ES415981A1 - Improvements introduced in a separate control valve device for arms of load handling machines. (Machine-translation by Google Translate, not legally binding) - Google Patents
Improvements introduced in a separate control valve device for arms of load handling machines. (Machine-translation by Google Translate, not legally binding)Info
- Publication number
- ES415981A1 ES415981A1 ES415981A ES415981A ES415981A1 ES 415981 A1 ES415981 A1 ES 415981A1 ES 415981 A ES415981 A ES 415981A ES 415981 A ES415981 A ES 415981A ES 415981 A1 ES415981 A1 ES 415981A1
- Authority
- ES
- Spain
- Prior art keywords
- fluid
- pressure
- control
- pressurized chamber
- seat
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/18—Control systems or devices
-
- 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
- F15B13/01—Locking-valves or other detent i.e. load-holding devices
-
- 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
- F15B13/01—Locking-valves or other detent i.e. load-holding devices
- F15B13/015—Locking-valves or other detent i.e. load-holding devices using an enclosed pilot flow valve
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Fluid-Driven Valves (AREA)
- Multiple-Way Valves (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
Perfections introduced in a separate control valve device for arms of load handling machines, for the control by hydraulic jack of the gravity descent movement of a mobile work organ, characterized in that said device comprises: a first pressurized chamber that receives a first fluid under pressure, or control fluid; a control piston, which slides in the first chamber under the pressure of the first fluid; a second pressurized chamber that receives a second fluid under pressure or working fluid from the jack, this second chamber being constituted by an intake part, and an exhaust part, and constituting the seat of a valve member that slides in the part of admission, the separation between the intake part and the exhaust part; a rod integral with the piston, and sliding tightly and tightly in a hole made through the wall separating the first pressurized chamber of the second pressurized chamber, allowing this stem to separate the valve member from its seat, in the course of a piston displacement of the first pressurized chamber, under the action, of the first control fluid or fluid, which allows the second fluid contained in the lower capacity of the circular descent jack, through the valve member thus separated from its seat, in return to an appropriate tank, and this valve member being normally held against its seat, in the absence of the pressure of the first fluid on the control piston, by the counter-pressure of the second fluid that reigns in the of admission of the second pressurized chamber and in the lower capacity of the lowering jack, and/or by an appropriate spring means; a calibrated orifice located at the exit of the exhaust part of the second pressurized chamber, which allows to regulate by preselection of the outlet section of the second fluid through this orifice, the speed of descent of the work organ by simple gravity; and in that the active surface of the control piston receiving the pressure of the first fluid is sufficient to cause a force capable of separating the valve member from its seat, despite the counter-pressure exerted on this valve by the second fluid; and because the natures and levels of pressure of the first and second fluids are independent, which allows using two completely separate fluid circuits for the control of the valve organ, on the one hand, and for the work of the cat, on the other hand part. (Machine-translation by Google Translate, not legally binding)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7320234A FR2231910A1 (en) | 1973-06-04 | 1973-06-04 | Control valve for hydraulic jack of crane jib - has piston operated by low pressure oil to control main oil flow |
Publications (1)
Publication Number | Publication Date |
---|---|
ES415981A1 true ES415981A1 (en) | 1976-05-16 |
Family
ID=9120466
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES415981A Expired ES415981A1 (en) | 1973-06-04 | 1973-06-16 | Improvements introduced in a separate control valve device for arms of load handling machines. (Machine-translation by Google Translate, not legally binding) |
Country Status (3)
Country | Link |
---|---|
ES (1) | ES415981A1 (en) |
FR (1) | FR2231910A1 (en) |
IT (1) | IT989217B (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2642337C3 (en) * | 1976-09-21 | 1984-01-19 | Danfoss A/S, 6430 Nordborg | Control device for a double-acting hydraulic motor |
DE2735558A1 (en) * | 1977-08-06 | 1979-02-15 | Bosch Gmbh Robert | CONTROL UNIT FOR HYDRAULIC WORK EQUIPMENT |
DE2735559C2 (en) * | 1977-08-06 | 1986-10-30 | Robert Bosch Gmbh, 7000 Stuttgart | Electro-hydraulic control unit for a hydraulically driven work device |
IT1118648B (en) * | 1979-05-18 | 1986-03-03 | Chs Cinotto Giuseppe Hydraulic | SAFETY DEVICE FOR HYDRAULIC CIRCUITS, ESPECIALLY OF LIFT AND SIMILAR EXCAVATORS |
FR2473584A1 (en) * | 1980-01-14 | 1981-07-17 | Missioux Jean Leon | Safety interlock for crane operated mechanical grabs - has jacks with associated valve caps for protection and operated by electromagnetic valve with switch near operator |
FR2485104B1 (en) * | 1980-03-31 | 1986-05-23 | Meca Ind Ind Agricoles Atel | IMPROVEMENTS TO HYDRAULIC SAFETY DEVICES FOR HYDRAULIC MOTORS |
US5381822A (en) * | 1993-11-26 | 1995-01-17 | Dana Corporation | Relief valve with hydraulic fuse |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1240350A (en) * | 1958-11-14 | 1960-09-02 | Thomson Houston Comp Francaise | Improvements to turbine valves |
FR1327214A (en) * | 1962-04-05 | 1963-05-17 | Applic Mach Motrices | Automatic safety controls by double pressure pump |
DE1550454A1 (en) * | 1966-08-11 | 1969-10-09 | Parker Hannifin Corp | Flow control valve, especially for a pressure medium motor |
DE1943693C3 (en) * | 1969-08-28 | 1981-07-16 | Robert Bosch Gmbh, 7000 Stuttgart | Spring loaded check valve |
-
1973
- 1973-06-04 FR FR7320234A patent/FR2231910A1/en active Granted
- 1973-06-15 IT IT2544673A patent/IT989217B/en active
- 1973-06-16 ES ES415981A patent/ES415981A1/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR2231910A1 (en) | 1974-12-27 |
FR2231910B1 (en) | 1976-06-11 |
IT989217B (en) | 1975-05-20 |
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