Live bolt latching and releasing system
AssigneeJohn D. Bush & Co., Inc.
InventorsDouglas E. Shaffer, Leland E. Emery
Life of this patent
Estimating the term…
Abstract
A latching system for live bolts as in a door retains the live bolts within the door until the door is closed. A latch holds a live bolt link against travel that would insert the live bolts into the door body jamb until a link lifter forces the link out if the latch against the bias of a hold-down spring. The link lifter can take the form of an inclined surface on a cam mounted on the hinge side of the door. The cam engages the door body jamb as the door closes and travels into the door until the link lifter engages and lifts the link out of the latch.
Claims31
In a door mounted in a jamb, a live bolt latching system comprising:
- a. a latch substantially fixed relative to a rear surface of the door,
- b. a live bolt link selectively engaged and retained by the latch, the live bolt link being drivingly connected to a door handle, the latch preventing insertion of a live bolt operatively connected to the live bolt link from being inserted into the jamb when the link is retained thereby;
- c. a hold-down spring biasing the link into the latch;
- d. a cam that engages the jamb and slides into the door when the door is closed;
- and
- e. a link lifter that engages and forces the link out of the latch when the cam travels a predetermined distance toward the link.
In a door swingablly mounted in a jamb, a live bolt latching system comprising:
- a. an actuator mounted on the door and responsive to motion of the door by virtue of a portion of the actuator that engages the jamb when the door is closed;
- b. a latch mounted on the door and substantially fixed relative to a rear surface of the door;
- c. a spring biasing a live bolt link into the latch when the link overlies the latch such that the latch prevents the link from forcing a live bolt into the jamb in response to a bias imposed by another spring biasing the link toward the jamb;
- and
- d. a link lifter responsive to operation of the actuator to overcome the bias of the spring and disengage the live bolt link from the latch when the door is closed.
The latching system mounted to a swinging in a door comprising:
- a. a latch receiving a link in response to actuation of a handle, the latch being substantially fixed relative to a rear surface of the door and retaining the link via a force imposed by a resilient body biasing the link into the latch;
- b. an actuator that engages a iamb of the door when the door is closed and, by virtue of its engagement with the jamb, overcomes the force and releases the link from the latch when the door is fully closed;
- and
- c. a live bolt on the link that is automatically inserted into a jamb when the door is closed and the link is released from the latch.
Dependencies are inferred from the claim text.