US3554214A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve device with relief action and suction action for hydraulic systems
Assignee: MONSUN TISON AB
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Filing: 1969-07-07
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Granted: 1971-01-12
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Expires: 1989-07-07
Abstract
Abstract The invention relates to a valve device intended for connection into a pressure fluid conduit, as for instance a pressure fluid conduit from a pressure fluid source to a hydraulic motor. The valve device has a combined relief or overpressure valve action and suction or underpressure valve action; at excessive pressure in the pressure fluid conduit pressure fluid being discharged through the valve device to a tank and at underpressure in the pressure fluid conduit a communication being established through the valve device between the pressure fluid conduit and a tank conduit for neutralization of the underpressure in the pressure fluid conduit. The valve device is easily adjustable to give alternatively only the overpressure valve action or only the underpressure valve action. A preferred embodiment of the valve device can be connected into two different pressure fluid conduits, as for instance the two pressure fluid conduits from a pressure fluid source to the two cylinder chambers of a double action hydraulic cylinder. This preferred embodiment of the valve device gives overpressure valve action as well as underpressure valve action in both pressure fluid conduits and can easily be adjusted to discharge the overflowing pressure fluid at an excessive pressure in any one of the pressure fluid conduits alternatively to a tank conduit or directly to the other pressure fluid conduit.
Inventors
- 👤 Stig Gote Stenlund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:18
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; Y; Y10; Y10T; Y10T137/00; Y10T137/5109; Y10T137/5196; Y10T137/7722; Y10T137/7771; Y10T137/7772; Y10T137/7777; Y10T137/7837; Y10T137/7838; Y10T137/7845
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
267 words
A valve device comprising a valve body (1) having at least a first longitudinal bore (2) and first and second stationary valve seats (12,14) at opposite ends of said bore, a first valve member mounted in said first bore and permitting an axial fluid flow in said first bore between said first and second stationary valve seat, said first valve member including first and second valve cones (9,13) facing in opposite directions at opposite ends of said valve member for cooperating with said first and second stationary valve seats respectively, said first and second valve cones being mutually axially movable, and force exerting means (10) acting between said first and second valve cones for urging them into sealing relationship with said first and second valve seats respectively, a first fluid chamber (16) located at the one end of said first longitudinal bore so as to communicate therewith via one oF said stationary valve seats (14), said first valve member also including an overpressure valve (17,18) provided in the end of the valve member closest to said first fluid chamber for opening and establishing communication between said first bore (2) and said first fluid chamber (16) when the fluid pressure in said bore exceeds a predetermined value, a first pressure fluid port (4) in said valve body (1) communicating with said first bore (2) between said first and second valve seats and adapted to be connected to a pressure fluid conduit, and a first outlet port (6) in said valve body (1) communicating with said first fluid chamber (16) and adapted to be connected to a tank conduit.
Claim 2
Dependent Claim
267 words
A valve device comprising a valve body (1) having at least a first longitudinal bore (2) and first and second stationary valve seats (12,14) at opposite ends of said bore, a first valve member mounted in said first bore and permitting an axial fluid flow in said first bore between said first and second stationary valve seat, said first valve member including first and second valve cones (9,13) facing in opposite directions at opposite ends of said valve member for cooperating with said first and second stationary valve seats respectively, said first and second valve cones being mutually axially movable, and force exerting means (10) acting between said first and second valve cones for urging them into sealing relationship with said first and second valve seats respectively, a first fluid chamber (16) located at the one end of said first longitudinal bore so as to communicate therewith via one oF said stationary valve seats (14), said first valve member also including an overpressure valve (17,18) provided in the end of the valve member closest to said first fluid chamber for opening and establishing communication between said first bore (2) and said first fluid chamber (16) when the fluid pressure in said bore exceeds a predetermined value, a first pressure fluid port (4) in said valve body (1) communicating with said first bore (2) between said first and second valve seats and adapted to be connected to a pressure fluid conduit, and a first outlet port (6) in said valve body (1) communicating with said first fluid chamber (16) and adapted to be connected to a tank conduit.
Claim 3
Dependent Claim
84 words
A valve device as claimed in claim 1, wherein a second fluid chamber (8) is provided in said valve body (1) at the other end of said first longitudinal bore (2) so as to communicate therewith via the other one of said stationary valve seats (12) and said first valve member is provided with an axial bore (25) extending from the one end to the opposite end of the valve member and forming a flow passage between said first and second fluid chambers (16,8).
Claim 4
Dependent Claim
77 words
A valve device as claimed in claim 2, wherein said first bore (2) has a bottom end provided with said second stationary valve seat (12) and communicating with said second fluid chamber (8) and an open end, a plug (15) being inserted in said open end of said first bore, said plug including said first fluid chamber (16) and being provided with said first stationary valve seat (14) between said first fluid chamber and said first bore.
Claim 5
Dependent Claim
63 words
A valve device as claimed in claim 1, wherein said valve body (1) includes a second fluid chamber (8) located at the other end of said first bore (2) so as to communicate therewith via the other stationary valve seat (12), and a second outlet port (7) communicating with said second fluid chamber (8) and adapted to be connected to a tank conduit.
Claim 6
Dependent Claim
62 words
A valve device as claimed in claim 1, wherein said first and second stationary valve seats (12,14) have the same shape and size and said first and second valve cones (9,13) on said first valve member have also the same shape and device, whereby the valve member can be selectively mounted in said first bore in anyone of two mutually reversed positions.
Claim 7
Dependent Claim
164 words
A valve device as claimed in claim 1, wherein said valve body (1) has a second longitudinal bore (3) similar to said first longitudinal bore (2) with third and fourth stationary valve seats (14'', 12'') at opposite ends of said second bore; a second valve member similar to said first valve member being mounted in said second bore for cooperation with said third and fourth stationary valve seats; the valve body including also a second fluid chamber (8) communicating with said first and second bores (2,3) via said second and fourth stationary valve seats (12,12'') respectively, a third fluid chamber (16'') communicating with said second bore (3) via said third stationary valve seat (14''), a second pressure fluid port (5) communicating with said second bore (3) between said third and fourth valve seats and adapted to be connected to a pressure fluid conduit, and a second outlet port (7) communicating with said third fluid chamber (16'') and adapted to be connected to a tank.
Claim 8
Dependent Claim
65 words
A valve device as claimed in claim 6, wherein said stationary valve seat (12,14,12'',14'') have the same shape and size and said first and second valve cones (9,13,9'',13'') on said first and second valve members respectively also have the same shape and size, whereby each of said valve members can be mounted selectively in any one of two mutually reversed positions in its associated bore.
Claim 9
Dependent Claim
54 words
A valve device as claimed in claim 1, wherein the minimum axial spacing between said first and second valve cones (9,13) of said first valve member corresponds to the axial spacing between said first and second stationary valve seats (14,12) so that said valve cones cannot be lifted from their associated stationary Valve seats.
Claim 10
Dependent Claim
47 words
A valve device as claimed in claim 1, wherein said first valve member includes biassing means (20) for said relief valve (17,18) for determining the opening pressure of said relief valve, said biassing means (20) being adjustable to maintain said overpressure valve (17) closed against any overpressure.
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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |