Patent US3646956A successfully refreshed from Google Patents.
US3646956A
Expired / Lapsed
US
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Radial flow check valve
Assignee: Individual
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Filing: 1970-03-18
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Granted: 1972-03-07
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Expires: 1990-03-18
Abstract
Abstract A radial flow check valve having radially displaced annular inlet and discharge passages, an annular sealing wall between the inlet and discharge passages extending generally transverse to the axis, and an annular symmetrical elastomeric membrane secured at one edge to the body, when closed engaging the sealing wall at the other and movable edge of the membrane, and separating the inlet and discharge passages, having a web intermediate between its ends which in cross section is convex on the side toward the inlet passage, the movable edge of the membrane opening away from the sealing wall in a generally axial direction. In the preferred form the membrane has at the movable edge an annular lip extending toward the discharge passage and which may contain a metallic support ring. Also in the preferred form there is an annular vortex pocket located adjoining the side of the membrane which exerts closing force, the vortex pocket connecting at one side with the discharge passage by an annular opening, and the discharge passage extending directly from the space between the movable edge of the membrane and the sealing wall when the membrane is open. In the preferred form the membrane at rest conforms to the position which it assumes when the check valve is closed. The membrane may be clamped between separate parts of the body. In axial length the discharge passage is preferably between 0.5 and 1.5 times the distance of full opening of the check valve. In one form, the inlet and discharge passages are led from axial connecting passages.
Inventors
- 👤 Adair Rogers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:56
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/14; F16K15/148; F16K15/144; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7879; Y10T137/7888; Y10T137/789
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
140 words
A radial flow check valve having a body, radially displaced coaxial annular inlet and discharge passages in the body, an annular sealing wall in the body located between the inlet and discharge passages and extending generally transverse to the axis, and an annular symmetrical elastomeric membrane secured at one edge in the body, when closed engaging the sealing wall at the other and movable edge of the membrane and separating the inlet and discharge passages, having an annular web intermediate its edges which in cross section is convex on the side toward the inlet passage, the movable edge of the membrane opening away from the sealing wall in a generally axial direction, having at the movable edge of the membrane an annular lip extending toward the discharge passage and having a support ring extending through the interior of the lip.
Claim 2
Dependent Claim
140 words
A radial flow check valve having a body, radially displaced coaxial annular inlet and discharge passages in the body, an annular sealing wall in the body located between the inlet and discharge passages and extending generally transverse to the axis, and an annular symmetrical elastomeric membrane secured at one edge in the body, when closed engaging the sealing wall at the other and movable edge of the membrane and separating the inlet and discharge passages, having an annular web intermediate its edges which in cross section is convex on the side toward the inlet passage, the movable edge of the membrane opening away from the sealing wall in a generally axial direction, having at the movable edge of the membrane an annular lip extending toward the discharge passage and having a support ring extending through the interior of the lip.
Claim 3
Dependent Claim
36 words
A valve of claim 1, in which in closed position the edge of the membrane secured to the body is displaced from the plane of the sealing wall farther than the movable edge of the membrane.
Claim 4
Dependent Claim
23 words
A check valve of claim 2, in which the inlet passage is located toward the radial outside with respect to the discharge passage.
Claim 5
Dependent Claim
23 words
A check valvE of claim 2, in which the inlet passage is located toward the radial inside with respect to the discharge passage.
Claim 6
Dependent Claim
27 words
A check valve of claim 2, in which the inlet passage connects with a coaxial inlet connection and the discharge passage connects with a coaxial discharge connection.
Claim 7
Dependent Claim
41 words
A valve of claim 2, having an annular vortex pocket located in the body adjoining the side of the membrane at which closing force is applied, said vortex pocket connecting at one side with the discharge passage through an annular opening.
Claim 8
Dependent Claim
43 words
A check valve of claim 1, having an annular vortex pocket located in the body adjoining the side of the membrane at which closing force is exerted, said vortex pocket being connected at one side with the discharge passage through an annular opening.
Claim 9
Dependent Claim
30 words
A check valve of claim 7, in which the discharge passage has an axial length of between 0.5 and 1.5 times the axial distance of full opening of the valve.
Claim 10
Dependent Claim
73 words
A check valve of claim 1, having an annular vortex pocket located adjoining the side of the membrane at which closing force is exerted and the annular discharge passage extending directly from the space between the movable end of the membrane and the sealing wall when the membrane is open radially along the sealing wall and open to the vortex pocket at the side remote from the sealing wall by an annular opening.
Claim 11
Dependent Claim
24 words
A check valve of claim 1, in which the membrane when at rest assumes the shape which it has when the valve is closed.
Claim 12
Dependent Claim
31 words
A check valve of claim 1, having at the edge of the membrane secured in the body an annular lip, parts of the body being separable for replacement of the membrane.
Claim 13
Dependent Claim
66 words
An annular symmetrical elastomeric membrane having radially inner and outer edges which are of different diameters, having at one of these edges an annular lip and having an annular web between the edges which is convex upon one side and concave on the other side, the two edges of the membrane being relatively displaced along the axis and having a support ring extending through said lip.
Claim 14
Dependent Claim
66 words
An annular symmetrical elastomeric membrane having radially inner and outer edges which are of different diameters, having at one of these edges an annular lip and having an annular web between the edges which is convex upon one side and concave on the other side, the two edges of the membrane being relatively displaced along the axis and having a support ring extending through said lip.
Claim 15
Dependent Claim
21 words
A membrane of claim 12, having annular lips at both inner and outer edges and support rings extending through both lips.
Claim 16
Independent Claim
83 words
A method of closing a check valve having an annular membrane one edge of which is fixed and the other edge of which is movable, and having in cross section a web between the edges, one side of which is convex and one side of which is concave, which comprises conducting a part of the flow from the discharge side into an annular vortex pocket against the concave side and there converting the kinetic energy of part of the flow into differential pressure.
Claim 17
Independent Claim
83 words
A method of closing a check valve having an annular membrane one edge of which is fixed and the other edge of which is movable, and having in cross section a web between the edges, one side of which is convex and one side of which is concave, which comprises conducting a part of the flow from the discharge side into an annular vortex pocket against the concave side and there converting the kinetic energy of part of the flow into differential pressure.
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) | 1975-03-07 | 1975-09-06 | 1976-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-07 | 1979-09-06 | 1980-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-07 | 1983-09-06 | 1984-03-07 | $7700.00 | Window Closed / Lapsed |