said slide has a pair of notches which matingly receive said pair of ears of said cam to thereby allow said cam to move rotationally with said slide when said slide is in said engaged position.5. The latch mechanism according to claim 4, wherein said cam slot has a proximal end closest to said proximal end of said cam and a distal end farthest from said proximal end of said cam, said cam has a longitudinal axis, and said cam slot has a pitch such that the axial distance, measured in a direction parallel to said longitudinal axis of said cam, between said cam slot and said proximal end of said cam increases in the clockwise direction, beginning at said proximal end of said cam slot, as viewed by a viewer facing said proximal end of said cam.6. The latch mechanism according to claim 5, wherein said means defining an edge is a motion control sleeve having at least one motion control slot defined at least in part by said edge, said motion control sleeve has a longitudinal axis, said motion control slot has an axial slot portion extending substantially parallel to said longitudinal axis and a circumferential slot portion, said circumferential slot portion being continuous with said axial slot portion and extending from an end of said axial slot portion in a direction along a length of arc of a circle formed in a plane perpendicular to said longitudinal axis of said motion control sleeve.7. A latch mechanism comprising:a housing having a first end and a second end, said second end of said housing having an opening; means defining at least an edge within said housing in stationary relationship to said housing; a knob rotationally supported by said housing and having a pair of laterally extending wings, said knob being rotationally movable between a latched position and an unlatched position; a cam having at least one cam slot, said cam being rotatably supported within said housing, said cam being coupled to said knob so as to rotate in response to rotation of said knob; a shaft positioned at least in part within said housing, said shaft extending through said opening in said second end of said housing, said shaft having at least one projection which is engaged at least to said at least one cam slot, said at least one cam slot being configured such that said shaft moves substantially rotationally as said knob is moved from said unlatched position toward said latched position until said projection abuts said edge, thereafter said shaft moving substantially axially as said knob is rotationally moved to said latched position; a lock plug rotationally supported by said knob, said lock plug being movable between locked and unlocked positions; and a slide slidably supported by said knob, said slide moving between a retracted and an extended position responsive to rotation of said lock plug relative to said knob, said slide being in said extended position when said lock plug is in said locked position, and said slide engaging one of said housing and said means defining at least an edge to prevent rotation of said knob when said slide is in said extended position. 8. The latch mechanism according to claim 7, wherein the latch mechanism is adapted for mounting to a closure member, the closure member is a first closure member and cooperates with a second closure member, said housing has a flange at said first end thereof, said housing has an exterior surface having interrupted screw threads formed thereon for engagement by a mounting nut for securing said housing in place when said housing is mounted to one of the first closure member and the second closure member.9. The latch mechanism according to claim 8, wherein said lock plug is of the type having a key access opening and an array of wafers that retract upon insertion of a key to thereby allow rotational motion of said lock plug under the control of a user, wherein said means defining an edge defines at least one motion control slot, said edge being part of said at least one motion control slot, and wherein said knob has means for retaining said lock plug in said locked position that is engaged by said array of wafers when said array of wafers are not retracted.10. The latch mechanism according to claim 9, wherein said cam is substantially in the form of a cylindrical sleeve having a wall thickness, said cam slot extends through said wall thickness of said cam, said cam has a distal end and a proximal end relative to said first end of said housing, said cam has a pair of ears extending from said proximal end thereof, and said knob is adapted to matingly receive said pair of ears of said cam to thereby allow said cam to move rotationally with said knob.11. The latch mechanism according to claim 10, wherein said cam slot has a proximal end closest to said proximal end of said cam and a distal end farthest from said proximal end of said cam, said cam has a longitudinal axis, and said cam slot has a pitch such that the axial distance, measured in a direction parallel to said longitudinal axis of said cam, between said cam slot and said proximal end of said cam increases in the clockwise direction, beginning at said proximal end of said cam slot, as viewed by a viewer facing said proximal end of said cam.12. The latch mechanism according to claim 11, wherein said means defining an edge is a motion control sleeve having at least one motion control slot, said motion control sleeve has a longitudinal axis, said motion control slot has an axial slot portion extending substantially parallel to said longitudinal axis and a circumferential slot portion, said circumferential slot portion being continuous with said axial slot portion and extending from an end of said axial slot portion in a direction along a length of arc of a circle formed in a plane perpendicular to said longitudinal axis of said motion control sleeve.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (8)
Bisbing Robert H. (Springfield PA), Binary coded key and latch-actuator.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.