Patent US4112482A successfully refreshed from Google Patents.
Patent US3829104A successfully refreshed from Google Patents.
US3829104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Annular seal
Assignee: Individual
•
Filing: 1972-03-20
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Granted: 1974-08-13
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Expires: 1992-03-20
Abstract
Abstract The present invention relates to a seal, for sealing an annular space between a fixed member and a movable member in the master cylinder assembly of a vehicle braking system, comprising an annular body of resilient material defining one substantially plane end face, two substantially axially extending surfaces intended to form sealing surfaces, and an annular wall protruding axially from the other end face, and beyond the two said surfaces.
Inventors
- 👤 M Green
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:18
CPC Classifications
B; B60; B60T; B60T11/00; B60T11/10; B60T11/16; B60T11/236; F; F16; F16J; F16J15/00; F16J15/16; F16J15/32; F16J15/3268
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
103 words
A seal, for sealing an annular space between a fixed member and a movable member in the master cylinder assembly of a vehicle braking system, comprising a pair of axially spaced annular bodies of resilient material, each defining one substantially plane end face, two substantially axially extending surfaces intended to form sealing surfaces, and an annular wall protruding axially from the other end face, and beyond the two said surfaces, the annular wall of at least one of the seals being interrupted to present a plurality of separated surfaces at its axial extremity, and a rigid ring axially spacing apart said annular bodies.
Claim 2
Dependent Claim
103 words
A seal, for sealing an annular space between a fixed member and a movable member in the master cylinder assembly of a vehicle braking system, comprising a pair of axially spaced annular bodies of resilient material, each defining one substantially plane end face, two substantially axially extending surfaces intended to form sealing surfaces, and an annular wall protruding axially from the other end face, and beyond the two said surfaces, the annular wall of at least one of the seals being interrupted to present a plurality of separated surfaces at its axial extremity, and a rigid ring axially spacing apart said annular bodies.
Claim 3
Dependent Claim
29 words
A master cylinder assembly as claimed in claim 1 and wherein one of said seals has a continuous annular wall and the other seal has an interrupted annular wall.
Claim 4
Dependent Claim
23 words
A master cylinder assembly as claimed in claim 1 and wherein a vent is provided for venting the space between the two seals.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |