Lock capping
First Claim
1. A pin tumbler lock comprisinga lock body having a key plug bore and a plurality of tumbler pin bores extending therefrom,a cap-receiving groove in said body and crossing the outer ends of bores, said groove having undercut sides and overlying side flanges extending toward each other at the sides of the groove, anda cap in said groove having a central portion overlying said pin tumbler bores and having a pair of oppositely extending edge portions, at least one of the edge portions including a side member depending from the central portion to define a distal edge and an offset member extending-outwardly from the distal edge of the side member to engage its companion side flange to retain the cap in place in the groove.
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0 Petitions
Accused Products
Abstract
A utility cylindrical lock set having a series of pin tumbler bores accommodating a plurality of pin stacks and biasing springs is provided with an improved cap. The external surface of a cylindrical lock body includes a cap-receiving groove crossing the open upper ends of the pin tumbler bores. The sides of the groove are undercut to form overlying flanges. An elongated cap having a central portion to overlie the pin tumbler bores and edge portions offset downward from the central portion is receivable within the groove. The edge portions of the cap project oppositely outward to engage the side flanges of the groove to retain the cap in place in the groove. A small recess is formed in one side of the groove. The elongated cap includes a complementary side protrusion to engage the recess to locate the cap against longitudinal movement in the groove. The cap is mounted by engaging one edge of the transversely yieldable cap beneath one side flange and then applying force to the opposite edge to pass the opposite flange and move downward to a position of engagement beneath such flange.
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Citations
17 Claims
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1. A pin tumbler lock comprising
a lock body having a key plug bore and a plurality of tumbler pin bores extending therefrom, a cap-receiving groove in said body and crossing the outer ends of bores, said groove having undercut sides and overlying side flanges extending toward each other at the sides of the groove, and a cap in said groove having a central portion overlying said pin tumbler bores and having a pair of oppositely extending edge portions, at least one of the edge portions including a side member depending from the central portion to define a distal edge and an offset member extending-outwardly from the distal edge of the side member to engage its companion side flange to retain the cap in place in the groove.
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12. A lock comprising
a lock body having a key plug bore and a plurality of pin tumbler bores extending therefrom to an exterior surface of the body, a cap-receiving groove in said surface and crossing said bores, said groove being substantially T-shaped so as to form two opposed lips overlying undercuts, a cap in said groove for closing the outer ends of said bores, said cap having a hat-shaped cross section including tabs engaged beneath the lips of the groove and a central portion offset from the tabs in substantially spaced-apart parallel relation and positioned in the groove to overlie the outer ends of said bores.
Specification