US3911796A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diaphragm
Assignee: Gates Rubber Co
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Filing: 1974-08-19
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Granted: 1975-10-14
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Expires: 1994-08-19
Abstract
Abstract The invention relates to diaphragms and particularly to flexible diaphragms used in fluid actuators for vehicle braking systems. The diaphragm is generally dish shaped in configuration and contains a flat top planar portion, a flanged portion and an annular sidewall. The diaphragm according to this invention is particularly characterized by the fact that, the interior surface of the shoulder diaphragm formed generally at the connecting portion of the top planar surface and the annular sidewall is provided with a multiple of protuberances on the interior shoulder area. The protuberances may be in the form of a multitude of buttons or bumps or circular or undulating circumferential ribs generally following the circumference of the shoulder.
Inventors
- 👤 Charles R Hull
- 👤 Jr George E Heikes
- 👤 Maurice W Macbeth
- 👤 Ronald E Difrancia
- 👤 Claude L Henderson
- 👤 Harlan E Cluphf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:31
CPC Classifications
B; B60; B60T; B60T17/00; B60T17/08; F; F16; F16J; F16J3/00; F16J3/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
144 words
In a fluid actuator system having a flat follower plate fully engaging all of a flat interior top planar surface of a dish shaped flexible diaphragm said diaphragm comprising: a flange; a top planar surface; an annular sidewall connecting said flange and top flat planar surface; and a multitude of raised buttons to engage the follower plate in the actuator system, said button disposed over the interior surface of a shoulder area consisting of a curved connecting portion between said top flat planar surface and said annular sidewall and said buttons also disposed on the interior surface of the immediately adjacent annular portions of said top flat planar surface and said annular sidewall connected to said shoulder area in order to accommodate misalignment of the follower plate as it coacts with the buttons on the inner surface of the shoulder area of the diaphragm.
Claim 2
Dependent Claim
144 words
In a fluid actuator system having a flat follower plate fully engaging all of a flat interior top planar surface of a dish shaped flexible diaphragm said diaphragm comprising: a flange; a top planar surface; an annular sidewall connecting said flange and top flat planar surface; and a multitude of raised buttons to engage the follower plate in the actuator system, said button disposed over the interior surface of a shoulder area consisting of a curved connecting portion between said top flat planar surface and said annular sidewall and said buttons also disposed on the interior surface of the immediately adjacent annular portions of said top flat planar surface and said annular sidewall connected to said shoulder area in order to accommodate misalignment of the follower plate as it coacts with the buttons on the inner surface of the shoulder area of the diaphragm.
Claim 3
Dependent Claim
15 words
A diaphragm according to Claim 1 in which the buttons are substantially hemispherical shaped protuberances.
Claim 4
Dependent Claim
15 words
A diaphragm according to claim 1 in which the buttons are substantially pyramidal shaped protuberances.
Claim 5
Dependent Claim
40 words
A diaphragm according to claim 1 in which the buttons disposed on said annular sidewall comprise spaced apart ribs provided along the inner surface of the annular sidewall and ending at the juncture of the annular sidewall and the shoulder.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-13 | 1979-04-14 | 1979-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-13 | 1983-04-14 | 1983-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-13 | 1987-04-14 | 1987-10-14 | $7700.00 | Window Closed / Lapsed |