US3559677A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Overload control valve
Assignee: McNeil Corp
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Filing: 1969-05-28
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Granted: 1971-02-02
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Expires: 1989-05-28
Abstract
Abstract A valve for controlling the maximum pressure of gas in a system has a control chamber which senses pressure in the system through an aperture that extends lengthwise of a spring-pressed valvepiston which is moved to cutoff position by excess pressure.
Inventors
- 👤 John M Barosko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:50
CPC Classifications
B; B66; B66F; B66F3/00; B66F3/24; B66F3/25; B66F3/42; B66F3/247; F; F16; F16K; F16K31/00; F16K31/12; F16K31/36; F16K31/363; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7738; Y10T137/7739; Y10T137/7781; Y10T137/7793; Y10T137/7796; Y10T137/7809; Y10T137/781; Y10T137/7811
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
329 words
An overload control valve comprising a housing having a fluid inlet and a fluid outlet and a fluid flow chamber connecting said inlet and outlet, a first valve seat in said flow chamber between said inlet and outlet arranged so that all fluid flows through the seat when the valve is open, said housing including a bore and first seal means defining one end of the bore, said housing including a pressure sensing chamber located between said seal means and said flow chamber and out of the path of fluid flow from said inlet to said outlet, said housing having control chamber forming means at the outer end of the bore and including a second valve seat, said first and second valve seats and said bore and chambers being longitudinally aligned, a longitudinally movable valve piston member in said bore having first and second valve portions at opposite ends arranged to seat respectively on said first and second valve seats and including a valve stem slidably extending through said seal means and an enlarged piston portion slidably engaging the wall of said bore, second seal means associated with said piston portion and engaging the wall of the bore, resilient means urging said valve member to seat on the second valve seat, said valve member including a longitudinal aperture in said stem and opening out of said second valve portion into said control chamber when said valve member is seated on said second valve seat, said valve member including transverse aperture forming means at the first valve portion end opening into said sensing chamber and connecting said sensing chamber to said longitudinal aperture when said valve member is seated on said second valve seat, said longitudinal aperture and said control chamber communicating with said piston portion when said valve member is unseated from said second valve seat and the pressure therefrom acting on the piston portion in a direction to seat said first valve portion on said first valve seat.
Claim 2
Dependent Claim
329 words
An overload control valve comprising a housing having a fluid inlet and a fluid outlet and a fluid flow chamber connecting said inlet and outlet, a first valve seat in said flow chamber between said inlet and outlet arranged so that all fluid flows through the seat when the valve is open, said housing including a bore and first seal means defining one end of the bore, said housing including a pressure sensing chamber located between said seal means and said flow chamber and out of the path of fluid flow from said inlet to said outlet, said housing having control chamber forming means at the outer end of the bore and including a second valve seat, said first and second valve seats and said bore and chambers being longitudinally aligned, a longitudinally movable valve piston member in said bore having first and second valve portions at opposite ends arranged to seat respectively on said first and second valve seats and including a valve stem slidably extending through said seal means and an enlarged piston portion slidably engaging the wall of said bore, second seal means associated with said piston portion and engaging the wall of the bore, resilient means urging said valve member to seat on the second valve seat, said valve member including a longitudinal aperture in said stem and opening out of said second valve portion into said control chamber when said valve member is seated on said second valve seat, said valve member including transverse aperture forming means at the first valve portion end opening into said sensing chamber and connecting said sensing chamber to said longitudinal aperture when said valve member is seated on said second valve seat, said longitudinal aperture and said control chamber communicating with said piston portion when said valve member is unseated from said second valve seat and the pressure therefrom acting on the piston portion in a direction to seat said first valve portion on said first valve seat.
Claim 3
Dependent Claim
43 words
A valve as set forth in claim 1 including a coil spring in said bore based at one end on said first seal means and the other end bearing against a side of said piston portion, said coil spring forming said resilient means.
Claim 4
Dependent Claim
28 words
A valve as set forth in claim 2 wherein said control chamber forming means is longitudinally adjustable in said housing to vary the compression of said coil spring.
Claim 5
Dependent Claim
35 words
A valve as set forth in claim 1 wherein at least one of said seal means is flexible to provide for relief of pressure in the bore on the low-pressure side of the piston portion.
Claim 6
Dependent Claim
17 words
A valve as set forth in claim 4 wherein said one seal means comprises a U-cup element.
Claim 7
Dependent Claim
38 words
A valve as set forth in claim 1 wherein said first valve portion comprises a separate element mounted on said stem and said transverse aperture forming means comprises a slotted roll pin securing the element to the stem.
Claim 8
Dependent Claim
34 words
A valve as set forth in claim 6 wherein said resilient means comprises a coil spring in said bore confined between said first seal means and the low pressure side of said piston portion.
Claim 9
Dependent Claim
31 words
A valve as set forth in claim 7 wherein said one of first and second seal means comprises an annular U-cup facing outwardly from the adjacent end of the coil spring.
Claim 10
Dependent Claim
27 words
A valve as seT forth in claim 8 wherein both said seal means comprise annular U-shaped cups facing outwardly from the adjacent end of the coil spring.
Claim 11
Dependent Claim
28 words
A valve as set forth in claim 9 wherein the control chamber forming means is longitudinally adjustable in said housing to vary the compression of the coil spring.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |