Patent US840457A successfully refreshed from Google Patents.
US4285779A
Expired / Lapsed
US
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Method of making a fluid circuit device
Assignee: Azbil Corp
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Filing: 1979-05-09
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Granted: 1981-08-25
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Expires: 1999-05-09
Abstract
Abstract A fluid circuit device provided with a fluid circuit formed by a base member and a thin sheet integrally electrocast on said base member and methods for producing the fluid circuit device with parallel and non-parallel fluid circuits.
Inventors
- 👤 Tatsuhide Shiga
- 👤 Yoshihiro Tsuruoka
- 👤 Motoo Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:32
CPC Classifications
F; F16; F16L; F16L9/00; F16L9/18
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
142 words
A method for making a fluid circuit device including the steps of preparing a base plate with holes in predetermined locations, preparing a mould in which grooves are formed corresponding in size, shape and pattern of the fluid circuit, placing the mould on the surface of the base plate in a predetermined position with the holes in the base plate being aligned with respective ones of the grooves in the mould, filling the grooves in the mould with a soluble substance through the holes in the base plate, allowing the soluble substance to soldify, removing the mould from the base plate while leaving the soluble substance on the base plate, depositing a metallic plating on the surface of the solidified soluble substance and the base plate and removing the soluble substance from the base plate through the holes in the base plate.
Claim 2
Independent Claim
142 words
A method for making a fluid circuit device including the steps of preparing a base plate with holes in predetermined locations, preparing a mould in which grooves are formed corresponding in size, shape and pattern of the fluid circuit, placing the mould on the surface of the base plate in a predetermined position with the holes in the base plate being aligned with respective ones of the grooves in the mould, filling the grooves in the mould with a soluble substance through the holes in the base plate, allowing the soluble substance to soldify, removing the mould from the base plate while leaving the soluble substance on the base plate, depositing a metallic plating on the surface of the solidified soluble substance and the base plate and removing the soluble substance from the base plate through the holes in the base plate.
Claim 3
Dependent Claim
16 words
A method as set forth in claim 1 wherein said metallic plating is deposited by electrocasting.
Claim 4
Dependent Claim
48 words
A method as set forth in claim 1 and including the further step of depositing an electrically conductive layer on the surface of the solidified soluble substance and base plate after removal of the mould for electricable non-conductive materials used for the soluble substance and the base plate.
Claim 5
Dependent Claim
16 words
A method as set forth in claim 1 wherein said solidified substance is removed by melting.
Claim 6
Dependent Claim
90 words
A method for making a fluid circuit device as set forth in claim 7 and including further steps of providing at least two holes in the base plate which holes are not aligned with grooves in the mould an positioning a soluble substance in the form of a free-standing element bridging and covering said last-mentioned holes after the mould is removed from said base plate whereby said metallic plating is also applied to the free-standing element and removing the free-standing element concurrently with the soluble substance formed by the mould.
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) | 1984-08-24 | 1985-02-23 | 1985-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-24 | 1989-02-23 | 1989-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-24 | 1993-02-23 | 1993-08-25 | $7700.00 | Window Closed / Lapsed |