US3685791A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trip mechanism for turbine trip valve
Assignee: Elliott Turbomachinery Co Inc
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Filing: 1971-04-26
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Granted: 1972-08-22
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Expires: 1991-04-26
Abstract
Abstract The trip mechanism for operating the turbine trip valve to closed position includes an actuating lever mounted at one end for movement about a fixed pivot and being provided at the opposite end with a cam block. Spring means or the like acts upon the actuating lever to move the cam block into engagement with the trip valve restraining member to move it out of restraining position for closure of the trip valve. A latch is provided for latching the actuating lever against such pivotal movement. The latch is moved out of latching position by means, such as a solenoid, responsive to a signal indicative of an abnormal situation detrimental to the operation of the turbine.
Inventors
- 👤 Charles C Czuszak
- 👤 Richard A Worthen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:58
CPC Classifications
F; F16; F16K; F16K35/00; F16K35/16; F01; F01B; F01B25/00; F01D; F01D21/00; F01D21/16; F16K31/00; F16K31/44; F16K31/52; F16K31/524; F16K31/52475; F01B2250/00; F01B2250/002
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
116 words
A trip mechanism for a trip valve controlling the flow of operating fluid to a turbine; an operating lever connected to said valve; and means acting on said lever to move said valve to closed position; a restraining member movable into and out of engagement with said lever and operable upon engagement therewith to restrain movement of said valve into closed position; said trip mechanism comprising a cam structure movable into and out of engagement with said restraining member and operable upon engagement therewith to move the same out of engagement with said valve operating lever; an actuating means responsive to a signal to effect movement of said cam structure into engagement with said restraining member.
Claim 2
Dependent Claim
116 words
A trip mechanism for a trip valve controlling the flow of operating fluid to a turbine; an operating lever connected to said valve; and means acting on said lever to move said valve to closed position; a restraining member movable into and out of engagement with said lever and operable upon engagement therewith to restrain movement of said valve into closed position; said trip mechanism comprising a cam structure movable into and out of engagement with said restraining member and operable upon engagement therewith to move the same out of engagement with said valve operating lever; an actuating means responsive to a signal to effect movement of said cam structure into engagement with said restraining member.
Claim 3
Dependent Claim
44 words
A trip mechanism as set fortH in claim 1 wherein said actuating lever is pivotally mounted in a bracket adapted to be mounted on the turbine structure and said signal responsive actuating means is fixed to said bracket and operatively connected to said latch.
Claim 4
Dependent Claim
177 words
A trip mechanism for a trip valve controlling the flow of operating fluid to a turbine; an operating lever connected to said valve; and means acting on said lever to move said valve to closed position; a restraining member movable into and out of engagement with said lever and operable upon engagement therewith to restrain movement of said valve into closed position; said trip mechanism comprising a cam structure including a cam lever mounted at one end for movement about a fixed pivot; a cam block fixed to the opposite end of said cam lever; pressure exerting means acting on said lever to move the same about said pivot to move said cam block into engagement with said restraining member; said cam block being operable upon such engagement to move said restraining member out of engagement with said valve operating lever; latch means movable into engagement with said cam lever for restraining movement thereof by said pressure exerting means and means responsive to a signal to move said latch out of latching engagement with said cam lever.
Claim 5
Dependent Claim
177 words
A trip mechanism for a trip valve controlling the flow of operating fluid to a turbine; an operating lever connected to said valve; and means acting on said lever to move said valve to closed position; a restraining member movable into and out of engagement with said lever and operable upon engagement therewith to restrain movement of said valve into closed position; said trip mechanism comprising a cam structure including a cam lever mounted at one end for movement about a fixed pivot; a cam block fixed to the opposite end of said cam lever; pressure exerting means acting on said lever to move the same about said pivot to move said cam block into engagement with said restraining member; said cam block being operable upon such engagement to move said restraining member out of engagement with said valve operating lever; latch means movable into engagement with said cam lever for restraining movement thereof by said pressure exerting means and means responsive to a signal to move said latch out of latching engagement with said cam lever.
Claim 6
Dependent Claim
53 words
A trip mechanism as set forth in claim 3 wherein said restraining member consists of a lever mounted at one end for movement about a fixed pivot; said lever being provided at its opposite end with a cam block engagable projection extending laterally from said lever in a direct parallel to said pivot.
References Cited (Backward Citations)
US3259357A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |