Patent US3840047A successfully refreshed from Google Patents.
US3840047A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic apparatus
Assignee: Dowty Mining Equipment Ltd
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Filing: 1972-10-20
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Granted: 1974-10-08
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Expires: 1992-10-20
Abstract
Abstract A hydraulic apparatus including a pair of body members, each having a flat surface, a hydraulic circuit member having two flat parallel surfaces and at least one slot extending in the circuit member between the two parallel flat surfaces, clamping means to hold the body members together with the circuit member clamped between the flat body surfaces, at least one hydraulic component formed on or secured to at least one body member, and ports including at least one port from the component or components. Each port opens into the flat surface of the body member in which it is formed. The arrangement is such that associated ports are connected by a slot in the circuit member which forms a flow passage between the flat surfaces of the pair of body members to carry fluid in a direction parallel to the flat surfaces between the ports.
Inventors
- 👤 R Gibbins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:08
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/06; F15B13/08; F15B13/0803; F15B13/0821; F15B13/0807; F15B13/0814; F15B13/0828; F15B13/0832; F15B13/0878; F15B13/0885; F15B13/0892; F15B13/0896; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87169; Y10T137/87193; Y10T137/87201; Y10T137/877; Y10T137/87885; Y10T137/87893; Y10T137/9029; Y10T137/9138
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
179 words
A hydraulic apparatus including a pair of body members each having a flat surface, a hydraulic circuit member having two flat parallel surfaces, a plurality of slots in the circuit member each opening along its length to the two parallel flat surfaces, clamping means to hold the body members together with the circuit member clamped between the flat body surfaces, at least on pilotoperated valve formed on or secured to a body member, at least one port connected to carry pilot fluid for pilot operation of the pilot-operated valve, such port opening to the flat surface oF the associated body member, a multiple hydraulic connector formed on or secured to a body member, a plurality of connections within the connector each having a port opening into the flat surface of the associated body member, the slots in the circuit member being each arranged to connect together ports in the flat surfaces, and to carry fluid in a direction parallel to the flat surfaces, at least one slot being arranged to carry fluid for pilot operation of the pilot-operated valve.
Claim 2
Dependent Claim
179 words
A hydraulic apparatus including a pair of body members each having a flat surface, a hydraulic circuit member having two flat parallel surfaces, a plurality of slots in the circuit member each opening along its length to the two parallel flat surfaces, clamping means to hold the body members together with the circuit member clamped between the flat body surfaces, at least on pilotoperated valve formed on or secured to a body member, at least one port connected to carry pilot fluid for pilot operation of the pilot-operated valve, such port opening to the flat surface oF the associated body member, a multiple hydraulic connector formed on or secured to a body member, a plurality of connections within the connector each having a port opening into the flat surface of the associated body member, the slots in the circuit member being each arranged to connect together ports in the flat surfaces, and to carry fluid in a direction parallel to the flat surfaces, at least one slot being arranged to carry fluid for pilot operation of the pilot-operated valve.
Claim 3
Dependent Claim
26 words
A hydraulic apparatus as claimed in claim 1 arranged so that the slots diverge as they extend away from the connector ports to the associated ports.
Claim 4
Dependent Claim
33 words
A hydraulic apparatus as claimed in claim 2 including a selector valve connected with the multiple hydraulic connector for controlling fluid flow within the connections thereof and including control of said pilot flow.
Claim 5
Dependent Claim
34 words
A hydraulic apparatus as claimed in claim 2 wherein said multiple hydraulic connector is formed in two parts detachable one from the other, one part thereof being permanently attached to its associated body member.
Claim 6
Dependent Claim
24 words
A hydraulic apparatus as claimed in claim 4 including a plurality of flexible hoses extending from the other part of the multiple hydraulic connector.
Claim 7
Dependent Claim
33 words
A hydraulic apparatus as claimed in claim 1 including a selector valve connected with the multiple hydraulic connector for controlling fluid flow within the connections thereof and including control of said pilot flow.
Claim 8
Dependent Claim
44 words
A hydraulic apparatus as claimed in claim 6 wherein said multiple hydraulic connector is formed in two parts detachable one from the other, one part thereof being permanently attached to its associated body member and the other part being attached to the selector valve.
Claim 9
Dependent Claim
28 words
A hydraulic apparatus as claimed in claim 7 including a plurality of flexible hoses extending from said other part of the multiple hydraulic connector to the selector valve.
Claim 10
Dependent Claim
34 words
A hydraulic apparatus as claimed in claim 1 wherein said multiple hydraulic connector is formed in two parts detachable one from the other, one part thereof being permanently attached to its associated body member.
Claim 11
Dependent Claim
24 words
A hydraulic apparatus as claimed in claim 9 including a plurality of flexible hoses extending from the other part of the multiple hydraulic connector.
References Cited (Backward Citations)
US2684692A
Cited
US3472261A
Cited
US3643445A
Cited
US3547139A
Cited
US3513876A
Cited
US3587607A
Cited
US3530884A
Cited
US3664138A
Cited
US3589387A
Cited
US3556144A
Cited
US3672176A
Cited
US3623501A
Cited
US3698432A
Cited
US3760844A
Cited
US3757824A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-07 | 1978-04-08 | 1978-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-07 | 1982-04-08 | 1982-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-07 | 1986-04-08 | 1986-10-08 | $7700.00 | Window Closed / Lapsed |