ES358380A1 - Device for detecting the end of travel of jack pistons - Google Patents

Device for detecting the end of travel of jack pistons

Info

Publication number
ES358380A1
ES358380A1 ES358380A ES358380A ES358380A1 ES 358380 A1 ES358380 A1 ES 358380A1 ES 358380 A ES358380 A ES 358380A ES 358380 A ES358380 A ES 358380A ES 358380 A1 ES358380 A1 ES 358380A1
Authority
ES
Spain
Prior art keywords
lamp
travel
distributor
piston
lines
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
ES358380A
Other languages
Spanish (es)
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.)
Poclain SA
Original Assignee
Poclain 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 Poclain SA filed Critical Poclain SA
Publication of ES358380A1 publication Critical patent/ES358380A1/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
    • 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
    • F15B15/28—Means for indicating the position, e.g. end of stroke
    • F15B15/2807—Position switches, i.e. means for sensing of discrete positions only, e.g. limit switches

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)
  • Earth Drilling (AREA)

Abstract

An hydraulic or pneumatic ram 1 operating the bucket of an earthworking machine has a piston 7 provided with valves 8 arranged to inter-connect the chambers on opposite sides-, of the piston 7 when at its end of travel position, the resulting pressure drop in the supply line 2 being used to operate a pressure switch 14 and light a lamp 13. To prevent lighting of the lamp 13 when the pressure in the lines 2 is low due to distributor 9 being in the neutral position shown, the electrical circuit to the lamp is broken by contacts 11 a, 11 b operated by an abutment 10 coupled to the distributor 9. A valve 15 ensures that the pressure switch 14 is exposed to the higher of the pressures in the lines 2.
ES358380A 1967-09-21 1968-09-21 Device for detecting the end of travel of jack pistons Expired ES358380A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR121772A FR1544188A (en) 1967-09-21 1967-09-21 Cylinder piston limit switch detection device

Publications (1)

Publication Number Publication Date
ES358380A1 true ES358380A1 (en) 1970-04-16

Family

ID=8638719

Family Applications (1)

Application Number Title Priority Date Filing Date
ES358380A Expired ES358380A1 (en) 1967-09-21 1968-09-21 Device for detecting the end of travel of jack pistons

Country Status (4)

Country Link
US (1) US3541925A (en)
ES (1) ES358380A1 (en)
FR (1) FR1544188A (en)
GB (1) GB1222840A (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3691902A (en) * 1971-07-13 1972-09-19 Us Army Monitoring system for pneumatic cylinder
US4002103A (en) * 1974-07-01 1977-01-11 The West Company Reciprocating apparatus with a controllable dwell time at each end of the stroke
DE3201013C2 (en) * 1982-01-15 1984-11-29 Maschinenfabrik Hilma Gmbh, 5912 Hilchenbach Hydraulically operated swing clamp
DE3417447A1 (en) * 1984-05-11 1985-11-21 E.P.E. Budde GmbH, 5980 Werdohl Device for detecting the end positions of a hydraulic cylinder
JPS60263713A (en) * 1984-06-11 1985-12-27 Takashi Kimura Intermediate stop air pressure cylinder with reduction gear
DE9411939U1 (en) * 1994-07-22 1994-09-15 Pleiger Maschf Paul Position indicator for hydraulically operated fittings
US5587536A (en) * 1995-08-17 1996-12-24 Rasmussen; John Differential pressure sensing device for pneumatic cylinders
AUPN687795A0 (en) * 1995-11-29 1995-12-21 Parker Hannifin (Australia) Pty Limited Pneumatic or hydraulic cylinders
DE19938132A1 (en) * 1999-08-16 2001-02-22 Eckehart Schulze Electro-hydraulic monitoring device for a double-acting hydraulic cylinder
JP4342747B2 (en) * 2000-10-06 2009-10-14 株式会社安藤製作所 Cylinder control sensor and cylinder device provided with the same

Also Published As

Publication number Publication date
GB1222840A (en) 1971-02-17
US3541925A (en) 1970-11-24
FR1544188A (en) 1968-10-31

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