Ned Rudolph Urschel

US Patent:

6510587, Jan 28, 2003

Filed:

May 14, 2001

Appl. No.:

09/853696

Inventors:

Ned R. Urschel - Lexington KY
Wilbur Bewley - Nicholasville KY
Gary Murphree - Annandale VA

Assignee:

Sargent Greenleaf, Inc. - Nicholasville KY

International Classification:

E05F 504

US Classification:

16 83, 16 82, 292342, 292DIG 4

Abstract:

A door closure preventing device is mounted on the inside surface of a door and has a pivotal stop moveable between a deactivated position within the periphery of the door and the extended position extending beyond the periphery of the door to prevent closure of the door. The pivotal stop is moved to its extended position following opening of the door by a user and is then released to move by a spring to an intermediate position projecting beyond the door periphery following which closure of the door results in engagement of the door jamb by the stop to prevent complete closure. Engagement of the stop with the door jamb also returns the stop to is fully extended position and actuates a rotary latch so that upon subsequent opening movement of the door by the user the stop is automatically returned to its fully retracted position to permit a conventional door closure apparatus to fully close the door.

US Patent:

61960373, Mar 6, 2001

Filed:

Jul 27, 1998

Appl. No.:

9/122785

Inventors:

Ned Urschel - Lexington KY
Cedric Cuenot - Le Locle, CH
Christophe Dexet - Thiebouhans, FR
Jacques Wicht - Bienne, CH

Assignee:

Sargent & Greenleaf, Inc. - Nicholasville KY

International Classification:

E05B 4702

US Classification:

70416

Abstract:

A dead bolt lock automatically blocks the extended bolt to prevent externally-applied force from thrusting the bolt back into the lock case, and in the event of physical attack the lock responds by prolonging or perpetuating the dead bolt blocking condition. A push-pull lock has a bolt whose motion in both directions is stopped in response to detection of a rise in motor current above a certain level: a cushioning arrangement allows the current-limiting feature to be implemented without risk of damage to the motor, gear teeth or other drive components. A re-locker arrangement includes an angled flange that is part of a motor-supporting bracket; when forcibly pressed, the flange breaks plastic pins to release a spring-biased re-locker wire to block the bolt from being withdrawn, and when the wire is in the dead bolting position an extension of the re-locker wire engages a ridge in the lock's case to prevent the re-locker from being manipulated back to its original position. Either lock can control the position of a bolt works blocking element that selectively engages a lever-driven mechanism that blocks and unblocks the door from being opened. A sensor switch, especially for use on the push-pull lock, tells the lock when the mechanism is in a secured position, so that the lock is automatically re-locked and the user does not have to manually extend the bolt.