US3601986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic control system
Assignee: Individual
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Filing: 1969-09-16
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Granted: 1971-08-31
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Expires: 1989-09-16
Abstract
Abstract A hydraulic control unit includes a plurality of radial pump units driven by a common drive means. Each of the pump units is provided with an individual control assembly in the form of a control lever for rotating a cam which adjusts the eccentricity of a guide ring coupled to the radial pistons of a pump unit. In this way, the direction and magnitude of flow from the pump is controlled, being fed to or from the pump through a pair of conduits. The conduits are connected to a valve which, in response to the direction of flow in the conduits, is shifted to direct fluid flow in one of two directions through a hydraulic work unit. The valve also serves to direct fluid received from the work unit to a common condenser.
Inventors
- 👤 Lester J Becker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:00
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/16; F15B11/17; F04; F04B; F04B1/00; F04B1/04; F04B1/0404; F04B1/0408; F04B1/0452; F04B1/0456; F04B1/06; F04B1/07; F04B1/10; F04B1/107; F04B1/1071; F04B1/1074; F04B49/00; F04B49/12; F04B49/123; F04B49/128
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
256 words
A hydraulic control system comprising: drive means; rotor means driven by said drive means and including a plurality of radial pump units, each pump unit having a plurality of radial bores and a piston in each bore; conduit means for conducting fluid to and from said pump units; and individual control means for each radial pump unit for adjusting the radial stroke of the pistons of each unit, whereby the direction and magnitude of fluid flow in said conduit means from each of said pump units is controlled independently of the direction and magnitude of flow in the remaining pump units and the direction of rotation of said rotor means, said system further comprising a stationary shaft about which said rotor means rotates, said conduit means including a first conduit within said shaft communicating with a first port extending about a first substantial portion of the circumferential portion of the circumference of said shaft and adapted to receive fluid from or supply fluid to said radial bores as said bores pass thereover and a second conduit within said shaft communicating with a second port extending about a second substantial portion of the circumference of said shaft and adapted to receive fluid from or supply fluid to said radial bores as said bores pass thereover, and wherein said conduit means comprises valve means for controlling the direction of fluid flow in a pair of fluid lines to and from a hydraulic work unit in response to the direction of fluid flow in said first and second conduit.
Claim 2
Dependent Claim
256 words
A hydraulic control system comprising: drive means; rotor means driven by said drive means and including a plurality of radial pump units, each pump unit having a plurality of radial bores and a piston in each bore; conduit means for conducting fluid to and from said pump units; and individual control means for each radial pump unit for adjusting the radial stroke of the pistons of each unit, whereby the direction and magnitude of fluid flow in said conduit means from each of said pump units is controlled independently of the direction and magnitude of flow in the remaining pump units and the direction of rotation of said rotor means, said system further comprising a stationary shaft about which said rotor means rotates, said conduit means including a first conduit within said shaft communicating with a first port extending about a first substantial portion of the circumferential portion of the circumference of said shaft and adapted to receive fluid from or supply fluid to said radial bores as said bores pass thereover and a second conduit within said shaft communicating with a second port extending about a second substantial portion of the circumference of said shaft and adapted to receive fluid from or supply fluid to said radial bores as said bores pass thereover, and wherein said conduit means comprises valve means for controlling the direction of fluid flow in a pair of fluid lines to and from a hydraulic work unit in response to the direction of fluid flow in said first and second conduit.
Claim 3
Dependent Claim
88 words
A hydraulic control system as recited in claim 1, wherein said valve means comprises a valve body having a plurality of valve chambers within a valve casing, spring means for biasing said valve body to a midposition, within said casing, and means communicating fluid under pressure from one of said ports to a corresponding end of said valve body to shift said valve body toward the other end thereof and establish a fluid path from said one of said ports to a corresponding one of said fluid lines.
Claim 4
Dependent Claim
32 words
A hydraulic control system as recited in claim 2, wherein said valve means, when shifted toward said other end, also establishes a fluid path to a condenser from said other fluid line.
Claim 5
Dependent Claim
58 words
A hydraulic control system as recited in claim 2, wherein said valve body includes four valve heads defining three valve chambers, two of said valve heads closing said fluid lines when said valve body is biased to said midposition, and said fluid lines communicating with two of said chambers when said valve body is shifted toward either end.
Claim 6
Dependent Claim
45 words
A hydraulic control system as recited in claim 4, wherein said valve further comprises a block at each end of said valve casing and said spring means comprises a spring at each end of the valve casing bearing against a corresponding one of said blocks.
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) | 1974-08-30 | 1975-03-01 | 1975-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-30 | 1979-03-01 | 1979-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-30 | 1983-03-01 | 1983-08-31 | $7700.00 | Window Closed / Lapsed |