GB1383794A – Hydraulic actuators
– Google Patents
GB1383794A – Hydraulic actuators
– Google Patents
Hydraulic actuators
Info
Publication number
GB1383794A
GB1383794A
GB2737972A
GB2737972A
GB1383794A
GB 1383794 A
GB1383794 A
GB 1383794A
GB 2737972 A
GB2737972 A
GB 2737972A
GB 2737972 A
GB2737972 A
GB 2737972A
GB 1383794 A
GB1383794 A
GB 1383794A
Authority
GB
United Kingdom
Prior art keywords
valve
fluid
pistons
reservoir
check
Prior art date
1972-06-12
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
GB2737972A
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.)
King A W G
SURECAST DEVELOPMENTS Ltd
Original Assignee
King A W G
SURECAST DEVELOPMENTS Ltd
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.)
1972-06-12
Filing date
1972-06-12
Publication date
1974-02-12
1972-06-12
Application filed by King A W G, SURECAST DEVELOPMENTS Ltd
filed
Critical
King A W G
1972-06-12
Priority to GB2737972A
priority
Critical
patent/GB1383794A/en
1974-02-12
Publication of GB1383794A
publication
Critical
patent/GB1383794A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
F15B7/00—Systems in which the movement produced is definitely related to the output of a volumetric pump; Telemotors
F15B7/04—In which the ratio between pump stroke and motor stroke varies with the resistance against the motor
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
F15B11/028—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the actuating force
F15B11/032—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the actuating force by means of fluid-pressure converters
F15B11/0325—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the actuating force by means of fluid-pressure converters the fluid-pressure converter increasing the working force after an approach 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
F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
F15B15/18—Combined units comprising both motor and pump
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
F15B2211/214—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge the pressure sources being hydrotransformers
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
F15B2211/50—Pressure control
F15B2211/505—Pressure control characterised by the type of pressure control means
F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
F15B2211/50518—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using pressure relief 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
F15B2211/50—Pressure control
F15B2211/515—Pressure control characterised by the connections of the pressure control means in the circuit
F15B2211/5151—Pressure control characterised by the connections of the pressure control means in the circuit being connected to a pressure source 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
F15B2211/50—Pressure control
F15B2211/55—Pressure control for limiting a pressure up to a maximum pressure, e.g. by using a pressure relief 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
F15B2211/70—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
F15B2211/7052—Single-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
Abstract
1383794 Hydraulic actuators; reciprocating pumps SURECAST DEVELOPMENTS Ltd and A W G KING 24 July 1973 [12 June 1972] 27379/72 Headings F1A and F1D Fluid is supplied to a pair of pistons 36 in a cylinder 35 by a pump piston 7 and the fluid initially flows past a closed check-valve 19, an open check-valve 31 and through a bore 26. When the resistance to the movement of pistons 36 increases, back pressure lifts a seal 34 from a seat 21 thus allowing the check-valve 31, which has been held open by a member 22, to close. Fluid now passes to the underside of a differential piston 25, 27 so that as piston 25 is raised a higher pressure is applied between the pistons 36. At a higher preset pressure a relief valve 37 opens allowing fluid to return to a reservoir 13. When this occurs a ball 42 moves a reset knob 45 upwards and is held in the open position by a plunger 40 until reset against the action of a spring 43a. The reservoir 13 contains a bladder 14 which inflates due to atmospheric pressure as liquid is drawn from the reservoir.
GB2737972A
1972-06-12
1972-06-12
Hydraulic actuators
Expired
GB1383794A
(en)
Priority Applications (1)
Application Number
Priority Date
Filing Date
Title
GB2737972A
GB1383794A
(en)
1972-06-12
1972-06-12
Hydraulic actuators
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
GB2737972A
GB1383794A
(en)
1972-06-12
1972-06-12
Hydraulic actuators
Publications (1)
Publication Number
Publication Date
GB1383794A
true
GB1383794A
(en)
1974-02-12
Family
ID=10258653
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB2737972A
Expired
GB1383794A
(en)
1972-06-12
1972-06-12
Hydraulic actuators
Country Status (1)
Country
Link
GB
(1)
GB1383794A
(en)
Cited By (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US4248077A
(en)
*
1979-11-26
1981-02-03
Gregory Jack T
Jaw for riveter
US4263801A
(en)
*
1979-09-10
1981-04-28
Gregory Jack T
Hydraulic riveter
GB2155104A
(en)
*
1984-03-03
1985-09-18
Michael Hung
A jack incorporating a fluid sac
1972
1972-06-12
GB
GB2737972A
patent/GB1383794A/en
not_active
Expired
Cited By (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US4263801A
(en)
*
1979-09-10
1981-04-28
Gregory Jack T
Hydraulic riveter
US4248077A
(en)
*
1979-11-26
1981-02-03
Gregory Jack T
Jaw for riveter
GB2155104A
(en)
*
1984-03-03
1985-09-18
Michael Hung
A jack incorporating a fluid sac
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Legal Events
Date
Code
Title
Description
1975-06-25
PS
Patent sealed
1978-09-06
732
Registration of transactions, instruments or events in the register (sect. 32/1977)
1980-03-12
PCNP
Patent ceased through non-payment of renewal fee
