Measuring hydraulic fluid pressure in a fluid-working machine
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United States of America Patent
Stats
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Jul 27, 2021
Grant Date -
May 23, 2019
app pub date -
Sep 21, 2018
filing date -
Nov 17, 2017
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A measurement of the pressure of hydraulic fluid in a fluid working machine can be determined from the timing of the movement of valves which selectively seal a working chamber of cyclically varying volume from a fluid gallery. The timing of opening of a low pressure valve, to connect a working chamber to a low pressure fluid gallery, following the closure of a high pressure valve to seal a working chamber can be used to estimate the pressure in the high pressure fluid gallery at the moment of closure of the high pressure valve.
First Claim
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International Classification(s)
- 2018 Application Filing Year
- F04B Class
- 1144 Applications Filed
- 841 Patents Issued To-Date
- 73.52 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- F04B Class
- 0 % this patent is cited more than
- 4 Age
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| 3.5 Year Payment | $1600.00 | $800.00 | $400.00 | Jan 27, 2025 |
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| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Jan 27, 2033 |
