초록 ▼

A two point lock for securing bi-folding windows and doors in which upper and lower shoot bolt arms move in opposite directions from a central lock body upon rotation of a handle. When the arms are in their mutually extended positions, a sliding detent locking member engages the upper shoot bolt arm

A two point lock for securing bi-folding windows and doors in which upper and lower shoot bolt arms move in opposite directions from a central lock body upon rotation of a handle. When the arms are in their mutually extended positions, a sliding detent locking member engages the upper shoot bolt arm to secure the window or door in the closed position. The central lock body includes a rotating driver for the shoot bolt arms that is supported at both ends and is maintained in two different positions by interaction with the curved contact faces of a set of biasing pads.

대표청구항 ▼

1. A two point lock for bi-fold windows and doors, comprising: a central lock body comprising a casing;a handle that is rotatable with respect to the lock body between a first rest position and a second rest position;a rotating driver coupled to the handle for rotation therewith, the driver includin

1. A two point lock for bi-fold windows and doors, comprising: a central lock body comprising a casing;a handle that is rotatable with respect to the lock body between a first rest position and a second rest position;a rotating driver coupled to the handle for rotation therewith, the driver including a pair of opposing members having a gap defined therebetween;first and second shoot bolt arms that move in opposite directions upon rotation of the handle and are maintained in a mutually retracted position when the handle is in the first rest position and in a mutually extended position when the handle is in the second rest position, and wherein each of the first and second shoot bolt arms extends into the gap, a portion of each of the first and second shoot bolt arms that is positioned within the gap between the pair of opposing members being rotably displaceable within the gap via rotation of the driver and pivotably connected to the driver through a corresponding pivot, each pivot having a first end supported by one of the opposing members and an opposite second end supported by the other of the opposing members;a locking member moveable within the casing between a locked position in which the locking member is engaged with the first shoot bolt arm in its extended position, and an unlocked position in which the locking member is unengaged with the first shoot bolt arm; andan actuator for moving the locking member between its locked and unlocked positions when the shoot bolt arms are in their mutually extended position. 2. The lock of claim 1 wherein the locking member is slideable within the casing and yieldingly biased to remain in at least one of the locked position and the unlocked position. 3. The lock of claim 1 wherein the locking member is yieldingly biased to remain in the locked position and the unlocked position by at least one spring biased plunger. 4. The lock of claim 1 wherein the locking member is engaged in a locking slot of the first shoot bolt arm that is elongated in a direction of travel of the first shoot bolt arm. 5. The lock of claim 1 wherein the locking member is engaged in a locking slot of the first shoot bolt arm that extends entirely through the first shoot bolt arm in a direction of travel of the locking member. 6. The lock of claim 1 wherein each shoot bolt arm comprises an arm portion and a linkage, each linkage having a first end that is pivotably coupled to the driver by the corresponding pivot and an opposite second end that is pivotably coupled to the corresponding arm portion. 7. The lock of claim 6 wherein each shoot bolt arm is coupled to opposing portions of the same rotating driver. 8. The lock of claim 7 wherein the rotating driver is rotatably supported in the lock body at two different locations along the rotation axis of the driver. 9. The lock of claim 1 wherein the lock body includes at least one spindle follower that rotates with the handle and at least one biasing device that interacts with the spindle follower to maintain the handle in the first and second rest positions. 10. The lock of claim 9 wherein the at least one biasing device comprises a plurality of biasing pads having curved contact faces that engage with corresponding recesses in the spindle follower. 11. A two point lock for bi-fold windows and doors; comprising: a central lock body;a driver rotatably supported in the lock body at two different locations along the rotation axis of the driver, the driver including a first follower and a second follower offset from the first follower along the rotation axis, wherein opposing faces of the first follower and the second follower face one another such that a gap is located therebetween, and wherein each of the first follower and the second follower is rotatably supported at a corresponding one of the two different locations along the rotation axis;at least one biasing pad that interacts with the driver to maintain the driver in a first rest position and a second rest position; andfirst and second shoot bolt arms that move in opposite directions upon rotation of the driver and are maintained in a mutually retracted position when the driver is in the first rest position and in a mutually extended position when the driver is in the second rest position, wherein each of the shoot bolt arms extends into the gap and is pivotally connected to each of the first follower and the second follower via a corresponding and respective pivot, each pivot having a first end portion pivotably supported by the first follower and a second end portion pivotably supported by the second follower. 12. The lock of claim 11 wherein the at least one biasing pad has a curved contact face that engages with at least one recess in the driver. 13. The lock of claim 11 wherein a plurality of biasing pads contact the first follower and the second follower at different locations along the rotation axis of the driver. 14. The lock of claim 11 wherein a plurality of biasing pads contact the driver at opposing radial positions. 15. The lock of claim 11 wherein the lock body includes a first set of stops which contact the driver in the first position so as to prevent further rotation of the driver in a first direction. 16. The lock of claim 15 wherein the lock body includes a second set of stops which contact the driver in the second position so as to prevent further rotation of the driver in a second direction. 17. The lock of claim 1, wherein the actuator is operated by a key. 18. The lock of claim 1, wherein the opposing members are rotationally coupled for joint rotation with one another. 19. A lock, comprising: a central lock body comprising a casing;a handle that is rotatable with respect to the lock body between a first rest position and a second rest position;a rotating driver coupled to the handle for rotation therewith, the driver including a first follower and a second follower, wherein the first follower and the second follower are offset from one another along a rotational axis of the driver such that an annular gap is formed between the first follower and the second follower, and wherein each of the followers includes a first recess and a second recess;first and second shoot bolt arms that move in opposite directions upon rotation of the handle and are maintained in a mutually retracted position when the handle is in the first rest position and in a mutually extended position when the handle is in the second rest position, wherein each shoot bolt arm includes a corresponding and respective end portion that is positioned in the annular gap such that the end portion is captured between the first follower and the second follower, wherein each of the end portions is pivotally connected to each of the drivers via a corresponding and respective pivot pin that extends between the followers, each pivot pin having a first end portion supported by the first follower and a second end portion supported by the second follower;a biasing mechanism comprising a plurality of biasing pads including a first biasing pad and a second biasing pad, wherein each of the biasing pads includes a curved contact face;wherein with the handle in the first rest position, the curved contact faces of the first biasing pad and the second biasing pad are engaged with the first recesses such that the biasing mechanism resists rotation of the handle from the first rest position; andwherein with the handle in the second rest position, the curved contact faces of the first biasing pad and the second biasing pad are engaged with the second recesses such that the biasing mechanism resists rotation of the handle from the second rest position. 20. The lock of claim 19, wherein the first recesses of the first follower and the second follower are aligned with one another, wherein the second recesses of the first follower and the second follower are aligned with one another, and wherein the first biasing pad and the second biasing pad are offset from one another along the rotational axis such that the first biasing pad is aligned with the first follower and the second biasing pad is aligned with the second follower. 21. The lock of claim 20, wherein each of the followers further includes a third recess diametrically opposite the first recess and a fourth recess diametrically opposite the second recess; wherein the plurality of biasing pads further includes a third biasing pad and a fourth biasing pad, wherein the third biasing pad and the fourth biasing pad are offset from one another along the rotational axis such that the third biasing pad is aligned with the first follower and the fourth biasing pad is aligned with the second follower;wherein with the handle in the first rest position, the curved contact faces of the third biasing pad and the fourth biasing pad are engaged with the third recesses such that the biasing mechanism resists rotation of the handle from the first rest position; andwherein with the handle in the second rest position, the curved contact faces of the third biasing pad and the fourth biasing pad are engaged with the fourth recesses such that the biasing mechanism resists rotation of the handle from the second rest position. 22. The lock of claim 19, further comprising a locking member for selectively locking the first and second shoot bolt arms in the mutually extended position. 23. The lock of claim 22, wherein the first shoot bolt arm includes a locking slot that extends entirely through the first shoot bolt arm in a direction of travel of the locking member, and wherein the locking member engages the locking slot to lock the first and second shoot bolt arms in the mutually extended position. 24. The lock of claim 19, wherein the first follower and the second follower are rotationally coupled with one another for joint rotation about the rotational axis. 25. The lock of claim 19, wherein the first follower and the second follower are of identical construction.