US4288060A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sequenced drive for rotary valves
Assignee: United States Department of Energy
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Filing: 1979-12-21
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Granted: 1981-09-08
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Expires: 1999-12-21
Abstract
Abstract A sequenced drive for rotary valves which provides the benefits of applying rotary and linear motions to the movable sealing element of the valve. The sequenced drive provides a close approximation of linear motion while engaging or disengaging the movable element with the seat minimizing wear and damage due to scrubbing action. The rotary motion of the drive swings the movable element out of the flowpath thus eliminating obstruction to flow through the valve.
Inventors
- 👤 Larry C. Mittell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:09
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/44; F16K1/00; F16K1/24
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
295 words
A sequenced drive mechanism for producing linear and rotary motions in rotary valves having a housing within which is located a seat and a sealing element movable with respect to the seat, said sequenced drive mechanism comprising a first link adapted to be connected at one end thereof to a driving means and having a pair of spaced cam followers secured at the other end thereof, a first shaft, a second link having one end thereof connected to said first shaft and having a longitudinally extending slot in the other end thereof, one of said pair of spaced cam follows being located within said slot, a second shaft in offset coaxial arrangement with respect to said first shaft and operatively connected to said sealing element, a third link having a pair of angularly spaced, outwardly extending arms secured to said second shaft, one of said arms having an open slot in the outer end thereof and adapted to cooperate with a third cam follower fixedly secured to said valve housing, the other of said arms having a longitudinally extending slot therein having two sections of which one section is wider than the other, the other of said pairs of spaced cam followers being located within said last mentioned slot, such that initial rotation of said first link in one direction moves said second link causing rotation of said first shaft without rotation of said second shaft resulting in a translating of said sealing element in a direction substantially perpendicular with respect to said seat and moving said third link with respect to said third cam follower, and further rotation of said first shaft moves said third link causing rotation of said second shaft which produces rotation of said sealing element with respect to said seat.
Claim 2
Dependent Claim
295 words
A sequenced drive mechanism for producing linear and rotary motions in rotary valves having a housing within which is located a seat and a sealing element movable with respect to the seat, said sequenced drive mechanism comprising a first link adapted to be connected at one end thereof to a driving means and having a pair of spaced cam followers secured at the other end thereof, a first shaft, a second link having one end thereof connected to said first shaft and having a longitudinally extending slot in the other end thereof, one of said pair of spaced cam follows being located within said slot, a second shaft in offset coaxial arrangement with respect to said first shaft and operatively connected to said sealing element, a third link having a pair of angularly spaced, outwardly extending arms secured to said second shaft, one of said arms having an open slot in the outer end thereof and adapted to cooperate with a third cam follower fixedly secured to said valve housing, the other of said arms having a longitudinally extending slot therein having two sections of which one section is wider than the other, the other of said pairs of spaced cam followers being located within said last mentioned slot, such that initial rotation of said first link in one direction moves said second link causing rotation of said first shaft without rotation of said second shaft resulting in a translating of said sealing element in a direction substantially perpendicular with respect to said seat and moving said third link with respect to said third cam follower, and further rotation of said first shaft moves said third link causing rotation of said second shaft which produces rotation of said sealing element with respect to said seat.
Claim 3
Dependent Claim
248 words
In a valve comprising a housing having a flowpath therethrough, a valve seat located in said flowpath, and a movable sealing element operatively positioned therein to cooperate with said valve seat, the improvement comprising: means operatively connected to said movable sealing element for producing linear translation and rotary movement of said sealing element with respect to said valve seat without obstructing the flowpath through said housing, said means including a drive mechanism, a first shaft, a first linkage assembly operatively connecting said drive mechanism to said first shaft, a second shaft in offset coaxial relation with respect to said first shaft and adapted to move with rotation of said first shaft, said second shaft being operatively connected to said sealing element, a second linkage assembly operatively connected to said second shaft and having a pair of angularly extending arms, one of said arms being provided with means at the outer end thereof which is removably connected to a member fixed to said housing, the other of said arms being constructed to be operatively connected to said first linkage assembly, whereby initial rotation of said drive mechanism causes rotation of said first shaft via said first linkage assembly and movement of said second shaft and said second linkage assembly and linear movement of said sealing element without rotational movement of said sealing element and said second linkage assembly, and wherein further rotation of said drive mechanism causes rotation of said second linkage assembly and rotation of said sealing element.
Claim 4
Dependent Claim
248 words
In a valve comprising a housing having a flowpath therethrough, a valve seat located in said flowpath, and a movable sealing element operatively positioned therein to cooperate with said valve seat, the improvement comprising: means operatively connected to said movable sealing element for producing linear translation and rotary movement of said sealing element with respect to said valve seat without obstructing the flowpath through said housing, said means including a drive mechanism, a first shaft, a first linkage assembly operatively connecting said drive mechanism to said first shaft, a second shaft in offset coaxial relation with respect to said first shaft and adapted to move with rotation of said first shaft, said second shaft being operatively connected to said sealing element, a second linkage assembly operatively connected to said second shaft and having a pair of angularly extending arms, one of said arms being provided with means at the outer end thereof which is removably connected to a member fixed to said housing, the other of said arms being constructed to be operatively connected to said first linkage assembly, whereby initial rotation of said drive mechanism causes rotation of said first shaft via said first linkage assembly and movement of said second shaft and said second linkage assembly and linear movement of said sealing element without rotational movement of said sealing element and said second linkage assembly, and wherein further rotation of said drive mechanism causes rotation of said second linkage assembly and rotation of said sealing element.
Claim 5
Dependent Claim
95 words
The improvement defined in claim 2, wherein said first linkage assembly consists of a first link connected at one end to said drive mechanism and having a pair of spaced cam followers secured at the other end thereof, and a second link having one end connected to said first shaft and the other end thereof operatively cooperating with one of said pair of spaced cam followers; and wherein said other of said arms of said second linkage assembly operatively cooperates with the other of said pair of spaced cam followers of said first linkage assembly.
Claim 6
Dependent Claim
172 words
The improvement defined in claim 3, wherein said other of said arms of said second linkage assembly is provided with a longitudinally extending slot having two sections of which one section is wider than the other section, and wherein said other of said pair of spaced cam followers of said first link of said first linkage assembly is located within said slot of said other of said arms of said second linkage assembly such that initial rotation of said first link in one direction moves said second link via said one of said pair of spaced cam followers causing rotation of said first shaft, and such that said other of said pair of cam followers move along at least said one section of said slot in said other of said arms of said second linkage assembly without causing rotationally movement of said second linkage assembly, and further rotation of said first link in said one direction causes rotation of said second linkage assembly via said other of said pairs of cam followers.
Claim 7
Dependent Claim
72 words
The improvement defined in claim 4, wherein said means at the outer end of one of said arms of said second linkage assembly includes a slot in said outer end thereof which cooperates with a pin constituting said member fixed to said housing; and wherein said second link of said first linkage assembly is provided with a longitudinally extending slot within which said one of said pair of cam followers is located.
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) | 1984-09-07 | 1985-03-09 | 1985-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-07 | 1989-03-09 | 1989-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-07 | 1993-03-09 | 1993-09-08 | $7700.00 | Window Closed / Lapsed |