US 4,069,693 A · Cylinder lock assembly

Abstract

A cylinder lock assembly includes a tubular housing rotatably receiving therein an elongated unitary barrel having a configuration suitable for single step diecast fabrication without the extremely complex coring and secondary operations heretofore required. The barrel contains a plurality of easily diecast and assembled, open sided tumblers in face to face sliding engagement, each of which is individually engaged by a finger of a unitary, multi-fingered resilient member for urging the respective tumbler into a locked position until displaced by a key moved transversely through a slot formed in each tumbler. Modified forms include a dust door receiving cavity which has a dust cover integral with the barrel and a dust door closing spring integral with the tumbler contacting resilient member. Also, simplified structures are provided to retain the barrel in the housing.

Claims15

Dependent claims

A lock assembly comprising:

a. a housing having a bore therein,
b. a barrel rotatably received in said bore,
c. walls in said barrel defining a tumbler slot,
d. a plurality of key receiving tumblers in said tumbler slot and respectively positioned in face to face sliding relation with at least one adjacent tumbler;
said tumblers substantially filling said tumbler slot and at least partially defining a key receiving slot, said tumblers being generally "C" shaped whereby said key receiving slot is open sided,
e. a key guide projecting from one of said barrel walls and extending along and within said key receiving slot, interruptions positioned along said key guide, providing relief for insertion of said tumblers into said barrel past said key guide, and
f. resilient means contacting said barrel and having arms resiliently engaging said tumblers.

4 more elements

Dependencies are inferred from the claim text.

Cylinder lock assembly

Life of this patent

Cylinder lock assembly

Life of this patent

Abstract

Claims15