Seal and scraper assembly

Details Seal and scraper assembly Seal and scraper assembly

1981-07-24

1983-10-04

Shedd, Wayne L.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277136, 277165, 74459, E21B 3308, F16J 1500, F16J 1516, F16K 4100

Patent

active

044075111

ABSTRACT:
A seal and scraper assembly for a nut and screw actuator has an elastomeric member bonded to a metal ring. The elastomeric member has an annular lip outer portion and a helical thread form inner portion. The inner portion has a plurality of scraper or wiper surfaces interrupting the thread form at an oblique angle and cooperating with a lubricant return surface to direct lubricant, scraped from the screw thread surface, into the housing enclosing the nut and screw actuator. A web portion extends between the outer lip and the inner thread form along the same angle as each scraper surface so that a component of the assembly forces on the outer lip portion are transmitted to the scraper surface so as to increase the thread sealing and scraping forces. The metal ring has a contoured inner surface which is effective to chip ice and other foreign matter from the screw thread outboard of the elastomeric member and a pair of radially extending lugs which cooperate with recesses formed in the nut to prevent relative rotation between the nut and the seal and scraper assembly.

REFERENCES:
patent: 3116931 (1964-01-01), Edwards
patent: 3132719 (1964-05-01), Cole
patent: 3646827 (1972-03-01), Patterson
patent: 3669460 (1972-06-01), Wysong
patent: 4052076 (1977-10-01), Wysong
patent: 4053167 (1977-10-01), Jelinek
patent: 4085942 (1978-04-01), Yoshida et al.
patent: 4226431 (1980-10-01), Jelinek

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