GB403471A - Improvements in hydraulic jacks and other hydraulic apparatus - Google Patents

Improvements in hydraulic jacks and other hydraulic apparatus

Info

Publication number
GB403471A
GB403471A GB2324232A GB2324232A GB403471A GB 403471 A GB403471 A GB 403471A GB 2324232 A GB2324232 A GB 2324232A GB 2324232 A GB2324232 A GB 2324232A GB 403471 A GB403471 A GB 403471A
Authority
GB
United Kingdom
Prior art keywords
plunger
chamber
hydraulic
pump chamber
lifting
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
GB2324232A
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.)
JAMES PERCIVAL PEEL
Original Assignee
JAMES PERCIVAL PEEL
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 JAMES PERCIVAL PEEL filed Critical JAMES PERCIVAL PEEL
Priority to GB2324232A priority Critical patent/GB403471A/en
Publication of GB403471A publication Critical patent/GB403471A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
    • B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
    • B66F3/25—Constructional features
    • B66F3/26—Adaptations or arrangements of pistons
    • 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
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/022—Systems essentially incorporating special features for controlling the speed or actuating force of an output member in which a rapid approach stroke is followed by a slower, high-force working stroke
    • 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
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/024—Systems essentially incorporating special features for controlling the speed or actuating force of an output member by means of differential connection of the servomotor lines, e.g. regenerative circuits
    • 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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/204—Control means for piston speed or actuating force without external control, e.g. control valve inside the piston
    • 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
    • F15B2211/7053—Double-acting output members
    • 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
    • F15B2211/775—Combined control, e.g. control of speed and force for providing a high speed approach stroke with low force followed by a low speed working stroke with high force, e.g. for a hydraulic press

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Structural Engineering (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

403,471. Regulating delivery of pumps by by-passes. PEEL, J. P., and KINGSLEY, S., 65, Skinner Lane, Leeds. Aug. 19, 1932, No. 23242. [Class 102 (i).] In lifting-jacks and other hydraulic apparatus, in order to reduce the speed of lifting &c. when the load is taken up, or when the load exceeds a certain value, the single-acting pump-plunger 1 is formed with passages 5, 6, controlled for example by ball valves 7a, 7b. On the working stroke, if the pressure is sufficient to open the valve 7a part of the liquid passes from the pump chamber A to the chamber B behind the plunger and the effective area of the plunger 1 is the area of the rod 3. On the return stroke, liquid returns from the chamber B to the pump chamber A and additional liquid is drawn into the pump chamber through the suction valve (not shown).
GB2324232A 1932-08-19 1932-08-19 Improvements in hydraulic jacks and other hydraulic apparatus Expired GB403471A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2324232A GB403471A (en) 1932-08-19 1932-08-19 Improvements in hydraulic jacks and other hydraulic apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2324232A GB403471A (en) 1932-08-19 1932-08-19 Improvements in hydraulic jacks and other hydraulic apparatus

Publications (1)

Publication Number Publication Date
GB403471A true GB403471A (en) 1933-12-28

Family

ID=10192464

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2324232A Expired GB403471A (en) 1932-08-19 1932-08-19 Improvements in hydraulic jacks and other hydraulic apparatus

Country Status (1)

Country Link
GB (1) GB403471A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007069905A3 (en) * 2005-12-15 2007-08-16 Tdw Offshore Services As Smart compensator

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007069905A3 (en) * 2005-12-15 2007-08-16 Tdw Offshore Services As Smart compensator
GB2448252A (en) * 2005-12-15 2008-10-08 Tdw Offshore Services As Smart compensator
GB2448252B (en) * 2005-12-15 2011-08-03 Tdw Offshore Services As Smart compensator

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