Patent US3913621A successfully refreshed from Google Patents.
US3913621A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Linear valve control mechanism
Assignee: Elliott Turbomachinery Co Inc
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Filing: 1974-05-29
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Granted: 1975-10-21
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Expires: 1994-05-29
Abstract
Abstract A mechanism for controlling the actuation of a linear series of fluid admission valves suitable for use in the steam chest of a turbine wherein the valves are moved upwardly from the valve seats by means of a cam bar having a cam track for controlling the movement of each valve. The cam bar is reciprocated linearly along a predetermined path of travel that is parallel to the valve series. The bar is supported within a frame secured to the turbine steam chest, the frame supporting two parallel rows of roller bearings or sliding contacts arranged to ride upon the top and bottom surfaces of the bar. A bifurcated member, each arm of which extends adjacent to the planar side walls of the bar, is rotatably attached to a cam follower passing through each cam track, the member being further secured to a valve so that a prescribed motion is translated thereto. As the bar is reciprocated in a linear direction parallel to the valve series, the valves are opened and closed in a predetermined sequence.
Inventors
- 👤 Leonard P Damratowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:17
CPC Classifications
F; F01; F01D; F01D17/00; F01D17/10; F01D17/12; F01D17/18; F16; F16K; F16K31/00; F16K31/44; F16K31/52; F16K31/528; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86928; Y10T137/87016; Y10T137/87024; Y10T137/87265; Y10T137/8741; Y10T137/87491
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
154 words
An actuating mechanism for regulating the flow of fluid through a linear series of admission valves including a frame mounted adjacent to the valve series having two parallel rows of roller bearings supported within said frame, each bearing row being located within the linear plane described by the valve series, a planar cam bar mounted for movement within said linear plane between the two parallel rows of bearings, the bar having two parallel opposed walls containing grooves being arranged to ride in moving contact with said two rows of bearings as said bar moves in said plane, cam tracks formed in said bar, each track being operatively connected to one of said valves in said series for translating a lifting motion thereto, and means to reciprocate said cam bar within said plane whereby said valves are opened and closed in a prescribed order in response to the motion translated thereto by said cam tracks.
Claim 2
Dependent Claim
154 words
An actuating mechanism for regulating the flow of fluid through a linear series of admission valves including a frame mounted adjacent to the valve series having two parallel rows of roller bearings supported within said frame, each bearing row being located within the linear plane described by the valve series, a planar cam bar mounted for movement within said linear plane between the two parallel rows of bearings, the bar having two parallel opposed walls containing grooves being arranged to ride in moving contact with said two rows of bearings as said bar moves in said plane, cam tracks formed in said bar, each track being operatively connected to one of said valves in said series for translating a lifting motion thereto, and means to reciprocate said cam bar within said plane whereby said valves are opened and closed in a prescribed order in response to the motion translated thereto by said cam tracks.
Claim 3
Dependent Claim
34 words
The apparatus of claim 1 wherein at least two rollers in each row are in rolling contact with said cam bar at all times as the bar moves through its reciprocating path of travel.
Claim 4
Dependent Claim
58 words
The apparatus of claim 1 wherein each cam track is a clear aperture passing through the planar walls of the bar and being operatively connected to one of said valves by a bifurcated member, the arms of which span the planar walls of the bar and are pivotally connected to a cam follower passing through the cam track.
Claim 5
Dependent Claim
23 words
The apparatus of claim 3 further including a biasing means for urging the cam follower against the working profile of the cam track.
Claim 6
Dependent Claim
38 words
The apparatus of claim 4 wherein the cam tracks are arranged to translate motion to more than one valve in the series at one time whereby the opening of said valves can be controlled in an overlapping order.
Claim 7
Dependent Claim
33 words
The apparatus of claim 1 further including means for adjusting the positioning of said bearing surfaces in respect to the cam bar whereby the distance between the bar and the valves is controllable.
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) | 1978-10-20 | 1979-04-21 | 1979-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-20 | 1983-04-21 | 1983-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-20 | 1987-04-21 | 1987-10-21 | $7700.00 | Window Closed / Lapsed |