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GB1279460A - Telescopic piston and cylinder assembly - Google Patents

Telescopic piston and cylinder assembly

Info

Publication number
GB1279460A
GB1279460A GB62692/69A GB6269269A GB1279460A GB 1279460 A GB1279460 A GB 1279460A GB 62692/69 A GB62692/69 A GB 62692/69A GB 6269269 A GB6269269 A GB 6269269A GB 1279460 A GB1279460 A GB 1279460A
Authority
GB
United Kingdom
Prior art keywords
pistons
back pressure
extension
fluid
dec
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
GB62692/69A
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.)
PESCI SpA CARLO
Original Assignee
PESCI SpA CARLO
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 PESCI SpA CARLO filed Critical PESCI SpA CARLO
Publication of GB1279460A publication Critical patent/GB1279460A/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
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force 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
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/2053—Type of pump
    • F15B2211/20538—Type of pump constant capacity
    • 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
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30525—Directional control valves, e.g. 4/3-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
    • F15B2211/405—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
    • F15B2211/41—Flow control characterised by the positions of the valve element
    • F15B2211/411—Flow control characterised by the positions of the valve element the positions being discrete
    • 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
    • F15B2211/41581—Flow control characterised by the connections of the flow control means in the circuit being connected to an output member and a return line
    • 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
    • F15B2211/705—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
    • F15B2211/7057—Linear output members being of the telescopic type

Landscapes

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

Abstract

1279460 Telescopic rams CARLO PESCI SPA 23 Dec 1969 [28 Dec 1968] 62692/69 Heading F1P A double or single-acting telescope ram is extended or retracted by supplying fluid-pressure to one side of pistons 5, 9, 12 while maintaining a fluid back pressure on the other side of the pistons, whereby the associated cylinders 3, 6 and rod 10 are displaced in a predetermined order depending on the effective piston areas. In the double-acting embodiment described the areas are such that the largest piston 5 extends first followed by pistons 9 and 12. Extension occurs when fluid is supplied to a port 301 in an outer cylinder 1, the extension being resisted by the back pressure developed in communicating annular chambers A, A1, A2. These chambers A, A1, A2 communicate through parts 403, 503, 206, 306 and annular passages 303, 106 in the cylinders 3, 6. The back pressure developed during the extension stroke is determined by an adjustable exhaust valve 14 and during the refraction stroke by an adjustable valve 16. A circuit (not shown) for controlling the ram is described.
GB62692/69A 1968-12-28 1969-12-23 Telescopic piston and cylinder assembly Expired GB1279460A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT755868 1968-12-28

Publications (1)

Publication Number Publication Date
GB1279460A true GB1279460A (en) 1972-06-28

Family

ID=11125166

Family Applications (1)

Application Number Title Priority Date Filing Date
GB62692/69A Expired GB1279460A (en) 1968-12-28 1969-12-23 Telescopic piston and cylinder assembly

Country Status (9)

Country Link
US (1) US3691904A (en)
BE (1) BE743745A (en)
CH (1) CH501156A (en)
DE (1) DE1963388C3 (en)
ES (1) ES374955A1 (en)
FR (1) FR2027262A1 (en)
GB (1) GB1279460A (en)
NL (1) NL161850C (en)
SE (1) SE354691B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2176845A (en) * 1985-06-21 1987-01-07 600 Group Plc The Hydraulically operated telescopic device

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2128247B1 (en) * 1971-03-09 1974-10-11 Bennes Marrel
US3944099A (en) * 1974-03-04 1976-03-16 Northwest Engineering Company Load holding device for mobile power crane excavators and the like
US3976099A (en) * 1974-09-30 1976-08-24 Western Gear Corporation Multiple-passage, quick-disconnect coupling
ZA804072B (en) * 1979-08-07 1981-06-24 Dobson Park Ind Telescoping jack
US4759257A (en) * 1987-01-27 1988-07-26 Dempster Systems Inc. Power unit particularly for refuse container packer mechanism
EP1635092B1 (en) * 2004-09-08 2011-07-20 Getrag Ford Transmissions GmbH Hydraulic control device for a shifting fork in a transmission
US20070101861A1 (en) * 2005-10-20 2007-05-10 Danny Turner Two-speed cylinder
US20140291085A1 (en) * 2013-03-30 2014-10-02 Ronald Scott Bandy Segmented Air Shock
US10214071B1 (en) 2016-05-28 2019-02-26 PAL Suspension LLC Vehicle suspension system with multi-stage hydraulic cylinder assemblies and external spring packs
US10737545B1 (en) 2019-12-19 2020-08-11 PAL Suspension LLC Vehicle suspension system with multi-stage hydraulic cylinder assemblies and external spring packs

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1193752A (en) * 1959-11-04
FR982487A (en) * 1943-06-30 1951-06-11 Hydromechanical control particularly applicable to fabric ironing machines, ready-made or not
US2933070A (en) * 1958-08-12 1960-04-19 Rheinstahl Siegener Eisenbahnb Double-acting hydraulic jack
US3085828A (en) * 1959-05-04 1963-04-16 Gar Wood Ind Inc Telescopic hoist assembly for tilting bodies of dumping vehicles
US3170377A (en) * 1959-06-10 1965-02-23 Dempster Brothers Inc Compaction apparatus
NL289112A (en) * 1962-07-05

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2176845A (en) * 1985-06-21 1987-01-07 600 Group Plc The Hydraulically operated telescopic device
GB2176845B (en) * 1985-06-21 1989-04-26 600 Group Plc The Improvements in telescopic devices such as crane jibs

Also Published As

Publication number Publication date
US3691904A (en) 1972-09-19
SE354691B (en) 1973-03-19
DE1963388C3 (en) 1974-05-02
NL6919476A (en) 1970-06-30
NL161850B (en) 1979-10-15
DE1963388A1 (en) 1970-07-23
NL161850C (en) 1980-03-17
ES374955A1 (en) 1972-02-01
FR2027262A1 (en) 1970-09-25
DE1963388B2 (en) 1973-10-04
CH501156A (en) 1970-12-31
BE743745A (en) 1970-05-28

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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