Door handle modular return spring cage assembly

Details Door handle modular return spring cage assembly Door handle modular return spring cage assembly

E - Fixed Constructions

05

B

E05B 15/04 (2006.01) E05B 63/00 (2006.01)

Patent

CA 2177550

A modular return spring cage assembly for door lock handles, consists of a door lock mounting chassis member having two opposed faces, at least one face having two opposed arcuate channels forming a circular groove in the face. The groove has two split diametrically opposed spring bases each formed by two substantially equal spring stops projecting from radially outer and radially inner walls of the groove. Two compression springs are slidably disposed within the channels and have length such that a slight compression is required to fit the springs between the split spring bases. An arrangement for transmitting torsional motion between the two compression springs simultaneously and a door handle, and for limiting rotary motion of the handle is included. A provision for positively retaining the springs and the torsional motion transmission arrangement on the mounting chassis member completes the modular assembly. When so assembled, the spring cage module can be easily installed in or removed from a door preparation; and, because of its modularity, it may be designed to be reversible to provide enhanced tamper resistance. 17

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