Spring cage assembly

Details Spring cage assembly Spring cage assembly

2006-05-02

2006-05-02

Estremsky, Gary (Department: 3676)

Closure fasteners

Operators with knobs or handles

C292SDIG006

Reexamination Certificate

active

07036856

ABSTRACT:
A spring cage assembly that includes a housing, a plurality of springs, and a drive spindle. The housing includes a centrally located opening and a plurality of housing tabs located radially around the opening underneath the housing. The plurality of springs are biased against the housing tabs. The drive spindle includes a first and a second end. The first end extends through the opening for connection to a door lever. The second end is integral with a torque plate having a plurality of plate tabs. The plate tabs compress the springs against the housing tabs in biasing rotation of the drive spindle.

REFERENCES:
patent: 2729485 (1956-01-01), Schlage
patent: 4911489 (1990-03-01), Hansen et al.
patent: 4998760 (1991-03-01), Nixon et al.
patent: 5265924 (1993-11-01), Kim
patent: 5286074 (1994-02-01), Lin
patent: 5590555 (1997-01-01), Kester et al.
ST Series, website article from PDQ Locks dated Nov. 8, 2002.

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