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US 12,631,050 B2Granted
Push pad exit device for emergency door egress and vertical latch bolt assembly
AssigneeC.R. Laurence Co., Inc.
InventorsMirjana Komadina, Gary Sprague
Life of this patent
Estimating the term…
Abstract
A push pad exit device comprising a horizontal push bar actuator mechanically linked to a vertical door handle assembly for use on the interior side of entrance doors where a means of emergency egress is desired, is presented. The operating mechanisms of the push bar actuator and vertical door handle assembly are concealed presenting a smooth uncluttered appearance. The push pad exit device further including an improved roller latch bolt. The improved roller latch bolt allows for a roller to make contact with a ramp surface of a corresponding strike plate on a sweep side of the plate and allows for the roller support to make contact with the strike plate on a latch side of the plate.
Claims12
A push pad exit device for mounting on a door, comprising:
- a push pad actuator mounted horizontally on a surface of the door;
- a latching mechanism mounted vertically on the surface of the door;
- the latching mechanism operable to cause a latch bolt assembly having a latch bolt to engage and disengage with a latching recess in a door frame to transition the door between a first latched position and a second unlatched position;
- the latching mechanism comprising a motion transfer link, a lever arm, and an over-center link, the motion transfer link, lever arm and over-center link being in mechanical connection and having first positions corresponding to the first latched position and second positions corresponding to the second unlatched position;
- the push pad actuator having an actuator arm pivotally connected to a housing mounted on the door at one end and engageable at a free end with the motion transfer link of the latch assembly, the actuator arm having a first position corresponding to the first latched position and a second position corresponding to the first unlatched position;
- wherein the motion transfer link converts horizontal motion from the push pad actuator into vertical motion in the latching assembly;
- wherein the latch bolt assembly biases the actuator arm and latching mechanism to the first latched position;
- wherein the application of inwardly directed force to the actuator arm biases the actuator arm and the latching assembly to the second unlatched position;
- wherein the motion transfer link and lever arm have lower and upper link ends and the over-center link has three connection points, wherein the lower link end of the motion transfer link engages a connecting tongue of the actuator arm and wherein the upper link end of the motion transfer link engages the lower link end of the lever arm, wherein the upper link end of the lever arm engages a first connection point of the over-center link;
- a second connection point of the over-center link engaging the latch bolt assembly and wherein a third connection point of the over-center link engages a surface;
- and
- wherein the latch bolt is a roller latch bolt, comprising a latch bolt body having a roller support, a roller of the roller latch bolt being rotatably connected to the roller support.
9 more elements
A push pad exit device for mounting on a door, comprising:
- a push pad actuator arm oriented horizontally;
- means for moving the push pad actuator arm from a locked position to an unlocked position;
- a latching mechanism having a locked and an unlocked position, the latching mechanism being oriented vertically on the surface of the door;
- the latching mechanism including a motion transfer link that interconnects the latching mechanism with the free end of the push pad actuator arm, wherein the motion transfer link converts horizontal motion from the push pad actuator arm into vertical motion in the latching assembly;
- a latch bolt assembly, the latch bolt assembly including a biasing spring that biases the push pad actuator arm and latching mechanism to their locked positions;
- and
- wherein the application of a horizontally directed force to the push pad actuator arm overcomes the biasing force applied by the latch bolt assembly to move the push pad actuator arm and the latching mechanism to their unlocked positions;
- wherein the means for moving the push pad actuator arm from a locked position to an unlocked position comprises a parallel linkage assembly;
- wherein the parallel linkage assembly comprises first and second parallel links having first and second ends, the second end of the first parallel link connected to a first end of a connecting rod, and the second end of the second parallel link connected to a second end of the connecting rod, wherein the first ends of the first and second parallel links are connected to the door;
- and
- wherein the latch bolt assembly includes a roller latch bolt, comprising a latch bolt body having a roller support, a roller of the roller latch bolt being rotatably connected to the roller support.
8 more elements
Dependencies are inferred from the claim text.