GB1133754A - Digging machines - Google Patents

Digging machines

Info

Publication number
GB1133754A
GB1133754A GB3967666A GB3967666A GB1133754A GB 1133754 A GB1133754 A GB 1133754A GB 3967666 A GB3967666 A GB 3967666A GB 3967666 A GB3967666 A GB 3967666A GB 1133754 A GB1133754 A GB 1133754A
Authority
GB
United Kingdom
Prior art keywords
boom
movement
solenoids
ram
digging
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
GB3967666A
Inventor
Kenneth Raymond Boydell
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.)
Dowty Technical Developments Ltd
Original Assignee
Dowty Technical Developments Ltd
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 Dowty Technical Developments Ltd filed Critical Dowty Technical Developments Ltd
Priority to GB3967666A priority Critical patent/GB1133754A/en
Publication of GB1133754A publication Critical patent/GB1133754A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • E02F9/08—Superstructures; Supports for superstructures
    • E02F9/10—Supports for movable superstructures mounted on travelling or walking gears or on other superstructures
    • E02F9/12—Slewing or traversing gears
    • E02F9/121—Turntables, i.e. structure rotatable about 360°
    • E02F9/123—Drives or control devices specially adapted therefor

Landscapes

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

Abstract

1,133,754. Shovelling machines. DOWTY TECHNICAL DEVELOPMENTS Ltd. 30 Oct., 1967 [6 Sept., 1966], No: 39676/66. Heading E1F. The speed of movement of a shovel-carrying boom swingably about a vertical axis, is as the boom approaches a digging, position, automatically reduced by control means appropriately associated with the means swing- ing the boom. Preferably electrically actuated solenoids control chokes in the supply and return pipe to a hydraulically actuated ram. The solenoids are connected to a rotary switch having a contactor drum mechanically coupled to for movement in unison with the boom when the boom is swung horizontally on operation of a manual control valve actuating the ram.
GB3967666A 1966-09-06 1966-09-06 Digging machines Expired GB1133754A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3967666A GB1133754A (en) 1966-09-06 1966-09-06 Digging machines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3967666A GB1133754A (en) 1966-09-06 1966-09-06 Digging machines

Publications (1)

Publication Number Publication Date
GB1133754A true GB1133754A (en) 1968-11-20

Family

ID=10410861

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3967666A Expired GB1133754A (en) 1966-09-06 1966-09-06 Digging machines

Country Status (1)

Country Link
GB (1) GB1133754A (en)

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