US3746299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quick operating device for a valve
Assignee: Westinghouse Electric Corp
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Filing: 1971-07-19
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Granted: 1973-07-17
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Expires: 1991-07-19
Abstract
Abstract A mechanism utilizing a pair of cooperatively associated hydraulic cylinders and springs for absorbing and storing the energy produced by slowing down a large on-off type valve having a fast closing action as the valve approaches its closed position and releasing the energy to open the valve quickly.
Inventors
- 👤 I Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:01
CPC Classifications
F; F01; F01D; F01D17/00; F01D17/10; F01D17/12; F01D17/14; F01D17/141; F01D17/145; F01D17/148
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
141 words
A quick operating device for a valve, said device comprising a first chamber and a first movable abutment disposed therein, said first movable abutment being cooperatively associated with said valve to open and close said valve, a first spring cooperatively associated with said first movable abutment to bias the valve in closing direction, a second chamber and a second movable abutment disposed therein, a second spring cooperatively associated with said first movable abutment to absorb energy from the valve as the valve approaches its closed position, means for supplying a charge of pressurized fluid to said second chamber when said second spring is compressed, a conduit between said first and second chamber, and means for controlling the flow in said conduit so that pressurized fluid from said second chamber maY be supplied to said first chamber to open said valve quickly.
Claim 2
Dependent Claim
141 words
A quick operating device for a valve, said device comprising a first chamber and a first movable abutment disposed therein, said first movable abutment being cooperatively associated with said valve to open and close said valve, a first spring cooperatively associated with said first movable abutment to bias the valve in closing direction, a second chamber and a second movable abutment disposed therein, a second spring cooperatively associated with said first movable abutment to absorb energy from the valve as the valve approaches its closed position, means for supplying a charge of pressurized fluid to said second chamber when said second spring is compressed, a conduit between said first and second chamber, and means for controlling the flow in said conduit so that pressurized fluid from said second chamber maY be supplied to said first chamber to open said valve quickly.
Claim 3
Dependent Claim
28 words
A device as set forth in claim 1 and further comprising means for supplying pressurized fluid to said first chamber to open said valve at a normal rate.
Claim 4
Dependent Claim
25 words
A device as set forth in claim 1 and further comprising means for dumping the fluid in said first chamber to close the valve quickly.
Claim 5
Dependent Claim
66 words
A device as set forth in claim 1, wherein the second chamber is a hydraulic cylinder and the second movable abutment is a floating piston movable in one direction by a pressurized fluid when the second spring is compressed and movable in the other direction by the second spring to supply pressurized fluid to said first chamber at a high rate to close the valve quickly.
Claim 6
Dependent Claim
32 words
A device as set forth in claim 1, wherein the means for supplying pressurized fluid to the second chamber is the supply conduit for pressurized fluid with a check valve disposed therein.
Claim 7
Dependent Claim
45 words
A device as set forth in claim 1, wherein said second spring is cooperatively associated with said second movable abutment to provide the sufficient charge in pressurized fluid to produce rapid acceleration of said valve in opening direction when the flow control means is open.
Claim 8
Dependent Claim
32 words
A device as set forth in claim 1, wherein the second spring and said charge of pressurized fluid cooperate to accelerate the valve in opening direction when the control means is open.
Claim 9
Dependent Claim
24 words
A device as set forth in claim 1 wherein the modulus of the first spring is greater than the modulus of the second 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) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |