US3584647A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solenoid pilot dump combination directional control valve
Assignee: Individual
•
Filing: 1969-07-31
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Granted: 1971-06-15
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Expires: 1989-07-31
Abstract
Abstract An oppositely spring loaded spool-type valve is also pilotpressurized oppositely to control pressure liquid flow past three ball checks and through associated external lines to two hydraulic load actuating cylinders. One of these is a doubleacting cylinder selectively pressurized at its opposite ends, and the other is a single-acting, spring return cylinder pressurized at only one end, these cylinders being parts of an external system controlled by the valve. Three two-way solenoid actuated valves are operated under the control of pushbutton switch means to govern the voiding of hydraulic liquid from the respective cylinder ends in certain phases of the operation of the valve; and hydraulic operating pressure is supplied by a motor powered pump. The operation of the pump is also responsive to pushbutton switch operation, whether by itself along or conjointly with the operation of the pressure-dumping solenoid valves, in the said certain phases of operation. The pump pressurizes a valve manifold with which three ball check-governed passages are placed in communication under control of the valve spool.
Inventors
- 👤 Robert E Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:51
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/04; F15B13/042; F15B13/043; F15B13/0431; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87169; Y10T137/87193; Y10T137/87201; Y10T137/87209; Y10T137/87233; Y10T137/87241
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
104 words
A fluid pressure control valve mechanism, comprising a spooltype valve unit having an intake pressure port and at least three output pressure ports, said valve unit having internal pressure flow passage means and a slidable valve spool controlling flow of pressure fluid through said passage means from said intake port to an output pressure port or ports, a valve device operatively connected in communication with each of said output ports to permit a reverse flow of pressure liquid in the latter, means blocking such reverse flow against return to said valve units, and means selectively operating said valve devices to control said reverse flow.
Claim 2
Dependent Claim
104 words
A fluid pressure control valve mechanism, comprising a spooltype valve unit having an intake pressure port and at least three output pressure ports, said valve unit having internal pressure flow passage means and a slidable valve spool controlling flow of pressure fluid through said passage means from said intake port to an output pressure port or ports, a valve device operatively connected in communication with each of said output ports to permit a reverse flow of pressure liquid in the latter, means blocking such reverse flow against return to said valve units, and means selectively operating said valve devices to control said reverse flow.
Claim 3
Dependent Claim
60 words
The valve mechanism of claim 1, in which said valve unit has internal pilot passage means normally subject to fluid pressure at said intake port, pressure in said pilot passage means being effective on said valve spool to control the position thereof and the flow of pressure fluid in said internal pressure flow passage means to said output pressure ports.
Claim 4
Dependent Claim
28 words
The valve mechanism of claim 2, in which said valve devices are normally closed ones opening in response to the operating means therefor to discharge said reverse flow.
Claim 5
Dependent Claim
30 words
The valve mechanism of claim 2, in which said pilot pressure passage means includes restricted orifices subjecting opposite ends of said valve spool to the pressure of said intake Port.
Claim 6
Dependent Claim
97 words
The valve mechanism of claim 1, in which said valve unit has internal pilot passage means normally subject to fluid pressure at said intake port, pressure in said pilot passage means being effective on said valve spool to control the position thereof and the flow of pressure fluid in said internal pressure flow passage means to said output pressure ports, and spring means acting on said valve spool to locate the latter in a position in which pressure is applied from said intake port through said pressure flow passage means to only one of said output ports.
Claim 7
Dependent Claim
28 words
The valve mechanism of claim 5, in which said valve devices are normally closed ones opening in response to the operating means therefor to discharge said reverse flow.
Claim 8
Dependent Claim
30 words
The valve mechanism of claim 6, in which said pilot pressure passage means includes restricted orifices subjecting opposite ends of said valve spool to the pressure of said intake port.
Claim 9
Dependent Claim
30 words
The valve mechanism of claim 5, in which said pilot pressure passage means includes restricted orifices subjecting opposite ends of said valve spool to the pressure of said intake port.
Claim 10
Dependent Claim
28 words
The valve mechanism of claim 1, in which said valve devices are normally closed ones opening in response to the operating means therefor to discharge said reverse flow.
Claim 11
Dependent Claim
25 words
The valve mechanism of claim 1, in which said valve devices are electrically operated solenoid valves opening upon electrical energization to discharge the reverse flow.
Claim 12
Dependent Claim
27 words
The valve mechanism of claim 1, in which said valve devices are mounted on a body member of said unit in which said passage means is formed.
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) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |