Patent US3236188A successfully refreshed from Google Patents.
US3236188A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diaphragm pumps
Assignee: Munster Simms and Co Ltd
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Filing: 1963-12-09
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Granted: 1966-02-22
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Expires: 1983-12-09
Abstract
No abstract record available.
Inventors
- 👤 Derek W Eves
- 👤 Randal M Eves
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:22
CPC Classifications
F; F04; F04B; F04B43/00; F04B43/02; F04B43/025; F04B43/026
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
A DIAPHRAGM PUMP COMPRISING A CASING FORMING A PAIR OF PUMPING CHAMBERS, DIAPHRAGM MEANS LOCATED BETWEEN THE PUMPING CHAMBERS AND FORMING AT LEAST PART OF A WALL SEPARATING THE CHAMBERS, A CENTRAL CHAMBER INTERPOSED BETWEEN THE PAIR OF PUMPING CHAMBERS AND FORMED BY THE DIAPHRAGM MEANS, THE DIAPHRAGM MEANS COMPRISING A PAIR OF DIAPHRAGMS SPACED APART IN A COMMON AXIS, EACH DIAPHRAGM COMPRISING A FLEXIBLE MEMBER AND A CENTRAL RIGID MEMBER AND THE DIAPHRAGMS BEING JOINED TOGETHER BY A RECIPROCABLE TIE BAR, MEANS FOR MOVING THE DIAPHRAGMS INTO AND OUT OF THE PUMPING CHAMBERS CONCURRENTLY SO THAT THE VOLUME OF ONE CHAMBER IS CONTRACTED WHILE THE VOLUME OF THE OTHER CHAMBER IS EXPANDED, SAID MEANS FOR ACTUATING THE DIAPRAGMS COMPRISES A SELECTIVELY POSITIONABLE HANDLE EXTENDING THROUGH THE CASING AND CONNECTED TO THE TIE BAR, THE
Claim 2
Dependent Claim
135 words
A DIAPHRAGM PUMP COMPRISING A CASING FORMING A PAIR OF PUMPING CHAMBERS, DIAPHRAGM MEANS LOCATED BETWEEN THE PUMPING CHAMBERS AND FORMING AT LEAST PART OF A WALL SEPARATING THE CHAMBERS, A CENTRAL CHAMBER INTERPOSED BETWEEN THE PAIR OF PUMPING CHAMBERS AND FORMED BY THE DIAPHRAGM MEANS, THE DIAPHRAGM MEANS COMPRISING A PAIR OF DIAPHRAGMS SPACED APART IN A COMMON AXIS, EACH DIAPHRAGM COMPRISING A FLEXIBLE MEMBER AND A CENTRAL RIGID MEMBER AND THE DIAPHRAGMS BEING JOINED TOGETHER BY A RECIPROCABLE TIE BAR, MEANS FOR MOVING THE DIAPHRAGMS INTO AND OUT OF THE PUMPING CHAMBERS CONCURRENTLY SO THAT THE VOLUME OF ONE CHAMBER IS CONTRACTED WHILE THE VOLUME OF THE OTHER CHAMBER IS EXPANDED, SAID MEANS FOR ACTUATING THE DIAPRAGMS COMPRISES A SELECTIVELY POSITIONABLE HANDLE EXTENDING THROUGH THE CASING AND CONNECTED TO THE TIE BAR, THE
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) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |