GB1205710A - Quick drop valve for bulldozer blade hydraulic controls - Google Patents

Quick drop valve for bulldozer blade hydraulic controls

Info

Publication number
GB1205710A
GB1205710A GB3214868A GB3214868A GB1205710A GB 1205710 A GB1205710 A GB 1205710A GB 3214868 A GB3214868 A GB 3214868A GB 3214868 A GB3214868 A GB 3214868A GB 1205710 A GB1205710 A GB 1205710A
Authority
GB
United Kingdom
Prior art keywords
jack
passage
valve
valve member
rod end
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
GB3214868A
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.)
Caterpillar Inc
Original Assignee
Caterpillar Tractor Co
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 Caterpillar Tractor Co filed Critical Caterpillar Tractor Co
Publication of GB1205710A publication Critical patent/GB1205710A/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
    • 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
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/021—Valves for interconnecting the fluid chambers of an actuator
    • 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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/36—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor
    • F16K31/363—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor the fluid acting on a piston
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/2496—Self-proportioning or correlating systems
    • Y10T137/2514—Self-proportioning flow systems
    • Y10T137/2521—Flow comparison or differential response
    • Y10T137/2524—Flow dividers [e.g., reversely acting controls]

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Operation Control Of Excavators (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

1,205,710. Bulldozers. CATERPILLAR TRACTOR CO. 5 July, 1968 [1 Aug., 1967], No 32148/68. Heading E1F. [Also in Division F2] A quick-drop valve for use with a doubleacting hydraulic jack controlling the elevation of a bulldozer blade comprises a spring-loaded valve member 31 which, when the blade is dropped by gravity, respond to the pressure differential across the restriction 29 in the valve passage 28 between the rod end of the jack and exhaust to partially connect the rod end to the opposite end of the jack by way of passage 39, the ports 41 in the valve member being in communication with both the passage 28 and the passage 39. When flow into the valve reaches a predetermined value corresponding to the jack approaching its end position sleeve 43 moves to abut an internal shoulder in the valve member ,to partially obstruct the ports 41 and pass a substantial part of the fluid from the rod end of the jack to the opposite end thereof.
GB3214868A 1967-08-01 1968-07-05 Quick drop valve for bulldozer blade hydraulic controls Expired GB1205710A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US65766967A 1967-08-01 1967-08-01

Publications (1)

Publication Number Publication Date
GB1205710A true GB1205710A (en) 1970-09-16

Family

ID=24638156

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3214868A Expired GB1205710A (en) 1967-08-01 1968-07-05 Quick drop valve for bulldozer blade hydraulic controls

Country Status (4)

Country Link
US (1) US3448685A (en)
JP (1) JPS4928313B1 (en)
FR (1) FR1576772A (en)
GB (1) GB1205710A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2119903A (en) * 1982-05-08 1983-11-23 Dereve Fluid flow control valve
CN113738618A (en) * 2021-08-20 2021-12-03 西安交通大学 Oil pressure accompanying control system and method for diaphragm compressor

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3568707A (en) * 1968-12-16 1971-03-09 Int Harvester Co Quick drop valve
US4240457A (en) * 1978-03-15 1980-12-23 Caterpillar Tractor Co. Variable flow control valve for steering systems of articulated vehicles
JPS5563003A (en) * 1978-11-01 1980-05-12 Caterpillar Tractor Co Hydraulic control circuit with quick drop valve
US4417502A (en) * 1980-11-17 1983-11-29 Dresser Industries, Inc. Load supporting hydraulic circuit with emergency automatic load restraint
WO1982001749A1 (en) * 1980-11-17 1982-05-27 Shore Daniel B Load supporting hydraulic circuit with emergency automatic load restraint
US4397221A (en) * 1981-06-01 1983-08-09 Deere & Company Regenerative valve
US5014734A (en) * 1990-08-31 1991-05-14 Caterpillar Inc. Quick drop valve
US5251705A (en) * 1992-03-19 1993-10-12 Deere & Company Electrical trigger for quick drop valve
US10047502B2 (en) 2015-12-10 2018-08-14 Caterpillar Inc. System and method for controlling a work implement of a machine
CN112696512B (en) * 2020-12-21 2021-12-14 西安交通大学 Adjustable oil spill valve and diaphragm hydrogen compressor for hydrogenation station

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2367682A (en) * 1943-04-09 1945-01-23 Adel Prec Products Corp Landing gear by-pass valve
US2646025A (en) * 1951-02-07 1953-07-21 Bendix Aviat Corp By-pass valve for hydraulic motors
US3006372A (en) * 1959-04-22 1961-10-31 New York Air Brake Co Control valve with cavitation-minimizing replenishing circuit
US3241461A (en) * 1963-09-03 1966-03-22 Allis Chalmers Mfg Co Hydraulic control system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2119903A (en) * 1982-05-08 1983-11-23 Dereve Fluid flow control valve
CN113738618A (en) * 2021-08-20 2021-12-03 西安交通大学 Oil pressure accompanying control system and method for diaphragm compressor

Also Published As

Publication number Publication date
FR1576772A (en) 1969-08-01
JPS4928313B1 (en) 1974-07-25
US3448685A (en) 1969-06-10

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees