US3627261A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Balanced rotary plate valve and method of making
Assignee: ANDREWS IND Inc
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Filing: 1969-09-17
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Granted: 1971-12-14
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Expires: 1989-09-17
Abstract
Abstract A valve structure which includes an edge-sealing valve plate which swings about an axis between closed and open positions. The valve plate is balanced by locating the plate with respect to the axis of rotation such that pressure-induced force-moments about the valve stem axis of rotation sum to zero when the valve is closed. The valve-sealing surfaces are shaped and positioned with respect to the axis such that every portion of the sealing periphery of the valve plate moves with a motion component normal to the corresponding sealing surface of the valve seat of the valve body to provide a compressive seal about the entire sealing periphery upon the application of closing torque. Upon opening, the entire sealing periphery of the valve plate moves away from the valve seat.
Inventors
- 👤 Edwin H Ludeman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:20
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/16; F16K1/18; F16K1/22; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49405; Y10T29/49412
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
81 words
A valve comprising a body with a flow passage therethrough and a valve plate rotatably supported on a valve stem having an axis for rotation between closed and open positions, the valve plate being balanced against pressure-induced rotation when in the closed position, the valve body passage including a valve seat against which the periphery of the valve plate seals in a zone of contact, perpendiculars to which at any point neither intersect nor parallel the valve stem axis of rotation.
Claim 2
Dependent Claim
81 words
A valve comprising a body with a flow passage therethrough and a valve plate rotatably supported on a valve stem having an axis for rotation between closed and open positions, the valve plate being balanced against pressure-induced rotation when in the closed position, the valve body passage including a valve seat against which the periphery of the valve plate seals in a zone of contact, perpendiculars to which at any point neither intersect nor parallel the valve stem axis of rotation.
Claim 3
Dependent Claim
22 words
The valve of claim 1 wherein the periphery of the valve plate seals against the valve seat along a line of contact.
Claim 4
Dependent Claim
32 words
The valve of claim 1 wherein the periphery of the valve plate is a surface of finite area which is substantially contiguous with the valve seat surface when the valve is closed.
Claim 5
Dependent Claim
15 words
The valve of claim 1 wherein the periphery of the valve plate is compressively deformable.
Claim 6
Dependent Claim
12 words
The valve of claim 1 wherein the valve seat is compressively deformable.
Claim 7
Dependent Claim
15 words
The valve of claim 1 wherein the periphery of the valve plate is an elastomer.
Claim 8
Dependent Claim
12 words
The valve of claim 1 wherein the valve seat is an elastomer.
Claim 9
Dependent Claim
89 words
A valve comprising a body with a flow passage therethrough and a valve plate rotatably supported on a valve stem having an axis for rotation between closed and open positions, the valve plate being balanced against pressure-induced rotation when in the closed position, the valve body passage including a sealing means against which the periphery of the valve plate establishes an initial contact upon rotation in the closing direction, a normal to the sealing means at any point of initial contact neither intersecting nor paralleling the valve stem axis.
Claim 10
Dependent Claim
89 words
A valve comprising a body with a flow passage therethrough and a valve plate rotatably supported on a valve stem having an axis for rotation between closed and open positions, the valve plate being balanced against pressure-induced rotation when in the closed position, the valve body passage including a sealing means against which the periphery of the valve plate establishes an initial contact upon rotation in the closing direction, a normal to the sealing means at any point of initial contact neither intersecting nor paralleling the valve stem axis.
Claim 11
Dependent Claim
118 words
A valve comprising a body with a flow passage therethrough and a valve plate rotatably supported on a valve stem having an axis for rotation between closed and open positions, the valve plate being balanced against pressure-induced rotation in the closed position, the valve body passage including a valve seat against which the periphery of the valve plate seals in a zone of contact, the valve seat being a continuous uninterrupted surface, each portion of the valve seat surface in the zone of contact lying at a finite acute angle of incidence to the arc of rotation described by the corresponding portion of the valve plate periphery as the valve plate is rotated about the valve stem axis.
Claim 12
Dependent Claim
118 words
A valve comprising a body with a flow passage therethrough and a valve plate rotatably supported on a valve stem having an axis for rotation between closed and open positions, the valve plate being balanced against pressure-induced rotation in the closed position, the valve body passage including a valve seat against which the periphery of the valve plate seals in a zone of contact, the valve seat being a continuous uninterrupted surface, each portion of the valve seat surface in the zone of contact lying at a finite acute angle of incidence to the arc of rotation described by the corresponding portion of the valve plate periphery as the valve plate is rotated about the valve stem axis.
Claim 13
Independent Claim
152 words
A method of forming the sealing surface of a valve having a body with a flow passage therethrough and a valve plate rotatably supported on a valve stem having an axis for rotation between closed and open positions, the valve plate being balanced against pressure-induced rotation when in the closed position, the valve body passage including a valve seat against which the periphery of the valve plate seals in a zone of contact, comprising of steps of; constructing arcs of rotation of points on the valve plate periphery, the arcs being in parallel planes perpendicular to the valve stem axis, constructing tangents to the arcs at the points of initial sealing contact of the valve plate periphery with the valve seat, CONSTRUCTING a line to each point of tangency, the line being at a finite acute angle to the tangent, and connecting all such constructed lines to form the continuous sealing surface.
Claim 14
Independent Claim
152 words
A method of forming the sealing surface of a valve having a body with a flow passage therethrough and a valve plate rotatably supported on a valve stem having an axis for rotation between closed and open positions, the valve plate being balanced against pressure-induced rotation when in the closed position, the valve body passage including a valve seat against which the periphery of the valve plate seals in a zone of contact, comprising of steps of; constructing arcs of rotation of points on the valve plate periphery, the arcs being in parallel planes perpendicular to the valve stem axis, constructing tangents to the arcs at the points of initial sealing contact of the valve plate periphery with the valve seat, CONSTRUCTING a line to each point of tangency, the line being at a finite acute angle to the tangent, and connecting all such constructed lines to form the continuous sealing surface.
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) | 1974-12-13 | 1975-06-14 | 1975-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-13 | 1979-06-14 | 1979-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-13 | 1983-06-14 | 1983-12-14 | $7700.00 | Window Closed / Lapsed |