Patent US3218978A successfully refreshed from Google Patents.
US3218978A
Expired / Lapsed
US
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Diaphragm device
Assignee: ACF Industries Inc
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Filing: 1964-01-16
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Granted: 1965-11-23
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Expires: 1984-01-16
Abstract
No abstract record available.
Inventors
- 👤 Jr Ralph E Kalert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:27
CPC Classifications
F; F02; F02M; F02M1/00; F02M2700/00; F02M2700/43; F02M2700/4302; F02M2700/438; F02M2700/4388; F02M2700/439; Y; Y10; Y10S; Y10S261/00; Y10S261/68
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A DIAPHRAGM DEVICE COMPRISING A PAIR OF INTERFITTING BODY MEMBERS, ONE OF SAID BODY MEMBERS BEING CUPSHAPED AND HAVING AN OUTER ANNULAR RIM AND AN ANNULAR SEAT ADJACENT SAID RIM, THE OTHER OF SAID BODY MEMBERS HAVING AN ANNULAR EXTENSION RECEIVED WITHIN THE ANNULAR RIM OF THE CUP-SHAPED MEMBER, SAID ANNULAR SEAT AND SAID ANNULAR EXTENSION HAVING COMPLEMENTARY OPPOSITELY FACING GENERALLY SMOOTH AND PARALLEL SURFACES EACH INTERRUPTED INTERMEDIATELY THEREOF BY AN ANNULAR GROOVE, A GENERALLY CIRCULAR DIAPHRAGM POSITIONED ACROSS AND HAVING ITS MARGINAL PORTION EXTENDING BETWEEN THE OPPOSITELY FACING SURFACES OF SAID ANNULAR SEAT AND SAID ANNULAR EXTENSION ACROSS THE ANNULAR GROOVES THEREOF, THE PORTION OF THE DIAPHRAGM SPANNING THE GROOVES BEING DEFORMED INTO BOTH OF SAID GROOVES BY PRESSING OF THE DIAPHRAGM BE-
Claim 2
Dependent Claim
124 words
A DIAPHRAGM DEVICE COMPRISING A PAIR OF INTERFITTING BODY MEMBERS, ONE OF SAID BODY MEMBERS BEING CUPSHAPED AND HAVING AN OUTER ANNULAR RIM AND AN ANNULAR SEAT ADJACENT SAID RIM, THE OTHER OF SAID BODY MEMBERS HAVING AN ANNULAR EXTENSION RECEIVED WITHIN THE ANNULAR RIM OF THE CUP-SHAPED MEMBER, SAID ANNULAR SEAT AND SAID ANNULAR EXTENSION HAVING COMPLEMENTARY OPPOSITELY FACING GENERALLY SMOOTH AND PARALLEL SURFACES EACH INTERRUPTED INTERMEDIATELY THEREOF BY AN ANNULAR GROOVE, A GENERALLY CIRCULAR DIAPHRAGM POSITIONED ACROSS AND HAVING ITS MARGINAL PORTION EXTENDING BETWEEN THE OPPOSITELY FACING SURFACES OF SAID ANNULAR SEAT AND SAID ANNULAR EXTENSION ACROSS THE ANNULAR GROOVES THEREOF, THE PORTION OF THE DIAPHRAGM SPANNING THE GROOVES BEING DEFORMED INTO BOTH OF SAID GROOVES BY PRESSING OF THE DIAPHRAGM BE-
References Cited (Backward Citations)
FR873601A
Cited
US2786419A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |