Patent US4270441A successfully refreshed from Google Patents.
US4270441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pump diaphragm
Assignee: PSG California LLC
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Filing: 1979-03-01
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Granted: 1981-06-02
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Expires: 1999-03-01
Abstract
Abstract A diaphragm configuration is disclosed for an air-driven pump. The diaphragm includes concentric ribs on the pressure side of the flexure portion thereof. This has been found to extend the life of diaphragms made of relatively brittle materials such as synthetic resin polymers. A ridge is provided on the surface of the diaphragm where sealing is to occur as a means for increasing the sealing capability of the synthetic resin polymer material.
Inventors
- 👤 Alan D. Tuck, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:03
CPC Classifications
F; F16; F16J; F16J3/00; F16J3/02; F04; F04B; F04B43/00; F04B43/0009; F04B43/0054
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
92 words
A pump assembly including an air chamber housing, a liquid chamber housing and a diaphragm positioned therebetween, said air chamber housing having an air sealing means adjacent said diaphragm for sealing the joint between said air chamber housing and said diaphragm, said liquid chamber housing having an annular channel adjacent to said diaphragm and said diaphragm having a convex annular member to mate with said annular channel wherein the improvement comprises a continuous ridge on the convex annular member, said ridge being inwardly of the center line of said convex annular member.
Claim 2
Dependent Claim
92 words
A pump assembly including an air chamber housing, a liquid chamber housing and a diaphragm positioned therebetween, said air chamber housing having an air sealing means adjacent said diaphragm for sealing the joint between said air chamber housing and said diaphragm, said liquid chamber housing having an annular channel adjacent to said diaphragm and said diaphragm having a convex annular member to mate with said annular channel wherein the improvement comprises a continuous ridge on the convex annular member, said ridge being inwardly of the center line of said convex annular member.
Claim 3
Dependent Claim
88 words
A pump assembly including an air chamber housing, a liquid chamber housing and a diaphragm positioned therebetween, said air chamber housing and said liquid chamber housing each having an annular channel adjacent said diaphragm, an O-ring positioned in said air chamber housing channel and said diaphragm having a semi-circular annular channel at said air chamber housing and liquid chamber housing channels wherein the improvement comprises a continuous ridge on the outer side of said semi-circular annular channel, said ridge being inwardly of the center line of said channel.
Claim 4
Dependent Claim
88 words
A pump assembly including an air chamber housing, a liquid chamber housing and a diaphragm positioned therebetween, said air chamber housing and said liquid chamber housing each having an annular channel adjacent said diaphragm, an O-ring positioned in said air chamber housing channel and said diaphragm having a semi-circular annular channel at said air chamber housing and liquid chamber housing channels wherein the improvement comprises a continuous ridge on the outer side of said semi-circular annular channel, said ridge being inwardly of the center line of said channel.
Claim 5
Dependent Claim
18 words
The pump assembly of claim 2 or claim 1 wherein said ridge is integrally formed with said diaphragm.
Claim 6
Dependent Claim
17 words
The pump assembly of claim 2 or claim 1 wherein said diaphragm is a synthetic resin polymer.
References Cited (Backward Citations)
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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) | 1984-06-01 | 1984-12-01 | 1985-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-01 | 1988-12-01 | 1989-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-01 | 1992-12-01 | 1993-06-02 | $7700.00 | Window Closed / Lapsed |