Patent US3315890A successfully refreshed from Google Patents.
US3315890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reverse acting double port thermostat with butterfly characteristic
Assignee: Dole Valve Co
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Filing: 1965-07-02
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Granted: 1967-04-25
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Expires: 1985-07-02
Abstract
No abstract record available.
Inventors
- 👤 Harold B Drapeau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:00
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/01; G05D23/02; G05D23/021; G05D23/022
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
A DOUBLE PORT THERMOSTAT FOR CONTROLLING THE FLOW OF FLUID THROUGH A CONDUIT COMPRISING: A TEMPERATURE RESPONSIVE POWER UNIT HAVING FIRST AND SECOND RELATIVELY EXTENSIBLE POWER MEMBERS, A SUPPORTING BRACKET FOR POSITIONING SAID THERMALLY RESPONSIVE POWER UNIT WITHIN SAID CONDUIT, A FIRST VALVE MEANS DISPOSED FOR INCREASING THE FLOW OF FLUID THROUGH SAID CONDUIT IN RESPONSE TO A DOWNSTREAM MOTION OF SAID FIRST POWER MEMBER, A SECOND VALVE MEANS DISPOSED FOR INCREASING THE FLOW OF FLUID THROUGH SAID CONDUIT IN RESPONSE TO AN UPSTREAM MOTION OF SAID SECOND POWER MEMBER, MEANS RIGIDLY HOLDING SAID SECOND POWER MEMBER STATIONARY DURING A DOWNSTREAM MOTION OF SAID FIRST POWER MEMBER, MEANS RIGIDLY HOLDING SAID FIRST POWER MEMBER STATIONARY DURING AN UPSTREAM MOTION OF SAID SECOND POWER MEMBER, AND MEANS GENERATING A DOWNSTREAM MOTION OF SAID FIRST POWER MEMBER PRIOR TO AN UPSTREAM MOTION OF SAID SECOND POWER MEMBER IN RESPONSE TO INCREASING FLUID TEMPERATURE.
Claim 2
Dependent Claim
151 words
A DOUBLE PORT THERMOSTAT FOR CONTROLLING THE FLOW OF FLUID THROUGH A CONDUIT COMPRISING: A TEMPERATURE RESPONSIVE POWER UNIT HAVING FIRST AND SECOND RELATIVELY EXTENSIBLE POWER MEMBERS, A SUPPORTING BRACKET FOR POSITIONING SAID THERMALLY RESPONSIVE POWER UNIT WITHIN SAID CONDUIT, A FIRST VALVE MEANS DISPOSED FOR INCREASING THE FLOW OF FLUID THROUGH SAID CONDUIT IN RESPONSE TO A DOWNSTREAM MOTION OF SAID FIRST POWER MEMBER, A SECOND VALVE MEANS DISPOSED FOR INCREASING THE FLOW OF FLUID THROUGH SAID CONDUIT IN RESPONSE TO AN UPSTREAM MOTION OF SAID SECOND POWER MEMBER, MEANS RIGIDLY HOLDING SAID SECOND POWER MEMBER STATIONARY DURING A DOWNSTREAM MOTION OF SAID FIRST POWER MEMBER, MEANS RIGIDLY HOLDING SAID FIRST POWER MEMBER STATIONARY DURING AN UPSTREAM MOTION OF SAID SECOND POWER MEMBER, AND MEANS GENERATING A DOWNSTREAM MOTION OF SAID FIRST POWER MEMBER PRIOR TO AN UPSTREAM MOTION OF SAID SECOND POWER MEMBER IN RESPONSE TO INCREASING FLUID TEMPERATURE.
References Cited (Backward Citations)
US2174042A
Cited
US2137136A
Cited
US2200318A
Cited
US2873070A
Cited
US2926853A
Cited
US3108616A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-04-24 | 1970-10-24 | 1971-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-24 | 1974-10-24 | 1975-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-24 | 1978-10-24 | 1979-04-25 | $7700.00 | Window Closed / Lapsed |