US3699993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control valve for the flow to and from a variable pressure chamber
Assignee: Technomatic AG
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Filing: 1970-12-31
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Granted: 1972-10-24
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Expires: 1990-12-31
Abstract
Abstract A control valve has two valve pistons disposed on opposite sides of a straight passage which is connected at one end with an expanding and contracting pressure chamber of a hydraulic press or brake system, and has a discharge opening at the other end. The valve pistons have a first position in which fluid from the contracting pressure chamber can flow with minimal resistance through the straight passage and out of the discharge opening. In a second position of the valve pistons, the discharge opening is closed by the same, and pressure fluid can be supplied from an inlet through control valves into the straight passage and from there to the expanding pressure chamber.
Inventors
- 👤 Erich Hemon
- 👤 Erich Ruchser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:27
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/42; F16K31/423; B; B30; B30B; B30B15/00; B30B15/14; B30B15/142; F15; F15B; F15B13/00; F15B13/02; F15B13/04; F15B13/042; F15B13/043; F15B20/00; F15B20/001; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2544
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
215 words
Control valve for controlling the flow to and from a variable pressure chamber of a consumer apparatus, comprising housing means including a substantially straight passage means connected at one end with said pressure chamber, and having at the other end thereof a discharge opening, said housing means having working cylinder means laterally of said straight passage means, and supply conduit means including an inlet conduit for supplying a pressure fluid into said working cylinder means; channel means connecting said supply conduit means with a passage portion of said passage means; and valve piston means located in said working cylinder means for movement toward and away from said straight passage means between a first control position retracted from said straight passage means so that fluid from said pressure chamber flows through said straight passage means and directly out of said discharge opening, and a second control position located in said straight passage means and closing said discharge opening, said valve piston means being moved by pressure fluid in said supply conduit means and in said working cylinder means to said second control position so that said discharge opening is closed, and pressure fluid flows through said channel means into said passage portion and out of said one end into said pressure chamber for expanding the same.
Claim 2
Dependent Claim
215 words
Control valve for controlling the flow to and from a variable pressure chamber of a consumer apparatus, comprising housing means including a substantially straight passage means connected at one end with said pressure chamber, and having at the other end thereof a discharge opening, said housing means having working cylinder means laterally of said straight passage means, and supply conduit means including an inlet conduit for supplying a pressure fluid into said working cylinder means; channel means connecting said supply conduit means with a passage portion of said passage means; and valve piston means located in said working cylinder means for movement toward and away from said straight passage means between a first control position retracted from said straight passage means so that fluid from said pressure chamber flows through said straight passage means and directly out of said discharge opening, and a second control position located in said straight passage means and closing said discharge opening, said valve piston means being moved by pressure fluid in said supply conduit means and in said working cylinder means to said second control position so that said discharge opening is closed, and pressure fluid flows through said channel means into said passage portion and out of said one end into said pressure chamber for expanding the same.
Claim 3
Dependent Claim
119 words
Control valve as claimed in claim 1, wherein said working cylinder means includes two working cylinders located on opposite sides of said straight passage means; wherein said valve piston means include two valve pistons located in said working cylinders; wherein said supply conduit means includes two supply conduits respectively connecting said inlet conduit with said working cylinder; wherein said channel means includes two channels formed by said valve pistons, respectively, and communicating with said working cylinders, respectively; and wherein fluid pressure in said supply conduits and working cylinders simultaneously urges said valve pistons to said second control position for together closing said discharge opening while pressure fluid flows through said channels and straight passage means into said pressure chamber.
Claim 4
Dependent Claim
41 words
Control valve as claimed in claim 2, wherein said working cylinders form frustoconical valve seats adjacent said straight passage means; and wherein said valve pistons have inner confronting frustoconical end portions abutting said frustoconical valve seats in said second control position.
Claim 5
Dependent Claim
47 words
Control valve as claimed in claim 3, wherein said straight passage means includes a partition body dividing said discharge opening into two discharge slots; wherein said frustoconical end portions of said valve piston in said second control position abut said partition body and close said discharge slots.
Claim 6
Dependent Claim
33 words
Control valve as claimed in claim 4, wherein said working cylinders are located outward of said valve pistons and receive the end portions of said valve pistons remote from said frustoconical end portions.
Claim 7
Dependent Claim
61 words
Control valve as claimed in claim 4, wherein said frustoconical end portions have central end faces spaced from each other in said second control position and located in said passage portion; and wherein said channels extend axially of said frustoconical end portions in said valve pistons and open on said end faces for connecting said supply conduits with said passage portion.
Claim 8
Dependent Claim
48 words
Control valve as claimed in claim 2 wherein said channel means include axially extending bores in said valve pistons having partly closed outer ends; and a pressure spring located in said bores between said partly closed ends, and urging said valve pistons apart to said first control position.
Claim 9
Dependent Claim
89 words
Control valve as claimed in claim 2, wherein said channels extend between the outer and inner ends of said valve pistons, respectively; and comprising biassed check valves located in said channels, respectively, and adapted to close said channels so that said valve pistons are moved to said second control position by the pressure in said working cylinders whereupon the pressure increases in said working chambers and opens said check valves to permit flow through said channels into said passage means and out of said one end of the same.
Claim 10
Dependent Claim
76 words
Control valve as claimed in claim 2, comprising two control valves mounted in said housing means operable between an operative position opening said supply conduits, respectively, and an inoperative position closing the same so that the movements of said Valve pistons are controlled by said control valves; and wherein the ratio between the effective flow cross sections of said supply conduits controlled by said control pistons and said channels in said valve pistons is about 1:10.
Claim 11
Dependent Claim
36 words
Control valve as claimed in claim 1, comprising a valve means located in said channel means and having a closed position, and an open position for connecting said inlet conduit directly with said straight passage means.
Claim 12
Dependent Claim
57 words
Control valve as claimed in claim 10, comprising control valve means mounted on said housing means operable between an operative position connecting said inlet conduit with said working cylinder means, and an inoperative position disconnecting the same; and comprising actuating piston and cylinder means for operating said valve means under the control of said control valve means.
Claim 13
Dependent Claim
97 words
Control valve means as claimed in claim 1, wherein said working cylinder means include two working cylinders located on opposite sides of said straight passage means; wherein said valve piston means include two valve pistons located in said working cylinders, respectively; wherein said supply conduit means include two supply conduits connecting said inlet conduit with said working cylinders, respectively; and wherein said channel means include channel recesses in said valve pistons communicating with said inlet conduit and being closed in said first control position, and communicating also with said straight passage means in said second control position.
Claim 14
Dependent Claim
35 words
Control valve as claimed in claim 12, wherein said valve pistons comprise sealing rings engaging said working cylinders in said first control position for sealing said channel recesses against communication with said straight passage means.
Claim 15
Dependent Claim
24 words
Control valve as claimed in claim 12, wherein channel recesses include a plurality of channel recesses spaced circumferentially about each of said valve pistons.
Claim 16
Dependent Claim
36 words
Control valve as claimed in claim 14, wherein said channel recesses extend in the respective valve piston parallel to the axis of symmetry of the same and over a part of the length of the same.
Claim 17
Dependent Claim
21 words
Control valve as claimed in claim 12, wherein each of said channel recesses has a part-circular bottom and is segment shaped.
Claim 18
Dependent Claim
47 words
Control valve as claimed in claim 12, wherein each valve piston has a greater diameter at the outer end portion remote from said straight passage means than at the inner end portion thereof; and wherein said channel recesses are located between said inner and outer end portions.
Claim 19
Dependent Claim
192 words
Control valve as claimed in claim 1, wherein said working cylinder means include two working cylinders located on opposite sides of said straight passage means; wherein said valve piston means include two valve pistons located in said working cylinders, respectively; wherein said supply conduit means include two supply conduits connecting said inlet conduit with said working cylinders, respectively; wherein said housing means forms a pressure cylinder having ends; comprising a double piston in said pressure cylinder forming balancing chambers at said ends of said pressure cylinder and being movable between a central inoperative position, and two end positions; a stop motion switch actuated by said double piston in said end positions; wherein said housing means has first ducts connecting said supply conduits with said balancing chambers, respectively, and second ducts connected with said balancing chambers, respectively, and communicating with said straight passage means in said first control positions of said valve pistons, and being closed, respectively, by the respective valve piston in said second control position of the same whereby malfunctions of any valve piston causes movement of said double piston to one end position and actuation of said stop motion switch.
Claim 20
Dependent Claim
62 words
Control valve as claimed in claim 18, wherein said valve pistons have confronting inner ends; wherein said housing means include valve seats for said inner ends engageD by the same in said second control position; and wherein said second ducts open in said valve seats, respectively, and are closed by the respective valve piston in said second control position of the same.
Claim 21
Dependent Claim
26 words
Control valve as claimed in claim 18, comprising check valves in said first ducts for blocking flow from said balancing chambers into said supply conduits, respectively.
Claim 22
Dependent Claim
15 words
Control valve as claimed in claim 18, comprising throttle means in said first ducts, respectively.
Claim 23
Dependent Claim
121 words
Control valve as claimed in claim 1 wherein said housing means has a top portion in which said one end of said straight passage means forms an opening communicating with said variable pressure chamber, and a bottom portion in which the other end of said straight passage means forms said discharge opening; wherein said valve piston means are movable in a direction transverse to said straight passage means; and wherein said supply conduit means are located in a plane transverse to said straight passage means; and further comprising control valve means mounted in said housing means operable for opening and closing said supply conduit means so that the movements of said valve piston means are controlled by said control valve means.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |