US3147770A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cycling valve
Assignee: Individual
•
Filing: 1962-01-26
•
Granted: 1964-09-08
•
Expires: 1982-01-26
Abstract
No abstract record available.
Inventors
- 👤 David B Perlis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:04
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/44; F16K31/52; F16K31/528; F16K31/48; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86389; Y10T137/86405
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
173 words
A CYCLING VALVE FOR CONTROLLING FLUID FLOW, COMPRISING THE COMBINATION OF: A HALLOW BODY HAVING SPACED FLUID INLET AND OUTLET OPENINGS AND A FLUID PORT BETWEEN SAID OPENINGS; SEAT MEANS AT THE PORT; VALVE MEANS MOVABLE INTO ENGAGEMENT WITH THE SEAT AND AWAY THEREFROM TO CONTROL FLUID FLOW THROUGH THE PORT; A PISTON MOVABLE WITHIN THE BODY; MEANS SLIDABLY COUPLING THE PISTON TO THE VALVE MEANS TO ENGAGE THE VALVE MEANS NEAR ONE END OF THE AXIAL TRAVEL OF THE PISTON TO MOVE THE VALVE MEANS AWAY FROM THE SEAT; SPRING MEANS NORMALLY URGING THE PISTON AND THE VALVE MEANS TOWARD THE SEAT, SAID PISTON MOVING AWAY FROM THE SEAT IN OPPOSITION TO THE SPRING MEANS AND IN RESPONSE TO FLUID PRESSURE THEREON EXERTED BY FLUID ENTERING THE BODY THROUGH THE INLET OPENING; SAID SPRING MEANS COMPRISING A FIRST SPRING BETWEEN THE VALVE MEANS AND THE PISTON AND A SECOND SPRING BETWEEN THE PISTON AND THE HOUSING, THE SECOND SPRING BEING STRONGER THAN THE FIRST; ABUTMENT MEANS COMPRISING A FIXED MEMBER, AND A
Claim 2
Dependent Claim
173 words
A CYCLING VALVE FOR CONTROLLING FLUID FLOW, COMPRISING THE COMBINATION OF: A HALLOW BODY HAVING SPACED FLUID INLET AND OUTLET OPENINGS AND A FLUID PORT BETWEEN SAID OPENINGS; SEAT MEANS AT THE PORT; VALVE MEANS MOVABLE INTO ENGAGEMENT WITH THE SEAT AND AWAY THEREFROM TO CONTROL FLUID FLOW THROUGH THE PORT; A PISTON MOVABLE WITHIN THE BODY; MEANS SLIDABLY COUPLING THE PISTON TO THE VALVE MEANS TO ENGAGE THE VALVE MEANS NEAR ONE END OF THE AXIAL TRAVEL OF THE PISTON TO MOVE THE VALVE MEANS AWAY FROM THE SEAT; SPRING MEANS NORMALLY URGING THE PISTON AND THE VALVE MEANS TOWARD THE SEAT, SAID PISTON MOVING AWAY FROM THE SEAT IN OPPOSITION TO THE SPRING MEANS AND IN RESPONSE TO FLUID PRESSURE THEREON EXERTED BY FLUID ENTERING THE BODY THROUGH THE INLET OPENING; SAID SPRING MEANS COMPRISING A FIRST SPRING BETWEEN THE VALVE MEANS AND THE PISTON AND A SECOND SPRING BETWEEN THE PISTON AND THE HOUSING, THE SECOND SPRING BEING STRONGER THAN THE FIRST; ABUTMENT MEANS COMPRISING A FIXED MEMBER, AND A
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) | 1967-09-08 | 1968-03-09 | 1968-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-08 | 1972-03-09 | 1972-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-08 | 1976-03-09 | 1976-09-08 | $7700.00 | Window Closed / Lapsed |