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GB1473123A - - Google Patents

Info

Publication number
GB1473123A
GB1473123A GB3387074A GB3387074A GB1473123A GB 1473123 A GB1473123 A GB 1473123A GB 3387074 A GB3387074 A GB 3387074A GB 3387074 A GB3387074 A GB 3387074A GB 1473123 A GB1473123 A GB 1473123A
Authority
GB
United Kingdom
Prior art keywords
valve
chambers
liquid
pump
pilot
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
GB3387074A
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 filed Critical
Publication of GB1473123A publication Critical patent/GB1473123A/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
    • F15B7/00—Systems in which the movement produced is definitely related to the output of a volumetric pump; Telemotors
    • F15B7/003—Systems in which the movement produced is definitely related to the output of a volumetric pump; Telemotors with multiple outputs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C3/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith and intended primarily for transmitting lifting forces to loose materials; Grabs
    • B66C3/14—Grabs opened or closed by driving motors thereon
    • B66C3/16—Grabs opened or closed by driving motors thereon by fluid motors
    • 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
    • F15B7/005—With rotary or crank input
    • F15B7/006—Rotary pump input

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

1473123 Fluid-pressure control circuits PEINER MASCHINEN UND SCHRAUBENWERKE A G 31 July 1974 [31 July 1973] 33870/74 Heading F1P A pair of actuators 15, 16, Fig. 1, are extended and retracted by a reversible pump 1 and the difference in volumn between the chambers on opposite sides of the pistons is compensated for by returning excess liquid to a reservoir 26 or switching extra liquid therefrom. If the pump is driven to supply liquid to the chambers 11, 12, return flow from chambers 13, 14 is blocked by a pilot-operated check-valve 19 until pressure in the supply line 4 rises to a value high enough to displace a piston 20 through a pilot line 21, so that the valve 19 is opened. Liquid now returns through lines 17, 32, excess returning to the reservoir through a pilot operated check-valve 36, which can open when a pilot line 31 is connected to the reservoir when the piston 20 opens valve 19. If the pump is reversed, pressure in a pilot line 44 opens a check-valve 45 so that liquid from chambers 11, 12 is returned to the pump through lines 9, 4. Extra liquid is drawn from the reservoir through a valve 2. Valves 19, 45 are hydraulically locked against reverse rotation of the pump by pilot lines which lead to both sides of the operating pistons. In the embodiment shown in Fig. 2 liquid from the chambers 11, 12 is returned directly to chambers 13, 14, through lines 29, 28 and pilotcontrolled check-valve 27, without passing through the pump.
GB3387074A 1973-07-31 1974-07-31 Expired GB1473123A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2339203A DE2339203A1 (en) 1973-07-31 1973-07-31 CONTROL DEVICE FOR MOTORHYDRAULIC GRIPPERS

Publications (1)

Publication Number Publication Date
GB1473123A true GB1473123A (en) 1977-05-11

Family

ID=5888715

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3387074A Expired GB1473123A (en) 1973-07-31 1974-07-31

Country Status (5)

Country Link
DE (1) DE2339203A1 (en)
GB (1) GB1473123A (en)
IT (1) IT1017474B (en)
NO (1) NO742759L (en)
SE (1) SE7409792L (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2236361A (en) * 1989-09-08 1991-04-03 Ingersoll Rand Co Closed loop hydraulic fluid system
ES2070745A2 (en) * 1992-05-15 1995-06-01 Hoerbiger Ventilwerke Ag Controlling hydraulic actuators
GB2332480A (en) * 1997-12-16 1999-06-23 Smiths Industries Plc Hydraulic apparatus
CN100572255C (en) * 2006-06-09 2009-12-23 上海起帆科技股份有限公司 The opening-closing control mechanism of single rope grab

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106246624A (en) * 2016-08-31 2016-12-21 莱州市蔚仪试验器械制造有限公司 The pressure holding circuit device of sample pointing machine

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2236361A (en) * 1989-09-08 1991-04-03 Ingersoll Rand Co Closed loop hydraulic fluid system
GB2236361B (en) * 1989-09-08 1993-12-01 Ingersoll Rand Co Closed loop hydraulic fluid system
ES2070745A2 (en) * 1992-05-15 1995-06-01 Hoerbiger Ventilwerke Ag Controlling hydraulic actuators
GB2266930B (en) * 1992-05-15 1995-12-20 Hoerbiger Ventilwerke Ag Hydraulic arrangement for a vehicle cover
GB2332480A (en) * 1997-12-16 1999-06-23 Smiths Industries Plc Hydraulic apparatus
CN100572255C (en) * 2006-06-09 2009-12-23 上海起帆科技股份有限公司 The opening-closing control mechanism of single rope grab

Also Published As

Publication number Publication date
SE7409792L (en) 1975-02-03
IT1017474B (en) 1977-07-20
NO742759L (en) 1975-02-24
DE2339203A1 (en) 1975-02-13

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee