GB1290535A - - Google Patents

Info

Publication number
GB1290535A
GB1290535A GB4798569A GB1290535DA GB1290535A GB 1290535 A GB1290535 A GB 1290535A GB 4798569 A GB4798569 A GB 4798569A GB 1290535D A GB1290535D A GB 1290535DA GB 1290535 A GB1290535 A GB 1290535A
Authority
GB
United Kingdom
Prior art keywords
blade
signal
speed
predetermined
comparison
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
GB4798569A
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 GB1290535A publication Critical patent/GB1290535A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/76—Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling scarifying devices
    • E02F3/80—Component parts
    • E02F3/84—Drives or control devices therefor, e.g. hydraulic drive systems
    • E02F3/844—Drives or control devices therefor, e.g. hydraulic drive systems for positioning the blade, e.g. hydraulically
    • E02F3/845—Drives or control devices therefor, e.g. hydraulic drive systems for positioning the blade, e.g. hydraulically using mechanical sensors to determine the blade position, e.g. inclinometers, gyroscopes, pendulums

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Operation Control Of Excavators (AREA)

Abstract

1290535 Bulldozers VSESOJUZNY NAUCHNO-ISSLEDOVATELSKY INSTITUT STROITELNOGO I DOROZHNOGO MASHINOSTROENIA 30 Sept 1969 47985/69 Heading E1F [Also in Division G3] A bulldozer has a blade 3 the. position of which relative to a horizontal plane is automatically sensed and compared with a predetermined position, and means are provided for moving the blade relative to the body of the machine in dependence upon the comparison so as to restore the blade to the predetermined position. A pendulum device 4 senses the position of the blade and is electrically connected via a comparison member 7 and a signal amplifier 8 to a switching unit 9 controlling a hydraulically operated servomotor 11 connected to the blade, the comparison member 7 being fed with a signal representative of the predetermined position from a device 6. The switching unit 9 is also controlled in an overriding manner by a signal from a sensor 16 responsive to the speed of the main shaft of the prime mover of the bulldozer, the signal being compared by a member 15 with a signal from a device 18 representative of a predetermined shaft speed whereby if the speed should fall below that predetermined the blade is raised until the latter speed is attained.
GB4798569A 1969-09-03 1969-09-30 Expired GB1290535A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1944713A DE1944713C3 (en) 1969-09-03 1969-09-03 bulldozer
GB4798569 1969-09-30

Publications (1)

Publication Number Publication Date
GB1290535A true GB1290535A (en) 1972-09-27

Family

ID=25757863

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4798569A Expired GB1290535A (en) 1969-09-03 1969-09-30

Country Status (2)

Country Link
DE (1) DE1944713C3 (en)
GB (1) GB1290535A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4166506A (en) 1975-06-30 1979-09-04 Kabushiki Kaisha Komatsu Seisakusho Controlling apparatus for bulldozer blade
US4282933A (en) * 1978-02-02 1981-08-11 Kabushiki Kaisha Komatsu Seisakusho Automatic control device for an earth working equipment
US4923015A (en) * 1988-10-03 1990-05-08 Barsby James B Earth mover blade stabilizing apparatus

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5330102A (en) * 1976-08-31 1978-03-22 Komatsu Mfg Co Ltd Device for automatically controlling blade of bulldozer
WO1991004378A1 (en) * 1989-09-14 1991-04-04 Kabushiki Kaisha Komatsu Seisakusho Blade controller of bulldozer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4166506A (en) 1975-06-30 1979-09-04 Kabushiki Kaisha Komatsu Seisakusho Controlling apparatus for bulldozer blade
US4282933A (en) * 1978-02-02 1981-08-11 Kabushiki Kaisha Komatsu Seisakusho Automatic control device for an earth working equipment
US4923015A (en) * 1988-10-03 1990-05-08 Barsby James B Earth mover blade stabilizing apparatus

Also Published As

Publication number Publication date
DE1944713A1 (en) 1971-03-04
DE1944713B2 (en) 1980-01-17
DE1944713C3 (en) 1980-09-11

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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