US3272219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Check valve having head and seat in removable cartridge
Assignee: Roanoke College
•
Filing: 1965-10-06
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Granted: 1966-09-13
•
Expires: 1985-10-06
Abstract
No abstract record available.
Inventors
- 👤 Virgil L Frantz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:36
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2564; Y10T137/2567; Y10T137/5109; Y10T137/7504; Y10T137/7613; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7922; Y10T137/7929; Y10T137/7936; Y10T137/7937
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A CHECK VALVE COMPRISING A METAL BODY HAVING A BORE, INLET AND OUTLET PORTS IN SAID BODY AND COMMUNICATING AT SPACED POSITIONS WITH SAID BORE, AND A CARTRIDGE UNIT REMOVABLY INSERTED IN SAID BORE, SAID UNIT INCLUDING A METAL CARTRIDGE, A CYLINRICAL CHAMBER IN SAID CARTRIDGE, SAID CHAMBER HAVING OPENINGS IN OPPOSITE ENDS THEREOF AND INTERMEDIATE SAID ENDS AND COMMUNICATING THROUGH AT LEAST ONE END OPENING WITH AN INLET PORT AND THROUGH AN INTERMEDIATE OPENING WITH AN OUTLET PORT, A LIGTHWEIGHT NON-SOLID-METAL CYLINDRICAL SHUTTLE RECIPROCABLE IN SAID CHAMBER BETWEEN ENDS THEREOF AND FREELY IN AT LEAST ONE DIRECTION, AND O-RINGS SEATED IN OPPOSITE ENDS OF SAID CHAMBER ABOUT SAID END OPENINGS THEREIN FOR ALTERNATELY SEATING SAID SHUTTLE, SAID O-RINGS SPACING SAID SHUTTLE FROM SAID CHAMBER ENDS AND CUSHIONING THE RECIPROCABLE MOVEMENT THEREOF.
Claim 2
Dependent Claim
132 words
A CHECK VALVE COMPRISING A METAL BODY HAVING A BORE, INLET AND OUTLET PORTS IN SAID BODY AND COMMUNICATING AT SPACED POSITIONS WITH SAID BORE, AND A CARTRIDGE UNIT REMOVABLY INSERTED IN SAID BORE, SAID UNIT INCLUDING A METAL CARTRIDGE, A CYLINRICAL CHAMBER IN SAID CARTRIDGE, SAID CHAMBER HAVING OPENINGS IN OPPOSITE ENDS THEREOF AND INTERMEDIATE SAID ENDS AND COMMUNICATING THROUGH AT LEAST ONE END OPENING WITH AN INLET PORT AND THROUGH AN INTERMEDIATE OPENING WITH AN OUTLET PORT, A LIGTHWEIGHT NON-SOLID-METAL CYLINDRICAL SHUTTLE RECIPROCABLE IN SAID CHAMBER BETWEEN ENDS THEREOF AND FREELY IN AT LEAST ONE DIRECTION, AND O-RINGS SEATED IN OPPOSITE ENDS OF SAID CHAMBER ABOUT SAID END OPENINGS THEREIN FOR ALTERNATELY SEATING SAID SHUTTLE, SAID O-RINGS SPACING SAID SHUTTLE FROM SAID CHAMBER ENDS AND CUSHIONING THE RECIPROCABLE MOVEMENT THEREOF.
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) | 1969-09-12 | 1970-03-14 | 1970-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-12 | 1974-03-14 | 1974-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-12 | 1978-03-14 | 1978-09-13 | $7700.00 | Window Closed / Lapsed |