US4480464A
Expired / Lapsed
US
⏱️ 0.0 years remaining
General purpose hydraulic test station
Assignee: Woodward HRT Inc
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Filing: 1983-02-28
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Granted: 1984-11-06
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Expires: 2003-02-28
Abstract
Abstract A hydraulic test station useful for testing various types of hydraulic apparatus, both at the time of its manufacture and in the field. The test station includes a main console, a roll-up module on which the apparatus to be tested is mounted and an electronic system for controlling the station. The main console includes a plurality of ports. Each of the individual ports may be independently selected for purposes of testing a particular hydraulic apparatus and the specific port may be independently designated as a pressure port or a return port. A manifold is associated with each of the ports and is controllable to select those pressures and flow rates required for performing the desired test or tests on the connected apparatus.
Inventors
- 👤 Neal Whisenand
- 👤 Richard Tauber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:22
CPC Classifications
G; G01; G01M; G01M13/00; F; F15; F15B; F15B19/00; G01L; G01L27/00
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
100 words
A general purpose hydraulic test station for testing hydraulic devices comprising: (A) a housing defining a plurality of hydraulic ports; (B) a source of hydraulic fluid under pressure; (C) a hydraulic return; and (D) manifold means connected to at least one of said ports and including: (1) first valve means, (2) means interconnecting said first valve means with said one port and with said source and with said return, and (3) control means for energizing said first valve means to selectively connect one only of said source and said return to said at least one port at any one time.
Claim 2
Dependent Claim
100 words
A general purpose hydraulic test station for testing hydraulic devices comprising: (A) a housing defining a plurality of hydraulic ports; (B) a source of hydraulic fluid under pressure; (C) a hydraulic return; and (D) manifold means connected to at least one of said ports and including: (1) first valve means, (2) means interconnecting said first valve means with said one port and with said source and with said return, and (3) control means for energizing said first valve means to selectively connect one only of said source and said return to said at least one port at any one time.
Claim 3
Dependent Claim
41 words
A hydraulic test station as defined in claim 1 which further includes pressure reducing means connected in the flow path between said source and said at least one port for controlling the fluid pressure level at said at least one port.
Claim 4
Dependent Claim
29 words
A hydraulic test station as defined in claim 2 which further includes second valve means for energizing said pressure reducing means responsive to a signal from said control means.
Claim 5
Dependent Claim
43 words
A hydraulic test station as defined in claim 1 which further includes flow control means connected in the flow path between said source and said at least one port for controlling the rate of flow of fluid to said at least one port.
Claim 6
Dependent Claim
29 words
A hydraulic test station as defined in claim 4 which further includes third valve means for energizing said flow control means responsive to a signal from said control means.
Claim 7
Dependent Claim
65 words
A hydraulic test station as defined in claim 1 which further includes a separate source of hydraulic fluid under pressure, said separate source having a higher pressure than said source, and fifth valve means for connecting said separate source to said at least one port through said manifold while by passing the remainder of said test station responsive to a signal from said control means.
Claim 8
Dependent Claim
49 words
A hydraulic test station as defined in claim 1 which further includes flow sensing means for measuring the flow of hydraulic fluid and sixth valve means for connecting said flow sensing means between said at least one port and said return responsive to a signal from said control means.
Claim 9
Dependent Claim
31 words
A hydraulic test station as defined in claim 7 wherein said flow sensing means includes a plurality of flow meters each having a different flow rate range which it can sense.
Claim 10
Dependent Claim
55 words
A hydraulic test station as defined in claim 8 wherein said sixth valve means includes a separate poppet valve for each flow meter and means for activating one of said separate poppet valves at a time to interconnect one of said flow meters at a time between said at least one port and said return.
Claim 11
Dependent Claim
54 words
A hydraulic test station as described in claim 1 which further includes variable pressure control means and seventh valve means for connecting said variable pressure control means between said at least one port and said return for pressure biasing said return by an amount equal to the pressure from said variable pressure control means.
Claim 12
Dependent Claim
41 words
A hydraulic test station as defined in claim 10 wherein said seventh valve means includes a further poppet valve connected between said at least one port and said return, said variable pressure control means being connected to said further poppet valve.
Claim 13
Dependent Claim
30 words
A hydraulic test station as described in claim 11 which further includes eighth valve means for activating said variable pressure control means responsive to a signal from said control means.
Claim 14
Dependent Claim
29 words
A hydraulic test station as described in claim 12 which further includes flow sensing means for measuring the flow of hydraulic fluid from said one port to said return.
Claim 15
Dependent Claim
31 words
A hydraulic test station as described in claim 13 wherein said flow sensing means includes a plurality of flow meters each having a different flow rate range which it can sense.
Claim 16
Dependent Claim
40 words
A hydraulic test station as described in claim 14 wherein said seventh valve means includes a separate poppet valve for each of said flow meters, and means for connecting said variable pressure control means to each said separate poppet valves.
Claim 17
Dependent Claim
37 words
A hydraulic test station as described in claim 15 which further includes ninth valve means for selectively activating one of said poppet valves at a time for activating one of said separate flow meters at a time.
Claim 18
Dependent Claim
119 words
A general purpose hydraulic test station for testing hydraulic devices comprising: (A) a housing defining a plurality of hydraulic ports; (B) first and second sources of hydraulic fluid under pressure, each of said first and second sources having a different pressure and a different flow rate; (C) a hydraulic return; and (D) manifold means connected to at least one of said ports and including: (1) first valve means, (2) means interconnecting said first valve means with said one port and with said first and second sources and said return, and (3) control means for energizing said first valve means to selectively connect one only of said first source and said second source and said return to said one port.
Claim 19
Dependent Claim
119 words
A general purpose hydraulic test station for testing hydraulic devices comprising: (A) a housing defining a plurality of hydraulic ports; (B) first and second sources of hydraulic fluid under pressure, each of said first and second sources having a different pressure and a different flow rate; (C) a hydraulic return; and (D) manifold means connected to at least one of said ports and including: (1) first valve means, (2) means interconnecting said first valve means with said one port and with said first and second sources and said return, and (3) control means for energizing said first valve means to selectively connect one only of said first source and said second source and said return to said one port.
Claim 20
Dependent Claim
37 words
A hydraulic test station as defined in claim 17 which further includes selector means for connecting one of said two different sources to said at least one port in response to a signal from said control means.
Claim 21
Dependent Claim
56 words
A hydraulic test station as defined in claim 18 wherein said selector means includes fourth valve means having a directional control valve and a pair of poppet valves, said directional control valve receiving said signal and in response thereto selectively opening one of said poppet valves to allow flow from said one of said two sources.
Claim 22
Dependent Claim
105 words
A general purpose hydraulic test station for testing hydraulic devices comprising: (A) a housing defining a plurality of hydraulic ports; (B) a source of hydraulic fluid under pressure; (C) a hydraulic return; and (D) separate manifold means connected to each of said ports, each of said manifold means including: (1) separate valve means, (2) means interconnecting said separate valve means in each manifold means with said respective port to which said manifold is connected and with said source and said return, and (3) control means for energizing said separate valve means to selectively connect one of said source and said return to said respective port.
Claim 23
Dependent Claim
105 words
A general purpose hydraulic test station for testing hydraulic devices comprising: (A) a housing defining a plurality of hydraulic ports; (B) a source of hydraulic fluid under pressure; (C) a hydraulic return; and (D) separate manifold means connected to each of said ports, each of said manifold means including: (1) separate valve means, (2) means interconnecting said separate valve means in each manifold means with said respective port to which said manifold is connected and with said source and said return, and (3) control means for energizing said separate valve means to selectively connect one of said source and said return to said respective port.
Claim 24
Dependent Claim
26 words
A hydraulic test station as described in claim 20 wherein all of said manifold means are secured together to form a module contained within said housing.
Claim 25
Dependent Claim
117 words
A general purpose hydraulic test station for testing hydraulic devices comprising: (A) a housing defining a plurality of hydraulic ports; (B) a source of hydraulic fluid under pressure; (C) a hydraulic return; (D) manifold means connected to at least one of said ports and including: (1) first valve means, (2) means interconnecting said first valve means with said one port and with said source and said return, and (3) control means for energizing said first valve means to selectively connect one of said source and return to said one port; (E) separate support means for receiving a hydraulic device to be tested; and (F) means for moving said support means adjacent to and remote from said housing.
Claim 26
Dependent Claim
117 words
A general purpose hydraulic test station for testing hydraulic devices comprising: (A) a housing defining a plurality of hydraulic ports; (B) a source of hydraulic fluid under pressure; (C) a hydraulic return; (D) manifold means connected to at least one of said ports and including: (1) first valve means, (2) means interconnecting said first valve means with said one port and with said source and said return, and (3) control means for energizing said first valve means to selectively connect one of said source and return to said one port; (E) separate support means for receiving a hydraulic device to be tested; and (F) means for moving said support means adjacent to and remote from said housing.
Claim 27
Dependent Claim
25 words
A hydraulic test station as described in claim 22 which further includes conduit means for interconnecting said device and at least two of said ports.
References Cited (Backward Citations)
US3827283A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-11-06 | 1988-05-07 | 1988-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-06 | 1992-05-07 | 1992-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-06 | 1996-05-07 | 1996-11-06 | $7700.00 | Window Closed / Lapsed |