US3817097A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for testing hydraulic pumps
Assignee: Individual
•
Filing: 1972-06-05
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Granted: 1974-06-18
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Expires: 1992-06-05
Abstract
Abstract A method and apparatus for testing hydraulic pumps in the field. A valve is connected permanently in the hydraulic line, with a movable valve member having a large orifice normally aligned with the hydraulic line to permit unrestricted flow of hydraulic fluid through the valve. The valve body forms a test opening leading from the fluid passageway within the valve to the exterior surface thereof, where the opening is closed by a quick coupler. When the pump is to be tested, the coupler is opened by fitting a mating sleeve thereover, a pressure gage is connected to the test opening, the movable valve member is moved to align a small orifice with the hydraulic line to restrict the flow of hydraulic fluid through the line, and the resulting pressure reading on the gage is used to determine whether the pump is operating satisfactorily. The dial of the gage is calibrated to indicate a ''''go'''' or ''''no go'''' condition of the pump, and may also be provided with numerical indicia to indicate the pressure in numerical units such psi.
Inventors
- 👤 T Heroux
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:43
CPC Classifications
G; G01; G01M; G01M13/00; F; F04; F04B; F04B51/00; F04B2205/00; F04B2205/06; F04B2205/062
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
226 words
A system for testing the efficiency of a hydraulic pump in the field comprising the combination of a valve permanently connected in a system line served by the pump, said valve having a fixed valve body having a fluid passageway extending therethrough to said system line, a movable valve member having a first orifice at least as large as the inside diameter of said system line for permitting unrestricted flow of hydraulic fluid through said valve when said movable member is in a first position and a second orifice smaller than the inside diameter of said system line for restricting flow of hydraulic fluid through said valve when said movable member is in a second position, and manually operable means for moving said movable member between said first and second positions, said valve body forming a test opening leading from an exterior surface of the valve body to said fluid passageway on the pump side of said movable valve element; a connecting member attached to said valve body at the exterior end of said test opening and including a closure for opening and closing said test opening; and a pressure gage adapted for connection to said connecting member for measuring the pressure in said system line when said movable valve member is in said second position to provide an indication of the efficiency of said pump.
Claim 2
Independent Claim
226 words
A system for testing the efficiency of a hydraulic pump in the field comprising the combination of a valve permanently connected in a system line served by the pump, said valve having a fixed valve body having a fluid passageway extending therethrough to said system line, a movable valve member having a first orifice at least as large as the inside diameter of said system line for permitting unrestricted flow of hydraulic fluid through said valve when said movable member is in a first position and a second orifice smaller than the inside diameter of said system line for restricting flow of hydraulic fluid through said valve when said movable member is in a second position, and manually operable means for moving said movable member between said first and second positions, said valve body forming a test opening leading from an exterior surface of the valve body to said fluid passageway on the pump side of said movable valve element; a connecting member attached to said valve body at the exterior end of said test opening and including a closure for opening and closing said test opening; and a pressure gage adapted for connection to said connecting member for measuring the pressure in said system line when said movable valve member is in said second position to provide an indication of the efficiency of said pump.
Claim 3
Dependent Claim
17 words
A testing system as set forth in claim 1 wherein said valve is a spool type valve.
Claim 4
Dependent Claim
17 words
A testing system as set forth in claim 1 wherein said valve is a ball type valve.
Claim 5
Dependent Claim
17 words
A testing system as set forth in claim 1 wherein said valve is a plug type valve.
Claim 6
Dependent Claim
17 words
A testing system as set forth in claim 1 wherein said valve is a plunger type valve.
Claim 7
Dependent Claim
20 words
A testing system as set forth in claim 1 wherein said movable valve member is biased toward said first position.
Claim 8
Dependent Claim
33 words
A testing system as set forth in claim 1 wherein said pressure gage has a dial which is calibrated to indicate whether the pump is operating at a satisfactory or unsatisfactory efficiency level.
Claim 9
Dependent Claim
28 words
A testing system as set forth in claim 7 wherein said pressure gage dial is also provided with numerical indicia to indicate the magnitude of the measured pressure.
Claim 10
Dependent Claim
26 words
A testing system as set forth in claim 1 wherein said closure is opened automatically upon the connection of said pressure gage to said connecting member.
Claim 11
Independent Claim
202 words
A method of testing the efficiency of a hydraulic pump in the field, said method comprising the steps of connecting a valve in a system line served by the pump to be tested, said valve having a fixed valve body having a fluid passageway extending therethrough and connected at opposite ends to said system line, and a movable valve member having a first orifice at least as large as the inside diameter of said system line for permitting unrestricted flow of hydraulic fluid through said valve when said movable member is in a first position, and a second orifice smaller than the inside diameter of said system line for restricting flow of hydraulic fluid through said valve when said movable member is in a second position, said valve body forming a test opening leading from an exterior surface of the valve body to said fluid passageway, removing the normal load from said system line, connecting a pressure gage to said test opening, moving said movable valve member to said second position, and determining the efficiency of the pump by measuring the pressure sensed by said gage while the pump is operated at a preselected speed and temperature with a preselected hydraulic fluid.
Claim 12
Independent Claim
202 words
A method of testing the efficiency of a hydraulic pump in the field, said method comprising the steps of connecting a valve in a system line served by the pump to be tested, said valve having a fixed valve body having a fluid passageway extending therethrough and connected at opposite ends to said system line, and a movable valve member having a first orifice at least as large as the inside diameter of said system line for permitting unrestricted flow of hydraulic fluid through said valve when said movable member is in a first position, and a second orifice smaller than the inside diameter of said system line for restricting flow of hydraulic fluid through said valve when said movable member is in a second position, said valve body forming a test opening leading from an exterior surface of the valve body to said fluid passageway, removing the normal load from said system line, connecting a pressure gage to said test opening, moving said movable valve member to said second position, and determining the efficiency of the pump by measuring the pressure sensed by said gage while the pump is operated at a preselected speed and temperature with a preselected hydraulic fluid.
Claim 13
Dependent Claim
42 words
A test method as set forth in claim 10 wherein the efficiency of said pump is determined by comparing the measured pressure with the standard specified pressure for said pump operated at said presElected speed and temperature with said preselected hydraulic fluid.
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) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |