Cylindrical lockset with reinforced chassis assembly

Details Cylindrical lockset with reinforced chassis assembly Cylindrical lockset with reinforced chassis assembly

1996-12-17

1998-04-07

Wilson, Neill R.

Closure fasteners

Bolts

Sliding

2923363, 292DIG61, E05C 112, E05B 300

Patent

active

057355568

ABSTRACT:
A cylindrical lockset includes a latchbolt unit, a chassis assembly, a pair of spring cassettes and a pair of levers. The chassis assembly has a housing, a retractor disposed in the housing and connected operably to the latchbolt unit, and a pair of rollback sleeves extending from opposite sides of the housing. Each of the rollback sleeves includes a tubular body which is formed from a bent steel plate with adjoining longitudinal edges and which has a front end coupled operably with the retractor. Each of the spring cassettes is coupled operably to a respective one of the rollback sleeves. Each of the levers is mounted on a respective one of the rollback sleeves. The chassis assembly further includes a reinforcing ring sleeved on the front end of the tubular body of at least one of the rollback sleeves to force the adjoining longitudinal edges of the tubular body toward each other to prevent prying open of the rollback sleeve.

REFERENCES:
patent: 4756178 (1988-07-01), Shen
patent: 4998760 (1991-03-01), Nixon et al.
patent: 5335948 (1994-08-01), Norton, II et al.
patent: 5628216 (1997-05-01), Qureshi et al.

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