Patent US3818800A successfully refreshed from Google Patents.
US3818800A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrohydraulic remote-control devices of slide distributors
Assignee: Hydraulique BG
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Filing: 1972-11-01
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Granted: 1974-06-25
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Expires: 1992-11-01
Abstract
Abstract In electrohydraulic remote-control devices for distributor slide valves having manual or mechanical control, the control actuator of each distributor comprises a first face provided with means for fixing the actuator to the distributor such that the actuator and distributor are separable by a movement of translation of axis perpendicular to the said face, a second face of functional connection with the said forward conduit and the said return conduit, and a third face provided with means for mounting an electrovalve on the actuator such that the electrovalve is separable from the actuator by a movement of translation perpendicular to this face.
Inventors
- 👤 A Bertaux
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:02
CPC Classifications
F; F15; F15B; F15B15/00; F15B15/08; F15B15/14; F15B15/149; F15B13/00; F15B13/02; F15B13/04; F15B13/044; F15B15/1423; F15B15/1433; F15B15/20; F15B15/202
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
179 words
A hydraulic actuator comprising: a. a body having first, second, and third mutually perpendicular faces, a cylinder formed in said body, a piston slidable within said cylinder, and a rod fixed to and movable with said piston, b. said first face having an opening aligned with said cylinder through which said rod can move to transmit movement of said piston to a device being operated by said actuator, said first face also being provided with means for securing the actuator to such a device, c. said second face having two ports for connection to the supply and return conduits of a source of pressurized hydraulic fluid, d. said third face having four orifices, duct means within said body connecting a first pair of said orifices to said two ports, respectively, and duct means within said body connecting a second pair of said orifices to said cylinder, one on each side of said piston, and e. a valve mounted on said third face for controlling the flow of hydraulic fluid between said orifices, thereby controlling the movement of said piston.
Claim 2
Dependent Claim
179 words
A hydraulic actuator comprising: a. a body having first, second, and third mutually perpendicular faces, a cylinder formed in said body, a piston slidable within said cylinder, and a rod fixed to and movable with said piston, b. said first face having an opening aligned with said cylinder through which said rod can move to transmit movement of said piston to a device being operated by said actuator, said first face also being provided with means for securing the actuator to such a device, c. said second face having two ports for connection to the supply and return conduits of a source of pressurized hydraulic fluid, d. said third face having four orifices, duct means within said body connecting a first pair of said orifices to said two ports, respectively, and duct means within said body connecting a second pair of said orifices to said cylinder, one on each side of said piston, and e. a valve mounted on said third face for controlling the flow of hydraulic fluid between said orifices, thereby controlling the movement of said piston.
Claim 3
Dependent Claim
49 words
A hydraulic actuator as defined in claim 1 wherein said body has a fourth face opposite its second face, said fourth face having two ports, and duct means within said body for connecting said two ports in said second face to said two ports in said fourth face, respectively.
Claim 4
Dependent Claim
57 words
A hydraulic actuator as defined in claim 1 wherein said means for securing the first face of said actuator to a device include screws whose axes are perpendicular to said first face, and including screws for securing said valve to said third face of said actuator, the axes of said screws being perpendicular to said third face.
Claim 5
Dependent Claim
77 words
A hydraulic actuator as defined in claim 1 wherein said valve has four orifices connected to the four orifices, respectively, in said third face, and a movable valve member for permitting communication either between a first of said orifices and a third and fourth of said orifices or a second of said orifices and said third and fourth of said orifices, said third and fourth orifices communicating with said second pair of orifices in said third face.
Claim 6
Dependent Claim
33 words
A hydraulic actuator as defined in claim 4 wherein said valve has a single face formed with said four orifices, said valve face being in contact with said third face of said body.
Claim 7
Dependent Claim
61 words
A hydraulic actuator as defined in claim 4 including a member between said valve and said third face of said body, screws passing through said valve, member, and third face to secure said valve and member to said body, said member having duct means for interconnecting said four orifices of said valve to said four orifices in said third face, respectively.
Claim 8
Dependent Claim
14 words
A hydraulic actuator as defined in claim 1 wherein said valve is electrically controlled.
Claim 9
Dependent Claim
14 words
A hydraulic actuator as defined in claim 1 wherein said valve is pneumatically controlled.
Claim 10
Dependent Claim
56 words
A hydraulic actuator as defined in claim 1 assembled side-by-side with a plurality of other identical actuators, all of said first faces of the actuators being in a single plane, said second faces of each pair of adjacent actuators facinG each other, said two ports of said facing second faces being interconnected by separate conduit means.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-24 | 1977-12-24 | 1978-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-24 | 1981-12-24 | 1982-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-24 | 1985-12-24 | 1986-06-25 | $7700.00 | Window Closed / Lapsed |