Patent US4118256A successfully refreshed from Google Patents.
Patent US4458717A successfully refreshed from Google Patents.
US4458717A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cylinder cushion seal
Assignee: Eaton Aeroquip LLC
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Filing: 1983-03-14
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Granted: 1984-07-10
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Expires: 2003-03-14
Abstract
Abstract A synthetic plastic cushion seal for an expansible chamber motor usable with either an air or oil pressurized medium, the seal having reduced friction characteristics, being of a concise configuration and utilizing radial and axial channels to facilitate medium flow during pressurization of the associated motor chamber.
Inventors
- 👤 John D. Boland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:57
CPC Classifications
F; F15; F15B; F15B15/00; F15B15/20; F15B15/22; F15B15/223; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7783; Y10T137/7837; Y10T137/7904
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
134 words
A cushion seal for an expansible chamber motor comprising an annular body of elastomeric material having an axis, an inner bore, a circumference, a first radial face and a second radial face, said faces defining the seal body axial dimension and said bore and circumference defining the seal body radial dimension, said body being of a solid construction through said axial and radial dimensions, said bore including a conical surface having a minimum diameter in the direction of said body first face and a maximum dimension adjacent said second face, at least one radial channel defined in said first face intersecting said bore and said circumference, at least one axially extending channel defined in said circumference intersecting said first and second faces, said radial and axial channels being in communication adjacent said body circumference.
Claim 2
Dependent Claim
134 words
A cushion seal for an expansible chamber motor comprising an annular body of elastomeric material having an axis, an inner bore, a circumference, a first radial face and a second radial face, said faces defining the seal body axial dimension and said bore and circumference defining the seal body radial dimension, said body being of a solid construction through said axial and radial dimensions, said bore including a conical surface having a minimum diameter in the direction of said body first face and a maximum dimension adjacent said second face, at least one radial channel defined in said first face intersecting said bore and said circumference, at least one axially extending channel defined in said circumference intersecting said first and second faces, said radial and axial channels being in communication adjacent said body circumference.
Claim 3
Dependent Claim
73 words
In a cushion seal for an expansible chamber motor as in claim 1, a plurality of radial channels formed in said first face and a plurality of axially extending channels defined in said circumference, each of said radial channels communicating with an axially extending channel, and an annular notch defined in said body to the intersection of said circumference and said first face to aid in communication between aligned axial and radial channels.
Claim 4
Dependent Claim
30 words
In a cushion seal for an expansible chamber motor as in claim 2, said axially extending channels comprising four in number being located at 90° intervals about said body circumference.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-10 | 1988-01-09 | 1988-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-10 | 1992-01-09 | 1992-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-10 | 1996-01-09 | 1996-07-10 | $7700.00 | Window Closed / Lapsed |