FR2269613A1 - Trench digging vehicle with drive and work motors - has drive motor pump valve responsive to work motor pump pressure and bypass - Google Patents

Trench digging vehicle with drive and work motors - has drive motor pump valve responsive to work motor pump pressure and bypass

Info

Publication number
FR2269613A1
FR2269613A1 FR7509524A FR7509524A FR2269613A1 FR 2269613 A1 FR2269613 A1 FR 2269613A1 FR 7509524 A FR7509524 A FR 7509524A FR 7509524 A FR7509524 A FR 7509524A FR 2269613 A1 FR2269613 A1 FR 2269613A1
Authority
FR
France
Prior art keywords
motor pump
work
drive
feed
valve
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.)
Granted
Application number
FR7509524A
Other languages
French (fr)
Other versions
FR2269613B1 (en
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
Priority to FR7509524A priority Critical patent/FR2269613A1/en
Publication of FR2269613A1 publication Critical patent/FR2269613A1/en
Application granted granted Critical
Publication of FR2269613B1 publication Critical patent/FR2269613B1/fr
Granted legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/4008—Control of circuit pressure
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F5/00—Dredgers or soil-shifting machines for special purposes
    • E02F5/02—Dredgers or soil-shifting machines for special purposes for digging trenches or ditches
    • E02F5/14—Component parts for trench excavators, e.g. indicating devices travelling gear chassis, supports, skids
    • E02F5/145—Component parts for trench excavators, e.g. indicating devices travelling gear chassis, supports, skids control and indicating devices
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2221—Control of flow rate; Load sensing arrangements
    • E02F9/2239—Control of flow rate; Load sensing arrangements using two or more pumps with cross-assistance
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2278—Hydraulic circuits
    • E02F9/2292—Systems with two or more pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/44—Control of exclusively fluid gearing hydrostatic with more than one pump or motor in operation

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Motor Power Transmission Devices (AREA)

Abstract

A feed transfer mechanism for a trench excavating machine effects the automatic transfer of pressurized fluid from the machine's propulsive motor to the motor actuating working parts and utilizes separate pumps feeding respective motors with a valve in the drive motor feed and a bypass pipe with a non-return valve connecting the two feed pipes. The first valve is controlled by a calibrated spring acting to open the valve and controlled by the pressure prevailing in the working part pump feed, the non-return valve permitting flow in the direction of the working pump part feed.
FR7509524A 1975-03-26 1975-03-26 Trench digging vehicle with drive and work motors - has drive motor pump valve responsive to work motor pump pressure and bypass Granted FR2269613A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7509524A FR2269613A1 (en) 1975-03-26 1975-03-26 Trench digging vehicle with drive and work motors - has drive motor pump valve responsive to work motor pump pressure and bypass

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7509524A FR2269613A1 (en) 1975-03-26 1975-03-26 Trench digging vehicle with drive and work motors - has drive motor pump valve responsive to work motor pump pressure and bypass

Publications (2)

Publication Number Publication Date
FR2269613A1 true FR2269613A1 (en) 1975-11-28
FR2269613B1 FR2269613B1 (en) 1980-08-22

Family

ID=9153135

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7509524A Granted FR2269613A1 (en) 1975-03-26 1975-03-26 Trench digging vehicle with drive and work motors - has drive motor pump valve responsive to work motor pump pressure and bypass

Country Status (1)

Country Link
FR (1) FR2269613A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0030971A4 (en) * 1979-06-25 1981-05-15 Standard Oil Co Apparatus for drilling into the sidewall of a drill hole.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0030971A4 (en) * 1979-06-25 1981-05-15 Standard Oil Co Apparatus for drilling into the sidewall of a drill hole.
EP0030971A1 (en) * 1979-06-25 1981-07-01 Standard Oil Co Apparatus for drilling into the sidewall of a drill hole.

Also Published As

Publication number Publication date
FR2269613B1 (en) 1980-08-22

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Legal Events

Date Code Title Description
ST Notification of lapse