Back to results
US 3,935,614 AGranted
Electromechanical door holder-closer
AssigneeEmhart Inc.
InventorsRobert John Pannone, Walter Edward Surko, Jr.
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeEmhart Inc.
InventorsRobert John Pannone, Walter Edward Surko, Jr.
Estimating the term…
An electromechanical door holder-closer includes a conventional door closer which has a shaft rotatable in response to movement of a door between its open and closed positions and resilient means for yieldably resisting rotation of the shaft in one direction. A latching mechanism cooperates in a latching position with a uni-directional clutch mounted on the shaft to permit free movement of the door from its closed position toward its open position and to releasably retain the door in a selected hold-open position therebetween when the latching mechanism is held in cooperative engagement with the clutch. The latching mechanism is releasably retained in its latching position by a normally energized electrically operated holding mechanism. Means may be provided for adjusting the device from one hold-open position to another hold-open position of lesser opening by manually moving the door toward its closed position and to its new hold-open position while the latching mechanism is held in latched position by the holding mechanism. Means is also provided for overriding the latching and holding mechanism to release the door from its hold-open position in response to manual force applied thereto in the closing direction.
A holder-closer for a door member mounted for pivotal movement between open and closed positions relative to a frame member and comprising a casing for mounting in fixed position relative to one of the members, a spindle journalled in said casing for axial rotation in one and an opposite direction relative thereto and projecting therefrom, resilient means yieldably resisting rotation of said spindle in said one direction, dampening means contained in said casing for yieldably resisting rotation of said spindle in said opposite direction in response to reactive torque applied to said spindle by said resilient means to control the closing speed of the door, arm means connected to said spindle externally of said casing for connection to the other of the members to rotate said spindle in said one direction when the door is opened, a clutch, means for coupling one part of said clutch to said spindle externally of said casing for rotation with said spindle in said one and said opposite direction, latching means supported for movement relative to said casing between latching and releasing position and engaging another part of said clutch in said latching position to retain said other part against rotation relative to said casing, said one part being rotatable in said one direction with said spindle and arm means and relative to said other part when said latching means is in its latching position and the door is opened to a hold-open position, said other part cooperating with said one part to restrain said one part against rotation in said opposite direction in response to said reactive torque while said door is in its hold-open position and said latching means is in its latching position, and electrically operated holding means for releasably retaining said latching means in its latching position.
The combination comprising a door closer for mounting between a door member and a frame member, and a hold-open attachment, said door closer having a casing for mounting on one of the members, a spindle rotatably supported in said casing and projecting therefrom, means for connecting said spindle to the other of said members to rotate in one direction in response to movement of said door toward its open position and to rotate in an opposite direction in response to movement of said door toward its closed position, and resilient means in said casing yieldably resisting rotation of said spindle in said one direction, said hold-open attachment having a frame for mounting on said one member in fixed relation to said casing, a uni-directional clutch having one part free to rotate in only one direction relative to another part thereof, means for coupling said one part to said spindle, latching means supported on said frame for movement relative thereto between latching and releasing positions, said latching means cooperating with said clutch in said latching position for releasably retaining said other part against movement relative to said frame to permit said spindle to rotate in said one direction with said one part and to resist rotation in said other direction in response to torque applied thereto by said resilient means, and electrically operated holding means for releasably retaining said latching means in said latching position.
A hold-open attachment for a door closure for connection between a door and an associated door frame and having a casing, a spindle rotatably supported in said casing and projecting therefrom and rotatable in one direction in response to movement of the door toward an open position and in an opposite direction in response to movement of the door toward a closed position, and resilient means in said casing for yieldably resisting rotation of the spindle in said one direction, said attachment comprising an attachment frame for mounting in fixed position relative to said casing, a clutch, means for coupling said clutch to said spindle externally of said casing for rotation therewith, latching means mounted on said attachment frame and movable relative thereto between latching and releasing positions, said latching means cooperating with said clutch in said latching position to retain a part of said clutch in fixed position relative to said frame to permit said spindle to rotate in said one direction in response to movement of the door to a hold-open position and to resist rotation of said spindle in said other direction in response to torque applied to said spindle by said resilient means to retain the door in hold-open position, and electrically operated holding means for releasably retaining said latching means in said latching position.
Dependencies are inferred from the claim text.