US3579987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable hydraulic operation arrangement
Assignee: Robert Bosch GmbH
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Filing: 1969-10-02
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Granted: 1971-05-25
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Expires: 1989-10-02
Abstract
Abstract A hydraulic arrangement in which a pump is adjustably set to supply pressurized fluid to a number of different hydraulically operated devices with different operating requirements. Each of the devices has connected in front of it a control valve which is, in turn, connected in series with a flow limiter. The control valves have position indicators which transmit signals indicative of the valve position. The flow limiters and the pump are settable through electrical signals derived from an electronic control circuit. The control circuit applies the setting signals to the pump and flow limiters in response to the electrical signals received from the valve position indicators.
Inventors
- 👤 Herbert Busse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:09
CPC Classifications
F; F02; F02F; F02F1/00; F02F1/24; F02F1/42; F02F1/4214; F01; F01L; F01L1/00; F01L1/26; F01L3/00; F01L3/08; F01L3/085; F02B; F02B2275/00; F02B2275/14; F02B3/00; F02B3/06; F02F2001/244; F02F2001/247; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
207 words
A hydraulic operating arrangement comprising, in combination, adjustable hydraulic pump means; a source of fluid communicating with the intake of said pump means and being raised in pressure by said pump means; at least two hydraulically operated devices communicating with the outlet of said pump means and receiving pressurized fluid from said outlet; control valve means connected in front of each hydraulically operated device and having variable setting means for controlling the flow of fluid to said device from said pump means; valve position indicating means arranged with each control valve for transmitting an electrical signal indicative of the position of said control valve; flow limit valve means connected in front of each control valve for limiting fluid flow to said control valve and having setting means responsive to an electrical signal so that said limit valve means is set through an electrical signal applied to said setting means; and electronic control means connected to said valve position indicating means for receiving the electrical signals from said valve position indicating means and in response to said received signals transmitting electrical signals for setting said limit valve means and adjusting said pump means, whereby said pump means delivers pressurized fluid with the requirements of said hydraulically operated devices.
Claim 2
Dependent Claim
207 words
A hydraulic operating arrangement comprising, in combination, adjustable hydraulic pump means; a source of fluid communicating with the intake of said pump means and being raised in pressure by said pump means; at least two hydraulically operated devices communicating with the outlet of said pump means and receiving pressurized fluid from said outlet; control valve means connected in front of each hydraulically operated device and having variable setting means for controlling the flow of fluid to said device from said pump means; valve position indicating means arranged with each control valve for transmitting an electrical signal indicative of the position of said control valve; flow limit valve means connected in front of each control valve for limiting fluid flow to said control valve and having setting means responsive to an electrical signal so that said limit valve means is set through an electrical signal applied to said setting means; and electronic control means connected to said valve position indicating means for receiving the electrical signals from said valve position indicating means and in response to said received signals transmitting electrical signals for setting said limit valve means and adjusting said pump means, whereby said pump means delivers pressurized fluid with the requirements of said hydraulically operated devices.
Claim 3
Dependent Claim
33 words
The hydraulic Operating arrangement as defined in claim 1 including power amplifier means arranged on said pump means and responding to electrical signals from said electronic control means for setting said pump means.
Claim 4
Dependent Claim
56 words
The hydraulic operating arrangement as defined in claim 1 wherein one of said hydraulically operated devices comprises a hydraulic motor, said control valve in front of said hydraulic motor having one position for transmitting pressurized fluid to said hydraulic motor, and said control valve having a second position for inhibiting fluid flow to said hydraulic motor.
Claim 5
Dependent Claim
71 words
The hydraulic operating arrangement as defined in claim 1 wherein one of said hydraulically operated devices comprises a hydraulic cylinder and piston, said control valve in front of said hydraluic cylinder and piston having one operating position for transmitting pressurized fluid to said hydraulic cylinder and having a second operating position for transmitting fluid from said hydraulic cylinder to said source of fluid communicating with the intake of said pump means.
Claim 6
Dependent Claim
62 words
The hydraulic operating arrangement as defined in claim 1 wherein one of said hydraulically operated devices comprises a double-acting hydraulic cylinder and piston for steering a motor vehicle, the steering wheel of said motor vehicle being mechanically linked to said control valve means in front of said double-acting steering cylinder for setting the control valve in front of said double-acting steering cylinder.
Claim 7
Dependent Claim
25 words
The hydraulic operating arrangement as defined in claim 1 wherein said flow limit valve means throttle the pressurized fluid flowing to said control valve means.
Claim 8
Dependent Claim
21 words
The hydraulic operating arrangement as defined in claim 1 wherein said hydraulically operated devices have different fluid pressure requirements for operation.
Claim 9
Dependent Claim
22 words
The hydraulic operating arrangement as defined in claim 1 wherein said hydraulically operated devices have different fluid flow quantity requirements for operation.
Claim 10
Dependent Claim
47 words
The hydraulic operating arrangement as defined in claim 1 including main fluid conduit means connected to the outlet of said pump means for receiving pressurized fluid from said pump means; and secondary conduit means branching from said main conduit means and leading to said hydraulically operated devices.
Claim 11
Dependent Claim
32 words
The hydraulic operating arrangement as defined in claim 1 including fluid storage means connected to at least said pump means for storing a predetermined quantity of fluid to operate said hydraulic devices.
References Cited (Backward Citations)
US2316926A
Cited
US2867091A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |