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US 4,052,076 AGranted
Screw seal
AssigneeSchrillo Company
InventorPaul V. Wysong
Life of this patent
Estimating the term…
Abstract
An improved screw seal for providing a dynamic seal between a screw and a nut is disclosed. A carrier for the screw seal includes a chipper, wiper, and a sealing member. The wiper includes a wiper seal and a drain groove which cooperate to remove lubricants from the surface of the screw and direct them between the nut and screw.
Claims5
A screw seal comprising:
- a generally cylindrical carrier having an interior for engaging a screw;
- a wiper body engaging said carrier;
- a first, second and third spaced-apart parallel lands with arcuate radially inner sections extending radially inwardly into said interior of said carrier from said wiper body, said lands generally parallel to the axis of said carrier;
- a wiper seal disposed between said second and third lands and facing inwardly into said interior of said carrier;
- a drain groove defined between said first and second lands, said groove parallel to the axis of said carrier and extending radially outwardly beyond the inner most surface of said wiper seal;
- whereby when said lands engage a screw, lubricants wiped by said wiper seal flow in said drain groove generally parallel to the axis of such screw, such lubricants may thus be retained within a nut, ball screw, or the like which is coupled to said screw seal;
- and including a sealing member helically disposed within said interior of said carrier from opposite sides of said wiper body.
4 more elements
Dependencies are inferred from the claim text.