Composite drain plug

Details Composite drain plug Composite drain plug

1991-09-30

1993-01-05

Lazarus, Ira S.

Lubrication

Automobile crank and gear case service

220304, 277180, 277212F, F16N 3300

Patent

active

051762153

ABSTRACT:
A composite drain plug comprising a metal plug element and an elastomeric seal element. The plug element includes a body with a head portion defined in part by exterior, tool-engaging flank surfaces, a radially enlarged, seal positioning flange with an outer diameter surface and a seal-engaging end face surface. The plug also includes a threaded fastening shank, and a depth stop shoulder with a radial end face surface and an axial offsetting surface. The elastomeric seal element includes a seal body integrally bonded to the positioning flange and to offsetting shoulder surface on said depth stop. The seal body also includes a radially extending, axially inwardly directed end face primary sealing surface, lying axially inwardly of the end face of the depth stop.

REFERENCES:
patent: 1507091 (1924-09-01), Runser
patent: 1634655 (1927-07-01), Elstone
patent: 2769566 (1956-11-01), Thompson
patent: 3843015 (1974-10-01), Blau et al.
patent: 3893487 (1975-07-01), Engelking
patent: 4951783 (1990-08-01), Kamprath et al.

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