US3737830A - One handle control for loaders - Google Patents

One handle control for loaders Download PDF

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Publication number
US3737830A
US3737830A US00222495A US3737830DA US3737830A US 3737830 A US3737830 A US 3737830A US 00222495 A US00222495 A US 00222495A US 3737830D A US3737830D A US 3737830DA US 3737830 A US3737830 A US 3737830A
Authority
US
United States
Prior art keywords
shaft
potentiometer
control assembly
lever
contacting
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
US00222495A
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English (en)
Inventor
W Lark
M Jennings
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.)
Komatsu America International Co
Original Assignee
International Harverster Corp
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 International Harverster Corp filed Critical International Harverster Corp
Application granted granted Critical
Publication of US3737830A publication Critical patent/US3737830A/en
Assigned to DRESSER INDUSTRIES, INC., A CORP. OF DEL. reassignment DRESSER INDUSTRIES, INC., A CORP. OF DEL. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: INTERNATIONAL HARVESTER COMPANY
Assigned to DRESSER FINANCE CORPORATION, DALLAS, TX., A DE CORP. reassignment DRESSER FINANCE CORPORATION, DALLAS, TX., A DE CORP. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: DRESSER INDUSTRIES, INC.
Assigned to KOMATSU DRESSER COMPANY, E. SUNNYSIDE 7TH ST., LIBERTYVILLE, IL., A GENERAL PARTNERSHIP UNDER THE UNIFORM PARTNERSHIP ACT OF THE STATE OF DE reassignment KOMATSU DRESSER COMPANY, E. SUNNYSIDE 7TH ST., LIBERTYVILLE, IL., A GENERAL PARTNERSHIP UNDER THE UNIFORM PARTNERSHIP ACT OF THE STATE OF DE ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: DRESSER FINANCE CORPORATION, A CORP. OF DE.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G9/00—Manually-actuated control mechanisms provided with one single controlling member co-operating with two or more controlled members, e.g. selectively, simultaneously
    • G05G9/02—Manually-actuated control mechanisms provided with one single controlling member co-operating with two or more controlled members, e.g. selectively, simultaneously the controlling member being movable in different independent ways, movement in each individual way actuating one controlled member only
    • G05G9/04—Manually-actuated control mechanisms provided with one single controlling member co-operating with two or more controlled members, e.g. selectively, simultaneously the controlling member being movable in different independent ways, movement in each individual way actuating one controlled member only in which movement in two or more ways can occur simultaneously
    • G05G9/047—Manually-actuated control mechanisms provided with one single controlling member co-operating with two or more controlled members, e.g. selectively, simultaneously the controlling member being movable in different independent ways, movement in each individual way actuating one controlled member only in which movement in two or more ways can occur simultaneously the controlling member being movable by hand about orthogonal axes, e.g. joysticks
    • G05G9/04785—Manually-actuated control mechanisms provided with one single controlling member co-operating with two or more controlled members, e.g. selectively, simultaneously the controlling member being movable in different independent ways, movement in each individual way actuating one controlled member only in which movement in two or more ways can occur simultaneously the controlling member being movable by hand about orthogonal axes, e.g. joysticks the controlling member being the operating part of a switch arrangement
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G9/00—Manually-actuated control mechanisms provided with one single controlling member co-operating with two or more controlled members, e.g. selectively, simultaneously
    • G05G9/02—Manually-actuated control mechanisms provided with one single controlling member co-operating with two or more controlled members, e.g. selectively, simultaneously the controlling member being movable in different independent ways, movement in each individual way actuating one controlled member only
    • G05G9/04—Manually-actuated control mechanisms provided with one single controlling member co-operating with two or more controlled members, e.g. selectively, simultaneously the controlling member being movable in different independent ways, movement in each individual way actuating one controlled member only in which movement in two or more ways can occur simultaneously
    • G05G9/047—Manually-actuated control mechanisms provided with one single controlling member co-operating with two or more controlled members, e.g. selectively, simultaneously the controlling member being movable in different independent ways, movement in each individual way actuating one controlled member only in which movement in two or more ways can occur simultaneously the controlling member being movable by hand about orthogonal axes, e.g. joysticks
    • G05G2009/04703—Mounting of controlling member
    • G05G2009/04733—Mounting of controlling member with a joint having a nutating disc, e.g. forced by a spring
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G9/00—Manually-actuated control mechanisms provided with one single controlling member co-operating with two or more controlled members, e.g. selectively, simultaneously
    • G05G9/02—Manually-actuated control mechanisms provided with one single controlling member co-operating with two or more controlled members, e.g. selectively, simultaneously the controlling member being movable in different independent ways, movement in each individual way actuating one controlled member only
    • G05G9/04—Manually-actuated control mechanisms provided with one single controlling member co-operating with two or more controlled members, e.g. selectively, simultaneously the controlling member being movable in different independent ways, movement in each individual way actuating one controlled member only in which movement in two or more ways can occur simultaneously
    • G05G9/047—Manually-actuated control mechanisms provided with one single controlling member co-operating with two or more controlled members, e.g. selectively, simultaneously the controlling member being movable in different independent ways, movement in each individual way actuating one controlled member only in which movement in two or more ways can occur simultaneously the controlling member being movable by hand about orthogonal axes, e.g. joysticks
    • G05G2009/0474—Manually-actuated control mechanisms provided with one single controlling member co-operating with two or more controlled members, e.g. selectively, simultaneously the controlling member being movable in different independent ways, movement in each individual way actuating one controlled member only in which movement in two or more ways can occur simultaneously the controlling member being movable by hand about orthogonal axes, e.g. joysticks characterised by means converting mechanical movement into electric signals
    • G05G2009/04744—Switches
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G9/00—Manually-actuated control mechanisms provided with one single controlling member co-operating with two or more controlled members, e.g. selectively, simultaneously
    • G05G9/02—Manually-actuated control mechanisms provided with one single controlling member co-operating with two or more controlled members, e.g. selectively, simultaneously the controlling member being movable in different independent ways, movement in each individual way actuating one controlled member only
    • G05G9/04—Manually-actuated control mechanisms provided with one single controlling member co-operating with two or more controlled members, e.g. selectively, simultaneously the controlling member being movable in different independent ways, movement in each individual way actuating one controlled member only in which movement in two or more ways can occur simultaneously
    • G05G9/047—Manually-actuated control mechanisms provided with one single controlling member co-operating with two or more controlled members, e.g. selectively, simultaneously the controlling member being movable in different independent ways, movement in each individual way actuating one controlled member only in which movement in two or more ways can occur simultaneously the controlling member being movable by hand about orthogonal axes, e.g. joysticks
    • G05G2009/0474—Manually-actuated control mechanisms provided with one single controlling member co-operating with two or more controlled members, e.g. selectively, simultaneously the controlling member being movable in different independent ways, movement in each individual way actuating one controlled member only in which movement in two or more ways can occur simultaneously the controlling member being movable by hand about orthogonal axes, e.g. joysticks characterised by means converting mechanical movement into electric signals
    • G05G2009/04748—Position sensor for rotary movement, e.g. potentiometer
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H15/00—Switches having rectilinearly-movable operating part or parts adapted for actuation in opposite directions, e.g. slide switch
    • H01H15/02—Details
    • H01H15/06—Movable parts; Contacts mounted thereon
    • H01H15/10—Operating parts
    • H01H15/102—Operating parts comprising cam devices
    • H01H15/107—Operating parts comprising cam devices actuating conventional selfcontained microswitches

Definitions

  • This invention relates to an electronic incorporating control mechanism which activates a number of different mechanical functions, and more particularly, to a single lever that can actuate implement movement in several planes.
  • levers of this type are provided which, by the movement in several planes; results in the performance of a number of implement operations.
  • lever jamming can result if the lever is displaced in a manner such that several control gears are engaged simultaneously.
  • the present invention relates to a control mechanism whereby a plurality of implement movement may be activated simultaneously without jamming.
  • the mechanism further employs a simple electronic activation system which avoids the problems and expense inherent in a gear activation system.
  • Still another is to provide a control system that may simultaneously activate several operations without jamming.
  • Yet another object is to provide a lever which is easily repaired, of a simple design and inexpensively manufactured.
  • a further object is to provide an electronic hydraulic control system which eliminates the mechanical linkages and levers associated with hydraulic systems.
  • Another object is to provide a control system having the capacity of being lockable in a predetermined posi tion causing the associated implement to also lock-in.
  • FIG. 1 is an axial vertical section of the invention as attached to the vehicle;
  • FIG. 2 is a top elevational view of FIG. 1'
  • FIG. 3 is a front view of the lever illustrated in FIG.
  • FIG. 4 is a section on lines 4-4 of FIG. 1 showing a cross section of a potentiometer through the supporting shaft;
  • FIG. 5 is a section along the section line 5-5 of FIG. 1 showing a cross section of the collar adjacent its juncture of the open end cylindrical member;
  • FIG. 6 is a section on lines 6-6 of FIG. 1 showing a cross section through the supporting shaft.
  • This invention incorporates a control circuit for front end loaders as disclosed in pending application Ser. No. 112,537 filed Feb. 4, 1921.
  • a series of potentiometers two or more being located in a given circuit, are employed to accomplish the desired result.
  • the operator is able to automatically move and position the front end loader.
  • master potentiometer is set by the operator and then brought into the total circuitry by the closing of a tap switch thereafter.
  • the slave potentiometer is moved to match the master potentiometer setting.
  • a series of several circuits each having a master as well as slave potentiometer are provided to automatically move the implement through a digging cycle of positions.
  • this invention is directed. That is, a simple, inexpensive means whereby the operator can automatically and simultaneously cut out the above mentioned automatic circuitry, and activate and control a second set of master potentiometers manually.
  • the second set of potentiometers control the same boom and bucket positions as did the automatic potentiometers, all of the circuitry being the same with the exception of the substitution of master and slave potentiometer systems.
  • the one handle control or multiple control unit means is designated by the numeral 10.
  • the control unit comprises a rectangular collar means 12, having a base means 14, and a hollow cylindrical cam means 16 having a bottom cover means 17.
  • the base 14 is fastened to the frame portion means 18 of a vehicle (not shown) by bolts, a weld or other suitable means.
  • the open end cylindrical member 16 carries a lever shaft means 20 for actuation and control of the implement.
  • the lever shaft 20 is centrally located in member 16, having an upper section means 22 extending thereabove and a lower section means 24 extending downwardly thereinto.
  • an operating head means 26 Positioned on the top section 22 of the shaft 20 is an operating head means 26, of sufficient size and design such that the operator can maintain a grip thereupon.
  • Mounted on the shaft 20 below the handle 26 is a sheet metal disk means 28, such that it supports the operatorshand and prevents collapse of the rubber boot means 30.
  • the boot means 30 is apertured through its center to permit passage of the shaft 20 and adapted and sized to form a seal with the top 32 of the cylinder 16 preventing exposure to moisture, dirt, etc.
  • the inner rectangular shaped surface means 40 (shown'in FIGS. 1 and 2) of the ring 36 comprises an angled or tapered portion means 42, a flat shoulder portion means 44, a beveled edge means 46 located on the front side 48 of the rectangular surface 40 and a corresponding vertical portion 50 located on the other three sides of the rectangular surface 40.
  • the inner rectangular surface 40 in the preferred embodiment defines a generally square aperture 54.
  • the lever shaft 20 passes through the center of the aperture 54 and through correspondingly apertured plates 56 and 58. Plate 56 is secured to the bottom 60 of cylindrical member 36 by a suitable means, plate 58 being in turn secured to plate 56.
  • a ball means 76 or part thereof.
  • This arrangement is known as a deadmans means which compels the operator to constantly exert pressure on the operating head 26 to hold the lever shaft 20 in an engaged position.
  • the ball member 76 is positioned within a member, such as a socket means 82, which-has an inner face 84 such that the face 86 of the ball 76 slidingly engages therewith. It is to be understood that the ball and socket is the preferred embodiment, however, any force transferring means acting between said shaft and lever shaft transferring'movement therebetween would be satisfactory.
  • a flange member means 90 Extending upwardly and away from the outer surface 88 of socket member 82 is a flange member means 90.
  • the lower extreme 92 of flange member 90 is fixedly secured to the outer surface 88 of socket member, the
  • lever shaft 20 and contacting shaft means 98 are such that as the lever is moved into phantom position A the contacting shaft is pulled from a neutral position out of cylindrical member 16. In phantom position B the shaft is pushed into cylindrical member 16, while in positions C or D shaft 98 is simplypivoted around its major axis either to the left or to the right.
  • the contacting shaft 98 is slidingly and pivotally mounted, eccentrically, in a cylindrical collar or bushing means 100, which serves as a guide for horizontal and pivotal movement.
  • the collar 100 has a front extreme means 102 and a rear extreme means 104.
  • the front extreme 102 extends into a compression bracket means 106, which is welded to a bracket means 108.
  • the configuration of bracket 106 (as shown in FIGS. 2 and is such that it outlines generally a key hole, the bracket 108 has a correspondingly shaped aperture for junction therewith.
  • bracket 108 is welded to a curved plate means 110 which, in turn, is secured-to cylindrical member 16, a sealing gasket being interposed therebetween.
  • the keyhole defining bracket 106 is welded to bracket 108 only on edge 112, such that edge 114 is flexible about point 116.
  • the bracket 106 is apertured at 118 and 120 to suitably receive the shank 122 of a bolt-124 which is designed for threaded engagement with a nut 126.
  • the front extreme 102 of collar 100 having shaft 98 carried eccentrically therein, is placed within the bracket 106 and secured therein by the engagement of bolt 124 and nut 126.
  • shaft 98 journals collar 100 eccentrically the lower wall means 128 thereof thus, being thicker than the upper wall means 130.
  • the lower wall 128 has aperture means 132 and 134, which,
  • the wall can rotatably accommodate and carry ball means 136 and 138.
  • the upper part 140 of ball 136 is rotatably accommodated in a horizontal or channel groove means 142 out in shaft 98.
  • the upper part 144 of ball 138 is similarly positioned in circumferential groove or port means 146 which extends around the shaft 98.
  • bracket 150 welded to surface 148 of collar 100 is an elongated bracket 150 that extends down and under collar 100.
  • snap switch means 152 and 154 are mounted on the bracket 150 such that the switch activation devices and 162 contact the lower parts 164 and 166 of balls 136 and The snap switch means 152 and 154 control the cutting in or out of the circuits which control the automatic implement control means, as disclosed in application Ser. No. 112,537.
  • a manual bucket potentiometer 172 is provided at the end 174 of the contacting shaft 98, and a manual boom potentiometer 178 is provided at the end extreme 176 of elongated bracket 150.
  • the bucket potentiometer 172 has its major axis parallel to said shaft 98, and said boom potentiometer 178 has its major axis perpendicular to said shaft 98.
  • Bucket potentiometer 172 is threadingly mounted in a bore 180, such that the potentiometer adjustment shaft 182, journals the bore and is fixedly mounted therein and follows any movement thereof.
  • potentiometer 172 is linked to potentiometer 178 by a wire means or angle wire means 184.
  • the first leg 186 of wire 184 is pivotally secured in channel 190 of bracket 192, the second longer leg 188 being fixed in potentiometer adjustment stem collar 194.
  • the bracket 192 is journaled by the thread carrying section 196 of the housing 198 of potentiometer 172 and held in fixed relationship therewith by bolt 200.
  • the longer leg 188 is slidingly fixed in potentiometer collar 198 which, in turn, is journaled by the adjustment shaft 202 of potentiometer 178, the frame 204 thereof being fixed to bracket 150.
  • potentiometer adjustment shaft 182 of potentiometer 17 2 moves correspondingly, creating an impulse which activates the bucket circuitry, the housing of potentiometer 172 being held in a fixed position against rotation by wire 184.
  • the rotational movement caused ball 136 to move down, cutting out the automatic bucket circuitryv thereby giving the operator full manual control of the bucket.
  • leg 186 When shaft 98 is urged into cylindrical member 16 or out thereof, leg 186 follows therewith, causing leg 188 to pivot potentiometeradjusting shaft 2020f potentiometer 178, which activates the boom circuitry.
  • pivot finger 74 when urged forward against inner surface 40 serves as a pivot point for shaft 20.
  • a downward urging force supplied by compression spring 78 the operator can push downon head 26 as he pivots on finger 74 to cause the edge 68 of plate 64 to slide down the beveled edge 46 into a locking'position.
  • this locking position actuates the implement to assume a floatposition.
  • the operator can lock the lever shaft causing the boom to assume a floating position, supported by the ground surface, and thereupon use both hands to re-position the vehicle, etc. It is apparent that any implementposition can be arranged to so lock-in simply by rearranging the circuitry.
  • a mounting panel means 206 (as shown in FIG. 6) is provided.
  • Panel means 206 serves as a convenient central mount for master potentiometer means 208, 210, 212 and 214 employed in the automatic circuitry as disclosed in application Ser. No. 112,537.
  • the assembly includes; a supporting means carrying a lever shaft means in pivotal relationship thereto; a collar means fixed to the supporting :means including a bushing journaled by a shaft, a means for actuating and de-actuating automatic electronic circuitry, a means for varying the impedance of first and second potentiometers simultaneously with the tie-actuation of the associated automatic electronic circuitry; and a lever means acting between the lever shaft means and the shaft means translating movement therebetween.
  • said contacting shaft having a horizontal groove means and a circumferential groove means
  • a first and second ball means each positioned part in one of said apertures, part in one of said grooves and contacting said micro switch means.
  • first and second leg means said first leg being pivotally secured to said first potentiometer, said second leg being slidingly secured to said second potentiometer adjustment stem means.
  • a square pivot plate means pivoting on said flat shoulder portion; and 4 a'pivot finger means pivoting on said tapered portion locking said lever shaft in'a fixed position.
  • a multiple control assembly employing:
  • a hollow cam means including a ring, a universally movable lever shaft means having a first end extending out of said cam means and a second end journaling said'ring, said second end having a ball and socket means; collar means fixed to said cam means including; a bushing having apertures and being eccentrically journaled by a shaft means, said shaft having a first and second end means, a-lever link means fixing said first end to said socket such that movement of said lever shaft means is transferred to said shaft means, said shaft means having horizontally extending and circumferentially extending groove means, said grooves being located adjacent said apertures in said bushing, each carrying a rotatable ball means, said ball means extending in part into said grooves and in part out of said apertures contacting an electronic circuitry actuation means, first and second potentiometer means lying vertically apart and having their adjustment shaft means perpendicular to each other, said first potentiometer adjustment shaft means fixedly journaling said second end of said shaft; and
  • a bracket means pivotally and slidingly securing said shaft means includes:
  • second potentiometer adjustment shaft means to a square pivot plate means, pivoting on said ;flat 531d Shaft meansshoulder portion means;
  • said ring comprises; an outer circumference in contact with said cam means, an inner rectangular surface comprising; a tapered portion means, a flat shoulder portion means, and a beveled edge portion means. means downwafd- 11.
  • said lever a pivot finger means pivoting against said tapered portion means; and a compression spring means urging said lever shaft

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Operation Control Of Excavators (AREA)
  • Mechanical Control Devices (AREA)
US00222495A 1972-02-01 1972-02-01 One handle control for loaders Expired - Lifetime US3737830A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US22249572A 1972-02-01 1972-02-01

Publications (1)

Publication Number Publication Date
US3737830A true US3737830A (en) 1973-06-05

Family

ID=22832453

Family Applications (1)

Application Number Title Priority Date Filing Date
US00222495A Expired - Lifetime US3737830A (en) 1972-02-01 1972-02-01 One handle control for loaders

Country Status (6)

Country Link
US (1) US3737830A (de)
JP (1) JPS4884402A (de)
AU (1) AU459878B2 (de)
CA (1) CA962351A (de)
DE (2) DE2304259B2 (de)
GB (1) GB1423222A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4420273A (en) * 1980-11-05 1983-12-13 Firma Novotechnik Kg Offterdinger Gmbh & Co. Coupling device for the play-free connection of a precision potentiometer with a movable machine part
US4528544A (en) * 1983-09-12 1985-07-09 Allied Corporation Control apparatus for variable speed reversible motor
CN114753433A (zh) * 2022-05-30 2022-07-15 江苏朗禾控制系统有限公司 一种新型挖掘机单手柄控制系统及其控制方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4046484A (en) * 1976-11-15 1977-09-06 Orville H. Holz, Jr. Spaced-rotor ride-type surface working machine with single-stick control of all movements

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US719991A (en) * 1902-08-30 1903-02-10 Roy W Brown Electric controller.
US1976534A (en) * 1930-01-13 1934-10-09 Bendix Brake Co Electric switch
US2716874A (en) * 1952-05-27 1955-09-06 Evans C Wiley Combined sound change-over and volume control for sound motion picture projectors
US3072757A (en) * 1960-01-22 1963-01-08 United Internat Dynamics Corp Electromechanical device
US3372359A (en) * 1967-01-30 1968-03-05 Carter Precision Electric Co Coordinated control for variable resistors
US3488611A (en) * 1966-11-22 1970-01-06 Globe Electrical Mfg Co Multiple switch control
US3665137A (en) * 1970-11-04 1972-05-23 Mallory & Co Inc P R Two switch actuator means

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US719991A (en) * 1902-08-30 1903-02-10 Roy W Brown Electric controller.
US1976534A (en) * 1930-01-13 1934-10-09 Bendix Brake Co Electric switch
US2716874A (en) * 1952-05-27 1955-09-06 Evans C Wiley Combined sound change-over and volume control for sound motion picture projectors
US3072757A (en) * 1960-01-22 1963-01-08 United Internat Dynamics Corp Electromechanical device
US3488611A (en) * 1966-11-22 1970-01-06 Globe Electrical Mfg Co Multiple switch control
US3372359A (en) * 1967-01-30 1968-03-05 Carter Precision Electric Co Coordinated control for variable resistors
US3665137A (en) * 1970-11-04 1972-05-23 Mallory & Co Inc P R Two switch actuator means

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4420273A (en) * 1980-11-05 1983-12-13 Firma Novotechnik Kg Offterdinger Gmbh & Co. Coupling device for the play-free connection of a precision potentiometer with a movable machine part
US4528544A (en) * 1983-09-12 1985-07-09 Allied Corporation Control apparatus for variable speed reversible motor
CN114753433A (zh) * 2022-05-30 2022-07-15 江苏朗禾控制系统有限公司 一种新型挖掘机单手柄控制系统及其控制方法

Also Published As

Publication number Publication date
DE2365849B2 (de) 1978-11-30
JPS4884402A (de) 1973-11-09
AU459878B2 (en) 1975-04-10
DE2304259B2 (de) 1976-09-09
CA962351A (en) 1975-02-04
DE2365849C3 (de) 1979-08-02
GB1423222A (en) 1976-02-04
DE2365849A1 (de) 1976-07-15
AU4823572A (en) 1974-05-02
DE2304259A1 (de) 1973-08-16

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AS Assignment

Owner name: DRESSER INDUSTRIES, INC., A CORP. OF DEL., STATELE

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:INTERNATIONAL HARVESTER COMPANY;REEL/FRAME:004130/0646

Effective date: 19821101

Owner name: DRESSER INDUSTRIES, INC., A CORP. OF DEL.

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:INTERNATIONAL HARVESTER COMPANY;REEL/FRAME:004130/0646

Effective date: 19821101

AS Assignment

Owner name: KOMATSU DRESSER COMPANY, E. SUNNYSIDE 7TH ST., LIB

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:DRESSER FINANCE CORPORATION, A CORP. OF DE.;REEL/FRAME:004994/0077

Effective date: 19880901

Owner name: DRESSER FINANCE CORPORATION, DALLAS, TX., A DE COR

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:DRESSER INDUSTRIES, INC.;REEL/FRAME:004994/0061

Effective date: 19880831