ES369424A1 - Fluid flow control instrumentality - Google Patents
Fluid flow control instrumentalityInfo
- Publication number
- ES369424A1 ES369424A1 ES369424A ES369424A ES369424A1 ES 369424 A1 ES369424 A1 ES 369424A1 ES 369424 A ES369424 A ES 369424A ES 369424 A ES369424 A ES 369424A ES 369424 A1 ES369424 A1 ES 369424A1
- Authority
- ES
- Spain
- Prior art keywords
- valve
- motor
- pressure
- spool
- exhaust
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/044—Removal or measurement of undissolved gas, e.g. de-aeration, venting or bleeding
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/8593—Systems
- Y10T137/87169—Supply and exhaust
- Y10T137/87177—With bypass
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Fluid-Pressure Circuits (AREA)
- Safety Valves (AREA)
Abstract
In a valve mechanism for controlling doubleacting motor 7, fluid pump 12 passes via check valve 18, passage 15 and line 17 to chamber 16 whence it is admitted to one side or the other of the motor upon raising of spool 19 or 20 by actuation of pilot valve 8 to pressurize port C1 or C2. The other port is simultaneously depressurized to allow the other spool to be lowered by work port pressure applied there above via 34, 35 to exhaust the other side of the motor. When the motor is acting against a load, delivery pressure at 15 is high and acts via 60 on plunger 61 to unseat valve 51 to provide an exhaust path via 30, 53, 52, 13. When the load assists the motor pressure at 15 falls whereas that at 52 rises and the pressure differential across valve 50 eventually unseats the latter to allow the exhaust fluid to flow to 15 thereby supplementing the pump output and preventing void formation in the motor. The exhaust fluid also flows via 67, 68, 57, 69 to assist in keeping pilot operated pump unloader valve 48 closed, and via 43 and pilot valve 8 to assist in keeping the operative spool raised. In Fig. 2, pressure rise at 52 eventually moves valve 80 leftwards and acts in chamber 57 to bias relief valve 72 closed. Valve 80 may be embodied in the relief valve.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US78362268A | 1968-12-13 | 1968-12-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES369424A1 true ES369424A1 (en) | 1971-05-16 |
Family
ID=25129888
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES369424A Expired ES369424A1 (en) | 1968-12-13 | 1969-07-11 | Fluid flow control instrumentality |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US3534775A (en) |
| BE (1) | BE742228A (en) |
| DE (1) | DE1955862A1 (en) |
| ES (1) | ES369424A1 (en) |
| FR (1) | FR2026047A1 (en) |
| GB (1) | GB1217304A (en) |
| NL (1) | NL6917223A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4041836A (en) * | 1974-05-08 | 1977-08-16 | Hikaru Murata | Open circuit type acceleration/deceleration device |
| DE2916507A1 (en) * | 1979-04-24 | 1980-11-13 | Bosch Gmbh Robert | MULTI-CIRCUIT PROTECTION VALVE UNIT |
| US4338962A (en) * | 1980-08-13 | 1982-07-13 | Commercial Shearing, Inc. | Control and relief valves |
| JP7095589B2 (en) * | 2018-12-26 | 2022-07-05 | 株式会社豊田自動織機 | Hydraulic drive for industrial vehicles |
-
1968
- 1968-12-13 US US3534775D patent/US3534775A/en not_active Expired - Lifetime
-
1969
- 1969-06-26 GB GB3240469A patent/GB1217304A/en not_active Expired
- 1969-07-11 ES ES369424A patent/ES369424A1/en not_active Expired
- 1969-11-06 DE DE19691955862 patent/DE1955862A1/en active Pending
- 1969-11-15 NL NL6917223A patent/NL6917223A/xx unknown
- 1969-11-26 BE BE742228D patent/BE742228A/xx unknown
- 1969-12-02 FR FR6941607A patent/FR2026047A1/fr not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| GB1217304A (en) | 1970-12-31 |
| BE742228A (en) | 1970-05-04 |
| US3534775A (en) | 1970-10-20 |
| FR2026047A1 (en) | 1970-09-11 |
| DE1955862A1 (en) | 1970-07-02 |
| NL6917223A (en) | 1970-06-16 |
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