US3642019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for controlling the flow from two outlets
Assignee: Robert Bosch GmbH
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Filing: 1970-05-28
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Granted: 1972-02-15
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Expires: 1990-05-28
Abstract
Abstract A spring-biased regulating valve directs fluid from a pump at a constant pressure to a first outlet up to a certain amount required by a consumer apparatus, and directs at the same time excess fluid to a second outlet. When the pressure in the first outlet rises above the desired constant value, a biased control valve responds to the pressure increase and causes the regulating valve to direct all the fluid from the pump to the second outlet until the pressure in the first outlet has again its desired constant value.
Inventors
- 👤 Manfred Kramer
- 👤 Heinz Flaschar
- 👤 Georg Antonulas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:31
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/022; G; G05; G05D; G05D7/00; G05D7/01; G05D7/0126; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2514; Y10T137/2521; Y10T137/2524; Y10T137/2559; Y10T137/2574; Y10T137/2579; Y10T137/2587
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
282 words
Apparatus for controlling the flow from two outlets comprising supply means for a pressure fluid; regulating valve means having an inlet receiving pressure fluid from said supply means, first and second outlets, a first regulating chamber, biasing means in said regulating chamber for urging said regulating valve means in one direction to a first regulating position connecting said inlet with said first and second outlets, and a second regulating chamber communicating with said first outlet and receiving fluid therefrom for urging said regulating valve means in the opposite direction to a second regulating position connecting only said second outlet with said inlet; and control valve means having a control inlet communicating with said first outlet, and a return outlet communicating with said supply means for returning fluid to the same, said control valve means being biased to a first control position connecting said first outlet with said first regulating chamber and supplying fluid to the latter for holding said regulating valve means in said first regulating position, and being moved to a second control position when the pressure in said first outlet exceeds a predetermined value, said control valve means in said second position connecting said first regulating chamber with said return outlet and disconnecting said first regulating chamber from said first outlet so that the pressure fluid in said second regulating chamber moves said regulating valve means to said second regulating position, said biased control valve means returning to said first control position when the pressure in said first outlet drops so that said first regulating chamber is disconnected from said return outlet and connected with said first outlet whereby said regulating valve means is moved to said first regulating position.
Claim 2
Dependent Claim
282 words
Apparatus for controlling the flow from two outlets comprising supply means for a pressure fluid; regulating valve means having an inlet receiving pressure fluid from said supply means, first and second outlets, a first regulating chamber, biasing means in said regulating chamber for urging said regulating valve means in one direction to a first regulating position connecting said inlet with said first and second outlets, and a second regulating chamber communicating with said first outlet and receiving fluid therefrom for urging said regulating valve means in the opposite direction to a second regulating position connecting only said second outlet with said inlet; and control valve means having a control inlet communicating with said first outlet, and a return outlet communicating with said supply means for returning fluid to the same, said control valve means being biased to a first control position connecting said first outlet with said first regulating chamber and supplying fluid to the latter for holding said regulating valve means in said first regulating position, and being moved to a second control position when the pressure in said first outlet exceeds a predetermined value, said control valve means in said second position connecting said first regulating chamber with said return outlet and disconnecting said first regulating chamber from said first outlet so that the pressure fluid in said second regulating chamber moves said regulating valve means to said second regulating position, said biased control valve means returning to said first control position when the pressure in said first outlet drops so that said first regulating chamber is disconnected from said return outlet and connected with said first outlet whereby said regulating valve means is moved to said first regulating position.
Claim 3
Dependent Claim
30 words
Apparatus as claimed in claim 1 comprising a pressure-responsive check valve connecting said second outlet with said return outlet when the pressure in said second outlet exceeds a predetermined pressure.
Claim 4
Dependent Claim
152 words
Apparatus as claimed in claim 1 wherein said control valve means includes a control valve slide, and a control valve cylinder in which said control valve slide moves between said first and second control positions, wherein said control valve slide forms in said control valve cylinder a first control chamber at one end and a second control chamber at the other end of said control valve cylinder, said first control chamber being connected with said first outlet, and said second control chamber being connected with said return outlet, and comprising first and second control conduit means connecting said first regulating chamber with said control valve cylinder, said first control conduit means connecting said first control chamber in said first control position with said first regulating chamber, and said second control conduit means connecting in said second control position said first regulating chamber with said second control chamber and with said return conduit.
Claim 5
Dependent Claim
52 words
Apparatus as claimeD in claim 3 wherein said control valve cylinder has an annular recess surrounding said control valve slide and communicating with said first control conduit means; and wherein said control valve slide is formed with ducts connecting in said first control position said first control chamber with said annular recess.
Claim 6
Dependent Claim
52 words
Apparatus as claimed in claim 4 wherein said control valve slide has an annular recess communicating in said first and second control positions with said second control conduit means, and communicating in said second control position with said second control chamber for connecting said second control conduit means with said return outlet.
Claim 7
Dependent Claim
138 words
Apparatus as claimed in claim 5 wherein said regulating valve means includes a regulating valve cylinder and a regulating valve slide movable in said cylinder and forming said first and second regulating chambers at the ends thereof; wherein said inlet and said first and second outlet communicate with said regulating valve cylinder; comprising a throttle means in said first outlet dividing the same into a first outlet portion communicating with said regulating valve cylinder and a second portion adapted to communicate with hydraulic consumer means requiring a constant fluid flow wherein said first outlet portion communicates with said second regulating chamber and said second outlet portion communicates with said first control chamber; and comprising a pressure responsive check valve connecting said second outlet with said return outlet when the pressure in said second outlet exceeds a predetermined pressure.
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) | 1975-02-14 | 1975-08-16 | 1976-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-14 | 1979-08-16 | 1980-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-14 | 1983-08-16 | 1984-02-15 | $7700.00 | Window Closed / Lapsed |