Patent US2781454A successfully refreshed from Google Patents.
US3083723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum breaker
Assignee: Individual
•
Filing: 1959-11-04
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Granted: 1963-04-02
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Expires: 1979-11-04
Abstract
No abstract record available.
Inventors
- 👤 Paul J Duchin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:33
CPC Classifications
E; E03; E03C; E03C1/00; E03C1/02; E03C1/10; E03C1/104; E03C1/108; Y; Y10; Y10T; Y10T137/00; Y10T137/3149; Y10T137/3185; Y10T137/3294; Y10T137/3331; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7922; Y10T137/7929; Y10T137/7932; Y10T137/7933; Y10T137/7939
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
197 words
IN A FLUID LINE VACUUM BREAKER, A HOUSING HAVING AN INLET CHAMBER AND AN OUTLET CHAMBER WITH A CYLINDRICAL CONTROL PASSAGE THEREBETWEEN, A VALVE PORT BETWEEN SAID CYLINDRICAL CONTROL PASSAGE AND SAID OUTLET CHAMBER, ATMOSPHERIC VENT OPENINGS FORMED IN THE WALL OF SAID CYLINDRICAL CONTROL PASSAGE ADJACENT SAID VALVE PORT, AN ANNULAR PISTON POSITIONED WITHIN SAID CYLINDRICAL CONTROL PASSAGE AND AXIALLY MOVABLE THEREIN, SAID PISTON DEFINING A FLOW PASSAGE THERETHROUGH, FLUID SEAL MEANS BETWEEN SAID PISTON AND SAID CYLINDER, A SEAL ON THE OUTLET CHAMBER SIDE OF SAID PISTON ENGAGEABLE WITH SAID VALVE PORT ON MOVEMENT OF SAID PISTON IN A DIRECTION TOWARD SAID OUTLET CHAMBER, AXIALLY SPACED AND ALIGNED GUIDE MEANS CARRIED WITHIN SAID PISTON AND SAID OUTLET CHAMBER, A VALVE HAVING A STEM AXIALLY MOVABLY CARRIED BY SAID SPACED AND ALIGNED GUIDE MEANS AND EXTENDING THROUGH SAID VALVE PORT, SAID VALVE HAVING A SURFACE POSITIONED ON THE OUTLET CHAMBER SIDE OF SAID PISTON AND ENGAGEABLE WITH SAID SEAL CARRIED ON THE OUTLET CHAMBER SIDE OF SAID PISTON TO STOP FLOW THROUGH SAID PISTON, AND MEANS BIASING SAID VALVE TOWARD SAID PISTON, THEREBY BIASING SAID PISTON TOWARD SAID INLET CHAMBER WHEN SAID VALVE CONTACTS SAID PISTON.
Claim 2
Dependent Claim
197 words
IN A FLUID LINE VACUUM BREAKER, A HOUSING HAVING AN INLET CHAMBER AND AN OUTLET CHAMBER WITH A CYLINDRICAL CONTROL PASSAGE THEREBETWEEN, A VALVE PORT BETWEEN SAID CYLINDRICAL CONTROL PASSAGE AND SAID OUTLET CHAMBER, ATMOSPHERIC VENT OPENINGS FORMED IN THE WALL OF SAID CYLINDRICAL CONTROL PASSAGE ADJACENT SAID VALVE PORT, AN ANNULAR PISTON POSITIONED WITHIN SAID CYLINDRICAL CONTROL PASSAGE AND AXIALLY MOVABLE THEREIN, SAID PISTON DEFINING A FLOW PASSAGE THERETHROUGH, FLUID SEAL MEANS BETWEEN SAID PISTON AND SAID CYLINDER, A SEAL ON THE OUTLET CHAMBER SIDE OF SAID PISTON ENGAGEABLE WITH SAID VALVE PORT ON MOVEMENT OF SAID PISTON IN A DIRECTION TOWARD SAID OUTLET CHAMBER, AXIALLY SPACED AND ALIGNED GUIDE MEANS CARRIED WITHIN SAID PISTON AND SAID OUTLET CHAMBER, A VALVE HAVING A STEM AXIALLY MOVABLY CARRIED BY SAID SPACED AND ALIGNED GUIDE MEANS AND EXTENDING THROUGH SAID VALVE PORT, SAID VALVE HAVING A SURFACE POSITIONED ON THE OUTLET CHAMBER SIDE OF SAID PISTON AND ENGAGEABLE WITH SAID SEAL CARRIED ON THE OUTLET CHAMBER SIDE OF SAID PISTON TO STOP FLOW THROUGH SAID PISTON, AND MEANS BIASING SAID VALVE TOWARD SAID PISTON, THEREBY BIASING SAID PISTON TOWARD SAID INLET CHAMBER WHEN SAID VALVE CONTACTS SAID PISTON.
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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) | 1966-04-01 | 1966-10-01 | 1967-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-01 | 1970-10-01 | 1971-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-01 | 1974-10-01 | 1975-04-02 | $7700.00 | Window Closed / Lapsed |