US4052076A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screw seal
Assignee: SCHRILLO Co
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Filing: 1976-06-28
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Granted: 1977-10-04
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Expires: 1996-06-28
Abstract
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.
Inventors
- 👤 Paul V. Wysong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:11
CPC Classifications
F; F16; F16H; F16H25/00; F16H25/18; F16H25/20; F16H25/24; F16H25/2418; F16J; F16J15/00; F16J15/16; F16H25/22; F16H25/2204; Y; Y10; Y10S; Y10S277/00; Y10S277/911; Y10T; Y10T74/00; Y10T74/18; Y10T74/18568; Y10T74/18576; Y10T74/18712
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
175 words
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.
Claim 2
Dependent Claim
175 words
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.
Claim 3
Dependent Claim
24 words
The screw seal defined by claim 1 wherein said wiper seal includes a transverse section which extends across one end of said drain groove.
Claim 4
Dependent Claim
13 words
The screw seal defined by claim 2 wherein said wiper seal comprises polyurethane.
Claim 5
Dependent Claim
18 words
The screw seal defined by claim 3 wherein the exterior of said carrier includes a layer of tetrafluoroethylene.
Claim 6
Dependent Claim
33 words
The screw seal defined by claim 1 wherein said wiper body includes additional spaced-apart parallel lands and at least one additional wiper seal, said additional lands defining at least one additional drain groove.
References Cited (Backward Citations)
US2757548A
Cited
US3116931A
Cited
US3304794A
Cited
US3678776A
Cited
US3669460A
Cited
US3851541A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-10-03 | 1981-04-04 | 1981-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-03 | 1985-04-04 | 1985-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-03 | 1989-04-04 | 1989-10-04 | $7700.00 | Window Closed / Lapsed |