Patent US3801064A successfully refreshed from Google Patents.
US3801064A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve actuator
Assignee: INVALCO Inc
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Filing: 1972-07-31
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Granted: 1974-04-02
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Expires: 1992-07-31
Abstract
Abstract A two-position valve is connected to a temperature sensitive element through a linkage system which is manually positioned to actuate the valve to one of the positions, held in the one position by the temperature element responding to a normal range of temperatures, and through which the valve is actuated to the alternate position when the temperature leaves its normal range.
Inventors
- 👤 L Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:25
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/36; F16K17/38; Y; Y10; Y10T; Y10T137/00; Y10T137/1407; Y10T137/8593; Y10T137/87169; Y10T137/87193; Y10T74/00; Y10T74/11
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
184 words
Linkage connected to actuate a two-position valve having a stem, including, a lever arranged to pivot against the valve stem which, by moving from a first to a second position, moves the stem from a first position to a second position, a first spring connected to the lever to move the lever and stem to their second positions, a means arranged and responsive to a variable condition so that when the condition is within a predetermined range, the means will bear against the lever and prevent the lever moving under the force of the first spring to move the valve stem from the first to the second position, a cam arranged to be manually brought into engagement with the valve stem and move it to the first position, the cam being shaped and engaged by the valve stem to releasably maintain the stem in the first position until the cam and stem are released from each other by the means responsive to the variable condition, and a second spring connected to the cam to return the cam to its original position after the release.
Claim 2
Dependent Claim
184 words
Linkage connected to actuate a two-position valve having a stem, including, a lever arranged to pivot against the valve stem which, by moving from a first to a second position, moves the stem from a first position to a second position, a first spring connected to the lever to move the lever and stem to their second positions, a means arranged and responsive to a variable condition so that when the condition is within a predetermined range, the means will bear against the lever and prevent the lever moving under the force of the first spring to move the valve stem from the first to the second position, a cam arranged to be manually brought into engagement with the valve stem and move it to the first position, the cam being shaped and engaged by the valve stem to releasably maintain the stem in the first position until the cam and stem are released from each other by the means responsive to the variable condition, and a second spring connected to the cam to return the cam to its original position after the release.
Claim 3
Dependent Claim
33 words
The linkage of claim 1 wherein, there is a protuberance of the cam, which is positioned to engage the valve stem to maintain the valve stem in the first of its two positions.
Claim 4
Dependent Claim
39 words
The linkage of claim 2 wherein, the second spring is connected to the cam to rotate the cam to its original position upon release of the valve stem from the cam protuberance by the means responsive to the variable.
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) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |