Jacob S Schade

US Patent:

20100050523, Mar 4, 2010

Filed:

Aug 10, 2009

Appl. No.:

12/462843

Inventors:

James M. Helms - Fort Myers FL, US
Jacob S. Schade - Apollo PA, US
Craig I. Fiedor - Lower Burrell PA, US

International Classification:

E05F 15/10

US Classification:

49 26

Abstract:

A safety release mechanism for use with a ball screw type linear motor, featuring a lock lever that can be manually engaged or disengaged. Engaging the lock lever rigidly fixes a telescoping arm, allowing the motor to retract or extend the arm into a cover tube. Disengaging the lock lever allows the telescoping arm to rotate freely in the cover tube. One embodiment of the safety release mechanism is used with a motorized door assist mechanism, however, the release mechanism has many applications beyond a door opener, and can be used in any application requiring a linear motor with a telescoping arm, where in order for the motor to extend or retract the arm, one end of the arm must be fixedly held in place.