GB957596A - Improvements in pneumatic jacks - Google Patents

Improvements in pneumatic jacks

Info

Publication number
GB957596A
GB957596A GB3919962A GB3919962A GB957596A GB 957596 A GB957596 A GB 957596A GB 3919962 A GB3919962 A GB 3919962A GB 3919962 A GB3919962 A GB 3919962A GB 957596 A GB957596 A GB 957596A
Authority
GB
United Kingdom
Prior art keywords
piston
stroke
reservoir
jack
rate
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
Application number
GB3919962A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CIE PARISIENNE OUTIL AIR COMPR
Compagnie Parisienne dOutillage a Air Comprime SA
Original Assignee
CIE PARISIENNE OUTIL AIR COMPR
Compagnie Parisienne dOutillage a Air Comprime SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by CIE PARISIENNE OUTIL AIR COMPR, Compagnie Parisienne dOutillage a Air Comprime SA filed Critical CIE PARISIENNE OUTIL AIR COMPR
Publication of GB957596A publication Critical patent/GB957596A/en
Expired legal-status Critical Current

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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/06—Servomotor systems without provision for follow-up action; Circuits therefor involving features specific to the use of a compressible medium, e.g. air, steam
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/21—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge
    • F15B2211/212—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge the pressure sources being accumulators
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30505—Non-return valves, i.e. check valves
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40515—Flow control characterised by the type of flow control means or valve with variable throttles or orifices
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/415—Flow control characterised by the connections of the flow control means in the circuit
    • F15B2211/41527—Flow control characterised by the connections of the flow control means in the circuit being connected to an output member and a directional control valve
    • F15B2211/41536—Flow control characterised by the connections of the flow control means in the circuit being connected to an output member and a directional control valve being connected to multiple ports of an output member
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/415—Flow control characterised by the connections of the flow control means in the circuit
    • F15B2211/41554—Flow control characterised by the connections of the flow control means in the circuit being connected to a return line and a directional control valve
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/46—Control of flow in the return line, i.e. meter-out control
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
  • Prostheses (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)

Abstract

957,596. Pneumatic jacks. COMPAGNIE PARISIENNE D'OUTILLAGE A AIR COMPRIME. Oct. 16, 1962 [Oct. 16, 1961], No. 39199/62. Heading F1P. [Also in Division G3] A pneumatic jack having maximum power and speed at the start of both the forward and return strokes has the side 5 of the piston 3, Fig. 1, connected to a distributer 6 which is adapted to communicate with either a pressure source 7 or atmosphere 8 and the other side 10 connected to a reservoir 11, an escape path 13 being provided between the side 5 and the composite volume formed by the side 10 and reservoir. As shown in Fig. 2, the reservoir 11 is incorporated in the piston rod 4 and is in communication with the side 10 through an orifice 20. The rate of flow along the escape path is controlled by means of a throttle formed by a helical groove on a plunger 29, the plunger being adjustable by screw means along a stepped axial bore in the piston so as to vary the effective length of groove. Damping at the end of each stroke is effected by means of ducts 22, 23 and 25, 26 provided with throttling adjustments. To operate the jack, the side 5 is connected with the air supply 7 and as the piston moves along its stroke, the power of the jack decreases owing to compression of the volume of air at the side 10 and in the reservoir, the throttling device in the escape path 13 operating so that the pressures on each side of the piston become balanced on completion of the stroke. The return stroke is effected by connecting the side 5 with atmosphere and as the piston moves along its stroke, the power of the jack decreases at a rate depending on the rate of escape through the path 13 and the rate of exhaust through adjustable reducing means 9; at the end of the return stroke the pressures on each side of the piston are balanced. A duct 35 is provided to expand piston packings 33, 33a. In another embodiment, Fig. 4, the reservoir is disposed externally and adapted to receive the escape path 44, 46 controlled by reducing means 45; instead of single reducing means 45 to serve both forward and return strokes, additional reducing means 45a together with non-return valves 47, 47a may be employed.
GB3919962A 1961-10-16 1962-10-16 Improvements in pneumatic jacks Expired GB957596A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR876039A FR1312482A (en) 1961-10-16 1961-10-16 Improvements to pneumatic cylinders

Publications (1)

Publication Number Publication Date
GB957596A true GB957596A (en) 1964-05-06

Family

ID=8764725

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3919962A Expired GB957596A (en) 1961-10-16 1962-10-16 Improvements in pneumatic jacks

Country Status (4)

Country Link
BE (1) BE623629A (en)
ES (1) ES281595A1 (en)
FR (1) FR1312482A (en)
GB (1) GB957596A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2517382A1 (en) * 1981-11-27 1983-06-03 Therond Marcel Circuit to recover compressed air from ram - has some exhausted air fed back to tank and remainder to atmosphere
FR2547015B1 (en) * 1983-06-06 1985-07-26 Amri ACTUATOR WITH PNEUMATIC ENERGY ACCUMULATOR, PARTICULARLY FOR TAP

Also Published As

Publication number Publication date
FR1312482A (en) 1962-12-21
BE623629A (en)
ES281595A1 (en) 1963-04-16

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