Locks are installed on sliding doors to lock the door to the door frame for security purposes. Typically, sliding door locks include one or more locking elements in the form of hooks that may be pivoted into an associated keeper or strike on the door. Typically, these locking elements are disposed within a lock housing when unlocked and extend from the housing when locked. Additionally, the locking elements are disposed proximate a center of the door height. Such placement is generally well-known by intruders, who often concentrate their breaching efforts against the center of the door to defeat the lock. Additionally, single hook sliding door locks can often be defeated by lifting the door from its sliding track and pulling the hook out of the keeper.
The technology described herein is a high strength, secure sliding door lock with one or more locking points. Each locking mechanism has opposing hooks with a hook block between the hooks for exceptionally high locking strength and security. A single separate lock operator between the individual locks operates the lock system.
In one aspect, the technology relates to a sliding door lock system having: a centrally-disposed operator having: a casing; a trigger retractably extending from the casing; and an operator mechanism disposed in the casing and operatively engaged with the trigger; a lock disposed remote from the operator, the lock having: a housing; a pair of opposed locking hooks extending from the housing; and a spring biasing each of the pair of opposed locking hooks into an unlocked position; and a block pivotably connected to the housing, wherein the block is configured to engage the pair of opposed locking hooks when the pair of opposed locking hooks are in a locked position; and an elongate member operably connecting the operator mechanism to the block. In an embodiment, the pair of opposed locking hooks each includes a contact face configured to contact a strike so as to pivot each of the pair of opposed locking hooks into the locked position. In another embodiment, the lock further includes a block spring configured to bias the block into an engaged position where the block engages the pair of opposed locking hooks while in the locked position. In yet another embodiment, the lock further includes a release lever configured to oppose a force generated by the block spring, so as to hold the block in a disengaged position. In still another embodiment, the elongate mechanism is a tension member configured to be substantially slack when the lock is in the locked position and configured to be substantially taut when the lock is in the unlocked position.
In another embodiment of the above aspect, the operator mechanism includes: at least one rack; and a rotatable element engaged with the rack, wherein a rotation of the rotatable element moves the at least one rack between a first position and a second position. In another embodiment, the operator mechanism further includes a take-up mechanism connecting the at least one rack to the elongate member. In yet another embodiment, the take-up mechanism further includes a spring-controlled linkage.
In another aspect, the technology relates to a lock having: a housing; a pair of opposed locking hooks extending from the housing, wherein the pair of opposed locking hooks each include a contact face configured to contact a strike so as to pivot each of the pair of opposed locking hooks into a locked position; and a spring biasing each of the pair of opposed locking hooks into an unlocked position. In an embodiment, the lock further includes: a block pivotably connected to the housing, wherein the block is configured to engage the pair of opposed locking hooks in the locked position. In another embodiment, the pair of opposed locking hooks each includes a detent for receiving at least a portion of the block. In yet another embodiment, a release lever is configured to pivot so as to move the block from an engaged position to a disengaged position. In still another embodiment, a pivoting movement of the release lever is controlled by an elongate element extending into the housing from an exterior of the housing.
In another embodiment of the above aspect, a pivoting movement of the release lever is controlled by a motor disposed within the housing. In an embodiment, the lock further includes the motor.
In another aspect, the technology relates to a lock system having: a casing; and an operator mechanism disposed in the casing; a first housing disposed remote from the casing; a lock mechanism disposed in the first housing; and a pair of first opposing hooks extending from the first housing in both an unlocked position and a locked position, wherein each of the pair of first opposing hooks each includes a contact face configured to engage a strike so as to pivot each of the pair of first opposing hooks from the unlocked position to the locked position. In an embodiment, the lock system further includes a block configured to releasably engage a detent in each of the pair of first opposing hooks so as to secure the pair of first opposing hooks in the locked position. In another embodiment, the block is movable based on an actuation of the operator mechanism. In yet another embodiment, the lock system further includes a tension element, wherein the actuation of the operator mechanism transfers movement to the block via the tension element. In still another embodiment, the lock system further includes a motor, wherein the actuation of the operator mechanism sends a signal to the motor.
There are shown in the drawings, embodiments which are presently preferred, it being understood, however, that the technology is not limited to the precise arrangements and instrumentalities shown.
The design geometry of the proposed dual hooks is significantly different than the geometries normally used for lock mechanisms for sliding doors. For example, current sliding door locks have weak pivoting single-point hooks for locking. The present lock utilizes, in certain examples, stronger dual hooks, larger diameter rivet pins, a robust hook blocking mechanism, and adjustable engaging lock strikes.
The centrally-located lock operator that controls the remote dual hook locks is designed to release the individual locks above and below the lock operator by disengaging a locking block from engagement with the latched hooks. In an example, the operator releases the locks with a spring-loaded mechanism that pulls a tension member to each lock. The spring-loaded mechanism may be configured for over-travel, which simplifies lock installation, adjustment, and release timing. The dual hooks on each lock engage individual frame-mounted strikes when the door is closed, causing them to rotate and wrap around each frame-mounted strike. Lock release adjustments can be adjusted from the edge of the door panel without removing the lock system from the door panel. The lock operator may be controlled by an interior rotating handle or standard thumb turn and key cylinder mounted on typical sliding door hardware. Rotating sliding door handles are described in U.S. Patent Application Publication No. 2013/0334829, the disclosure of which is hereby incorporated by reference herein in its entirety. Alternatively, the lock hooks may be pivoted by a motor that is signaled to operate as described herein.
As the door is unlocked, the rotating handle (or thumb turn or key) turns the operating cam pinion in the lock operator by, in certain embodiments, 70 degrees to the unlocked position. In other embodiments, the cam may rotate by, e.g., 90 degrees to the unlocked position. Other angles of rotation are contemplated. The lock operator pulls taut the tension members between the operator and each lock. As the tension member tightens, the hook block rotates out of position, releasing the hooks and unlocking the door. With the tension members taut and the hook block retracted, the door can be pulled away from the frame such that the dual locks automatically unlatch.
When the door is closed, the trigger release on the lock operator contacts the frame. Additionally, the opposing hooks at each lock contact the frame strikes and pivot so as to wrap around the strike in the locked position. Once in the closed position, the operator cam pinion in the lock operator is rotated so as to lock the door. Rotation may be performed by the rotating handle, thumb turn, or the key. The operation of the various components is described below and depicted in the accompanying figures.
The operator mechanism 112 is controlled by and includes an operating cam pinion 114. One example of a particular configuration of the operator mechanism 112 is depicted below, which receives input from a rotating handle, thumb turn, or key, as well as the release trigger 116. The operating mechanism 112 moves a spring-loaded take-up mechanism 152 to extend or retract one or more elongate members 128. In examples where the elongate members 128 are tension members (such as cables, wires, or chains), the spring-loaded take-up mechanism 152 may tighten or loosen the tension members 128. The release trigger 116 enables actuation of the operator mechanism 112 (more specifically, actuation of the operating cam pinion 114, as described below). The release trigger 116 projects out of the casing face plate 111. When the door D is closed, the release trigger 116 rotates into a position allowing the rack 148 to extend. If the door D is open, the release trigger 116 restricts the motion of the rack 148, thus preventing rotation of the operating cam pinion 114. The release trigger 116 prevents the operator mechanism 112 from functioning when the door D is open. As such, the release trigger 116 acts as an anti-slam device, preventing the hooks 122 from being actuated into a closed position when the door D is open.
One or more locks 108 are disposed remote from the lock operator 106. Each lock 108 includes a housing 118 that contains a lock mechanism (depicted generally as 120). A pair of pivoting hooks 122 project from the housing 118 in both the unlocked and latched/locked positions (as depicted in
In the depicted example, the casing 110 is discrete from the housings 118 and the elongate member 128 is disposed within a slot 130 formed in the door D that may be covered by a face plate 132. This configuration allows the lock system 100 to be field-modified to be fitted into doors D having differing heights. In other examples, the lock system 100 may be disposed in a single housing (that is, the casing 110 and housings 118 may be integrated into a single housing). In such a case, the operator mechanism 112 is still disposed remote from the lock mechanism 120, in that the two mechanisms are connected by elongate members 128.
In addition to the embodiments of the lock depicted herein, other embodiments having one or more locks actuated by a single lock operator are contemplated. For example, a single lock and a single lock operator may be used on a door. Alternatively, multiple locks and one or more lock operators can be utilized. It is contemplated that the various components and configurations depicted with regard to the locks disclosed herein, as well as modifications thereof envisioned by a person of ordinary skill in the art, are interchangeable.
The various elements of the locks depicted herein may be manufactured of any materials typically used in door hardware/lock manufacture. Such materials include, but are not limited to, cast or machined steel, stainless steel, brass, titanium, etc. Material selection may be based, in part, on the environment in which the lock is expected to operate, material compatibility, manufacturing costs, product costs, etc. Additionally, some elements of the lock may be manufactured from high-impact strength plastics. Such materials may be acceptable for applications where robust security is less critical, or when a secondary, stronger material is utilized in conjunction with the plastic part.
While there have been described herein what are to be considered exemplary and preferred embodiments of the present technology, other modifications of the technology will become apparent to those skilled in the art from the teachings herein. The particular methods of manufacture and geometries disclosed herein are exemplary in nature and are not to be considered limiting. It is therefore desired to be secured in the appended claims all such modifications as fall within the spirit and scope of the technology. Accordingly, what is desired to be secured by Letters Patent is the technology as defined and differentiated in the following claims, and all equivalents.
This application claims priority to and the benefit of U.S. Provisional Application Ser. No. 62/064,859, filed Oct. 16, 2014, the disclosure of which is hereby incorporated by reference herein in its entirety.
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