US3640069A - Oil-pressure-controlling device for big inertial load - Google Patents

Oil-pressure-controlling device for big inertial load Download PDF

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Publication number
US3640069A
US3640069A US850034A US3640069DA US3640069A US 3640069 A US3640069 A US 3640069A US 850034 A US850034 A US 850034A US 3640069D A US3640069D A US 3640069DA US 3640069 A US3640069 A US 3640069A
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US
United States
Prior art keywords
oil
pressure
valve
passage
hydraulic motor
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 - Lifetime
Application number
US850034A
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English (en)
Inventor
Takashi Sugahara
Minoru Suzuki
Tadayuki Fukunaga
Shozo Fukushima
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.)
Kawasaki Heavy Industries Ltd
Kawasaki Motors Ltd
Original Assignee
Kawasaki Heavy Industries 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 Kawasaki Heavy Industries Ltd filed Critical Kawasaki Heavy Industries Ltd
Application granted granted Critical
Publication of US3640069A publication Critical patent/US3640069A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass

Definitions

  • FIG. 3 is a sectional view of the device shown in FIGS. 1 and v 2 taken along the line B-B.
  • FIG. 4 is a sectional view of the device shown in FIG. 2 of the different operating situations.
  • the spool 4 is exerted by a force to push it to the right. But, since the pressure oil in the damping chamber 27' constructed with the right end projected portion of the spool 4 and the cover 13 is connected with the right spring chamber 53 only through a slight space 28 and the passage 25 is closed by a ball of the check valve, the movement of the spool 4 to the right is controlled by the choke effect of the pressured oil.
  • the variation of the pressure in the return circuit of the hydraulic motor therefore, is controlled at minimum and the motor is controlled to operate at a constant speedaccording to the oil quantity supplied and prevented from stalling.
  • the present invention is characterized by the following five features: There is provided a relief valve 3 which is operatively disposed with the oil return passage and the oil supply passage and has valve devices disposed on theopposite sides of the valve seat cylinder 39 and has a bypass 45 opening when the oil pressure is increased.
  • the abrupt and excessive increasing of the pressure in the oil pressure passage is prevented by two steps of setting the pressure for opening the valve by the bending of the springs 43,43 used for opening the valve device in the relief valve 3 and setting of the pressure for closing the valve by the movement of the spring seats 37,37 with the bent spring.
  • valve body including first and second independent bores formed therein

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Safety Valves (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Control Of Fluid Gearings (AREA)
US850034A 1968-08-14 1969-08-14 Oil-pressure-controlling device for big inertial load Expired - Lifetime US3640069A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP43058152A JPS504835B1 (enrdf_load_stackoverflow) 1968-08-14 1968-08-14

Publications (1)

Publication Number Publication Date
US3640069A true US3640069A (en) 1972-02-08

Family

ID=13076003

Family Applications (1)

Application Number Title Priority Date Filing Date
US850034A Expired - Lifetime US3640069A (en) 1968-08-14 1969-08-14 Oil-pressure-controlling device for big inertial load

Country Status (4)

Country Link
US (1) US3640069A (enrdf_load_stackoverflow)
JP (1) JPS504835B1 (enrdf_load_stackoverflow)
DE (1) DE1940672C3 (enrdf_load_stackoverflow)
GB (1) GB1284946A (enrdf_load_stackoverflow)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3944099A (en) * 1974-03-04 1976-03-16 Northwest Engineering Company Load holding device for mobile power crane excavators and the like
US4114737A (en) * 1975-12-18 1978-09-19 Teijin Seiki Company Limited Drive controlling mechanism
US4201279A (en) * 1975-12-18 1980-05-06 Teijin Seiki Company Limited Drive controlling mechanism
US4823550A (en) * 1987-06-23 1989-04-25 Templeton, Kenly & Co. Rotary valve with jet pump aspirator
US5496152A (en) * 1991-11-23 1996-03-05 Luk Farhzeug-Hydraulik Gmbh & Co. Kg Pump with internal valve between suction and pressure regions
US10982692B2 (en) * 2017-09-26 2021-04-20 Kawasaki Jukogyo Kabushiki Kaisha Swing-back preventing apparatus
CN114263646A (zh) * 2021-12-29 2022-04-01 潍柴动力股份有限公司 一种回转马达用防反转阀

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01293819A (ja) * 1988-05-20 1989-11-27 Toto Ltd 洗面化粧台
CN104879338B (zh) * 2015-05-21 2017-03-29 冯广建 一种液压油道借道伸缩装置
JP6886381B2 (ja) * 2017-09-29 2021-06-16 川崎重工業株式会社 液圧システム

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2651324A (en) * 1949-11-01 1953-09-08 New York Air Brake Co Multiple control valve
US3313316A (en) * 1964-06-01 1967-04-11 Clark Equipment Co Relief and anti-cavitation valve assembly

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2651324A (en) * 1949-11-01 1953-09-08 New York Air Brake Co Multiple control valve
US3313316A (en) * 1964-06-01 1967-04-11 Clark Equipment Co Relief and anti-cavitation valve assembly

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3944099A (en) * 1974-03-04 1976-03-16 Northwest Engineering Company Load holding device for mobile power crane excavators and the like
US4114737A (en) * 1975-12-18 1978-09-19 Teijin Seiki Company Limited Drive controlling mechanism
US4201279A (en) * 1975-12-18 1980-05-06 Teijin Seiki Company Limited Drive controlling mechanism
US4823550A (en) * 1987-06-23 1989-04-25 Templeton, Kenly & Co. Rotary valve with jet pump aspirator
US5496152A (en) * 1991-11-23 1996-03-05 Luk Farhzeug-Hydraulik Gmbh & Co. Kg Pump with internal valve between suction and pressure regions
US10982692B2 (en) * 2017-09-26 2021-04-20 Kawasaki Jukogyo Kabushiki Kaisha Swing-back preventing apparatus
CN114263646A (zh) * 2021-12-29 2022-04-01 潍柴动力股份有限公司 一种回转马达用防反转阀

Also Published As

Publication number Publication date
GB1284946A (en) 1972-08-09
DE1940672A1 (de) 1970-03-05
DE1940672B2 (enrdf_load_stackoverflow) 1973-10-11
JPS504835B1 (enrdf_load_stackoverflow) 1975-02-24
DE1940672C3 (de) 1974-05-16

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