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US 6,045,169 AGranted
Latch bolt set
AssigneeHarrow Products, Inc.
InventorGeorge Frolov
Life of this patent
Estimating the term…
Abstract
A latch bolt set has a latch bolt and a trigger bolt assembly comprising a trigger bolt. The latch bolt has a retracted position, a projected position, an intermediate position and is biased to the projected position. The trigger bolt has a retracted first position, a projected second position, and is biased to the second position. An operator retracts the latch bolt from the projected to the retracted position. The trigger bolt assembly engages with the operator to support the latch bolt in the intermediate position when the trigger bolt is in the second position. When the trigger bolt is moved to the first position, the trigger bolt assembly automatically allows the latch bolt to move to the projected position.
Claims25
A latch bolt set comprising:
- a lock case;
- a latch bolt movably mounted relative to said case and having a retracted position, a projected position, and an intermediate position intermediate said projected and retracted positions;
- latch bolt biasing means for biasing said latch bolt to said projected position;
- trigger bolt means for releasably retaining said latch bolt in said intermediate position, said bolt means comprising a trigger bolt movably mounted to said case and having a retracted first position and a projected second position and a trigger lever operably connected to said trigger bolt;
- trigger bolt biasing means for biasing said trigger bolt to said second position;
- and
- operator means for retracting said latch bolt from said projected position to said retracted position and for engaging with said trigger bolt means, said operator means including a throw rod defining a first end mounting said latch bolt and an opposing second end, said latch bolt biasing means surrounding said throw rod, wherein said operator means supports said latch bolt in said intermediate position when said trigger bolt is in said second position, and when said trigger bolt moves from said second position to said first position, said latch bolt is automatically allowed to move from said intermediate to said projected position.
4 more elements
A doorway assembly comprising:
- a door frame defining a door opening;
- a door strike mounted to said door frame defining a latch bolt opening for receiving a latch bolt and a strike surface;
- a door swingably mounted to said door frame for selectively closing across said door opening and defining a mortise opposite said strike when said door is closed;
- and
- a latch bolt set mounted in said mortise for selectively locking said door to said door frame, comprising:
- latch bolt means having a latch bolt extendable from said door for engagement into said strike opening, said latch bolt having a retracted position wherein said door can be opened, a projected position wherein the latch bolt is engaged into said strike opening when said door is closed, and an intermediate position intermediate said retracted and projected positions;
- latch bolt biasing means for biasing said latch bolt to said projected position;
- a trigger bolt mechanism engageable with said strike surface when said door is in said closed position comprising a trigger bolt having a retracted first position within said door when said door is closed and said trigger bolt engages said strike surface, and a projected second position projecting from said door when said door is open and a trigger lever operably connected to said trigger bolt;
- trigger bolt biasing means for biasing said trigger bolt to said second position;
- and
- operator means for moving said latch bolt between said projected and retracted positions and for engaging with said trigger bolt mechanism, said operator means including a throw rod defining a first end mounting said latch bolt and an opposing second end, said latch bolt biasing means surrounding said throw rod, wherein said operator means supports said latch bolt in said intermediate position when said door is open and said trigger bolt is in said second position, and when said trigger bolt engages said strike surface, said trigger bolt moves from said second position to said first position thereby allowing said latch bolt biasing means to move said latch bolt to said projected position into said strike opening when said door is closed.
8 more elements
A latch bolt set comprising:
- a lock case;
- a latch bolt movably mounted to said case, said latch bolt having a projected position, a retracted position, and an intermediate position intermediate said projected and retracted positions;
- latch bolt biasing means for biasing said latch bolt to said projected position;
- trigger bolt means for releasably retaining said latch bolt in said intermediate position, said trigger bolt means comprising a trigger bolt movably mounted to said case having a retracted first position and a projected second position and a trigger lever operably connected to said trigger bolt;
- trigger bolt biasing means for biasing said trigger bolt to said second position;
- and
- operator means for retracting said latch bolt from said projected position to said retracted position, said operator means comprising a spindle rotatably mounted relative to said case, a lever arm having an end portion fixed to said spindle for motion thereby, and a throw rod having a first end portion connected to said latch bolt and a second end portion engaged by said lever arm, said latch bolt biasing means surrounding said throw rod, so that rotation of said spindle moves said latch bolt between said projected and retracted positions, and wherein said trigger bolt means is engageable with said operator means to support said latch bolt in said intermediate position when said trigger bolt is in said second position, and when said trigger bolt is moved to said first position, said latch bolt is allowed to move to said projected position.
4 more elements
Dependencies are inferred from the claim text.