Cylindrical lockset

Details Cylindrical lockset Cylindrical lockset

1992-10-16

1994-08-09

Lindsey, Rodney M.

Closure fasteners

Bolts

Sliding

2923363, E05C 112

Patent

active

053359488

ABSTRACT:
A cylindrical lockset (20) includes an inside subassembly (22) and an outside subassembly (24) which are assembled with a door (208). Each subassembly (22, 24) includes a liner (26, 36), a rose (28, 38) and a lever (30, 40). A chassis assembly (58) includes a pair of sleeves (66, 68), a pair of spring plates (146, 192), a pair of torsion springs (166, 194), a cap (172), a case (182) and a retractor (70) which is coupled to the latchbolt (46). Upon operation of either of the levers (30, 40) from a non-operated or home position, the latchbolt (46) is retracted and the associated one of the springs (166, 194) is tensioned so that, upon release of the levers, the springs return the levers to the home position.

REFERENCES:
patent: 1653512 (1927-12-01), Schlage
patent: 2470770 (1949-05-01), Harvey
patent: 2470771 (1949-05-01), Harvey
patent: 3954292 (1976-05-01), Johnson
patent: 4042268 (1977-08-01), Coglan
patent: 4123097 (1978-10-01), Allemann
patent: 4202575 (1980-05-01), Bates
patent: 4453753 (1984-06-01), Fayerman et al.
patent: 4569547 (1986-02-01), Fayerman et al.
patent: 5123682 (1992-06-01), Robida et al.

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