US3018010A - Hydraulic system for digging machines - Google Patents

Hydraulic system for digging machines Download PDF

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Publication number
US3018010A
US3018010A US691906A US69190657A US3018010A US 3018010 A US3018010 A US 3018010A US 691906 A US691906 A US 691906A US 69190657 A US69190657 A US 69190657A US 3018010 A US3018010 A US 3018010A
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US
United States
Prior art keywords
platform
boom
hydraulic
dipper stick
valves
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
US691906A
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English (en)
Inventor
Daniel F Przybylski
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.)
Warner and Swasey Co
Original Assignee
Warner and Swasey 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
Priority to DENDAT1288021D priority Critical patent/DE1288021B/de
Application filed by Warner and Swasey Co filed Critical Warner and Swasey Co
Priority to US691906A priority patent/US3018010A/en
Priority to US779219A priority patent/US2995261A/en
Priority to CH6862159A priority patent/CH368431A/de
Priority to BE574980D priority patent/BE574980A/xx
Priority to FR787793A priority patent/FR1217548A/fr
Priority to NL255022A priority patent/NL102898C/xx
Application granted granted Critical
Publication of US3018010A publication Critical patent/US3018010A/en
Priority to US30013463 priority patent/USRE25495E/en
Priority to US29969463 priority patent/USRE25538E/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • E02F9/003—Devices for transporting the soil-shifting machines or excavators, e.g. by pushing them or by hitching them to a tractor
    • 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
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/30—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam, i.e. boom
    • 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
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/30—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam, i.e. boom
    • E02F3/32—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam, i.e. boom working downwardly and towards the machine, e.g. with backhoes
    • 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
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/42—Drives for dippers, buckets, dipper-arms or bucket-arms
    • E02F3/425—Drive systems for dipper-arms, backhoes or the like
    • 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
    • E02F9/02—Travelling-gear, e.g. associated with slewing gears
    • 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
    • E02F9/0808—Improving mounting or assembling, e.g. frame elements, disposition of all the components on the superstructures
    • 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
    • E02F9/085—Ground-engaging fitting for supporting the machines while working, e.g. outriggers, legs
    • 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

Definitions

  • an objective of the invention is the provision of a control arrangement for excavating equipment in which all of the operations of the equipment are carried out by hydraulic power.
  • Another object of this invention is the provision of an hydraulic power system for an excavating machine in which a plurality of different movements of the machinery can be carried out simultaneously without the separate movements detracting substantially from the amount of hydraulic power available for carrying out any of the other movements.
  • a still further object of this invention is the provision of a control arrangement of the hydraulic power system of an excavating machine in which all of the controls are located in a central position for actuation by the operator of the machinery.
  • Another object of this invention is the provision of a power unit for use with portable excavating equipment in which the entire power unit is contained in the structure of the excavating unit so as to be movable therewith thus requiring no external source of power.
  • FIGURE 1 is a perspective view of a truck mounted excavating unit having a hydraulic system according to the present invention.
  • FIGURE 2 is a side elevational view of the structure of FIG. 1 with the excavating equipment in transport position.
  • FIGURE 3 is a plan view showing the excavating unit in the position which it occupies when it is collapsed for being transported by the truck on which it is mounted.
  • FIGURE 4 is a plan view looking down on top of the excavating equipment platform with the power unit and the boom and dipper stick and the operators cab removed therefrom.
  • FIGURE 5 is a plan view similar to FIG. 4, but taken at a lower level showing the arrangement for turning the excavating equipment platform about its bottom support.
  • FIGURE 6 is a sectional view indicated by line 6-6 on FIG. 2 showing a stabilizer assembly associated with the device and the hydraulic motor arrangement for actuating the pontoons thereof.
  • FIGURE 7 is a view showing the entire hydraulic circuit illustrated somewhat diagrammatically and the controls pertaining thereto, and,
  • FIGURE 8 is a fragmentary view showing an arrangement for limiting the rotative travel of the platform of the excavating unit.
  • the arrange ment illustrated in FIG. 1 comprises a truck T on which the excavating unit E is mounted, the said excavating unit comprising a tiltable boom and dipper stick assembly B and with there being provided at the rear end of the truck chassis a stabilizer assembly S to support the loads picked up by the excavating equipment so that these loads will not be imposed directly on the truck chassis.
  • the truck chassis indicated at 1, has the excavating unit mounted at its rear end and toward the front of the chassis and to one side thereof is the drivers cab 2. On the other side of the chassis in the front is an engine compartment 3.
  • the truck includes the steerable front wheels 4 and the tandam rear wheels 5.
  • the chassis 1 is made up of spaced channel members 6 fitted together in any conventional manner to form a rigid chassis unit.
  • the excavating equipment supported on the chassis has a stationary bottom support plate 7 bolted to the chassis as by the bolts and connecting strips 8. Fixed to the center of plate 7 is a cylindrical support structure 9 which forms the means for rotatably supporting the main platform of the excavating unit.
  • the main platform It) of the excavating unit may consist of vertically spaced plates interconnected by vertical flanges or ribs so as to form a stiff but relatively light unit.
  • rollers ll. Secured to the bottom of rotary platform 10 in any suitable manner are rollers ll. that engage the track formed about the support structure 9. These rollers assist in supporting and guiding the platform and in transmitting thrusts between the platform and the support plate.
  • a vertical post 12 that is engaged by a bearing 13 carried by the platform 10. This forms bearing means for holding the platform on a predetermined vertical axis of rotation.
  • boom 15 has pivoted to its outer end a dipper stick 16 and pivotally connected to the lower end of the dipper stick 16 is an earth working implement 17 which may be a conventional shovel bucket or a back hoe bucket.
  • the boom 15 is preferably made up of plates welded together or channels welded together to form a hollow box-like structure which is relatively light but which is extremely strong.
  • brackets 14 Pivotally connected to the boom beneath its pivotal connection to brackets 14 are rams 18 that extend into cylinders 19 that are pivotally supported at their opposite closed ends on the bracket means 2% fixed to platform 10. It will be evident that a supply of pressure fluid to cylinders 19 will cause tilting of boom 15 relative to platform 10.
  • a ram 21 Pivotally connected to the extreme upper end of dipper stick 16 above its pivotal connection with the end of the boom is a ram 21 that extends into a cylinder 22 which is pivoted at its closed end to a bracket 23 carried on top of the boom.
  • a reversible supply of fluid to cylinder 22 will cause tilting of the dipper stick on the boom.
  • the earth working implement 17 has connected therewith one end of a link 24 that is pivoted at its other end to ram 25 that extends into cylinder 26 that is pivotally supported at its closed end at 27 inside the dipper stick so that the cylinder is in a protected location.
  • a strut 28 is connected between the dipper stick and the point of connection between ram and link 24 so that a substantial moment arm is had for actuating. the implement throughout its normal travel.
  • Suitable flexible conduit means as indicated at 29 and 30 are provided for supplying hydraulic fluid to cylinders 22 and 26 as the boom and dipper stick are moved.
  • FIGS. 4 and 5 The rotation of platform 10 is also accomplished hydraulically and the arrangement for accomplishing this is illustrated in FIGS. 4 and 5.
  • gear 31 mounted on post 12 that is fixed to the bottom support plate of the excavating unit and meshing with gear 31 are racks 32 supported in proper engagement with the gear by adjustable back up rollers 33 which are mounted on the platform to.
  • the racks 32 are connected with rams that extend into cylinders 34 that have their closed end pivotally. supported as at 35 on platform 10 adjacent the edge thereof. It will be apparent that reversible energization of the motors formed by cylinders 34 and the rams pertaining thereto will cause rotary movement of platform It about the vertical pivot axis of the support structure 9.
  • the platform 10 is arranged to rotate through a full 360 from the stopped position in which itis illustrated in FIGS. 4 and 5.
  • the platform is also illustrated in this position in FIG. 3 and it will be noted that with the platform in this stopped position the boom assembly extends forwardly along the longitudinal axis of the .truck and that the dipper stick portion thereof maybe folded therebeneath so that the implement carried thereby can rest on engine compartment 3.
  • the boom itself may rest on a support frame 36 upstanding at the rear of the engine compartment and this frame 36 may engage the sides of the boom whereby the hydraulic system for the excavating unit may be de-energized and the entire assembly will remain in position on the truck chassis for transport by the truck.
  • The'stabilizer assembly is illustrated in FIG. 6.
  • FIG. 6 where the aforementioned stabilizer assembly is illustrated, it will be seen to comprise a transverse ly extending hollow structure 37 fixed to the rear edge of plate 7 and having pivoted to the outer ends thereof pontoons 38 and 39 which are connected with the rams 40 and 41, respectively, and which rams extend into the cylinders 42 and 43, respectively, that are pivotally sup ported at their closed end adjacent the center of frame 37.
  • FIG. 6 where the aforementioned stabilizer assembly is illustrated, it will be seen to comprise a transverse ly extending hollow structure 37 fixed to the rear edge of plate 7 and having pivoted to the outer ends thereof pontoons 38 and 39 which are connected with the rams 40 and 41, respectively, and which rams extend into the cylinders 42 and 43, respectively, that are pivotally sup ported at their closed end adjacent the center of frame 37.
  • the pontoon 38 is shown elevated to transport position and at this time will be positioned substantially within the limits of the platform 10 so as not to impede travel of the vehicle, while the left hand pontoon 39 is shown moved downwardly byits pertaining motor into ground engaging position so that loads picked up by the excavating unit are not imposed on the springs and running gear of the truck but are instead transmitted to the ground.
  • FIG. 7 To the left side of FIG. 7 is a group of control levers that are positioned Within the operators cab 44 mounted on platform llti to the side of the base of the boom so that the operator of the excavating unit can continuously see the movements of the earth working implement that it operates.
  • These controls comprise levers controlling the boom and dipper stick and two pontoons of the stabilizer assembly and the rotation of the platform, and a foot treadle that controls the movements of the implement carried by the dipper stick.
  • Hydraulic power for the hydraulic system is provided by a hydraulic pump 45 that is arranged for being driven by an internal combustion engine carried by platform 10 and located within a housing 46.
  • Hydraulic pump 45 is preferably a tandem pump so that one section supplies one portion of the hydraulic circuit and another section supplies another portion thereof whereby different movements of the excavating unit can be carried out simultaneously without any substantial reduction in the quantity or the pressure of the fluid available for carrying out other movements.
  • hydraulic pump 45 will be seen to have a first pressure conduit 47 leading therefrom to a pressure manifold 48 mounted on one side of a group of interconnected valves which have at their other sides an exhaust manifold 49 connected with exhaust conduit 5t) leading to reservoir 51 which is also mounted on platform 10 as will be seen in FIG. 1.
  • the valve arrangement is such that the pressure manifold 48 supplies pressure to the pressure inlets of all the valves while the exhaust manifold 49 conducts exhaust fluid from all thereof.
  • the entire group of valves consists of normally spring-centered, closed center, four-way valves and the group of valves referred to consists of a valve 52 connected with opposite ,ends of therplatform rotating'cylinders 34.
  • Valve 52 is adapted for being controlled by a link 55 that connects, the valve member thereof with operating lever 56 in the operators cab.
  • a second valve 57 of the group of valves has one service port plugged and the other service port connected by conduit 58 with the outer end of dipper stick cylin-- der 22 and to which end of the cylinder a supplyv of pressure fluid will cause outward movement of the lower end' of the dipper stick on the boom.
  • Valve 57 has its valve member connected with one leg of the double link 59 leading to lever 60 in the operators cab.
  • a relief valve 61 is connected between conduit 58 and exhaust, conduit 50 to relieve extreme pressure built up in the system.
  • a third valve of the group at 62 is connected by con duits 63 with opposite ends of one of the stabilizer cyl-- inders for raising and lowering the pertaining pontoon.
  • the valve member of this valve is connected by a link 64 with lever 65 in the operators cab.
  • the final valve 66 of the group of valves referred to, is connected by conduits 67 with the other one of the stabilizer cylinders for controlling the other pontoon thereof and the valve member or" this valve is connected by link 63 with control lever 69 in the operators cab.
  • the other section of the dual pump 45 is connected by conduit 70 with a pressure manifold 71 corresponding, generally, to pressure manifold 48.
  • Pressure manifold 71 supplies pressure fluid to a second group of valves which are also normally spring centered, closed center, four-way valves. These valves have their exhaust sides connected with an exhaust manifold 72 that is connected with exhaust conduit 50.
  • One of the valves of the second group adjacent the pressure manifold is indicated at 73 and is connected by conduits 74 with the opposite ends of the cylinder 26 pertaining to the implement carried by the dipper stick.
  • the valve member of this valve is connected by a link 75 with a crank 76 arranged for actuation by foot treadle 77 located in the operators cab.
  • a second valve 78 of the second group of valves, has one service port connected by a conduit 79 with the ends of the boom cylinders 15 to which pressure fluid is delivered for lifting the boom on the platform.
  • the other service port of this valve is connected by a conduit 80 through a relief valve 81 with the opposite ends of cylinders l5 and this conduit is also connected through a. relief valve 32 with the exhaust conduit 50.
  • Valve 78 has its valve member connected by a link with control lever 86 located within the operators cab.
  • valve 83 has one service port connected by a conduit 84 with the end of cylinder 22 opposite the connection thereto of conduit 58 and the other service port is plugged.
  • Valve 83 has its valve member connected with the second leg of link 59 which is operated by control lever 60.
  • the hydraulic control circuit described in detail above is effective for controlling all of the operative movements which are likely to occur in such a manner that a full supply of hydraulic pressure fluid is available therefor are controlled from separate banks of valves.
  • the operation of the pontoons is carried out by the upper bank of valves. This operation is one not requiring a continuous supply of hydraulic fluid.
  • the upper bank of valves also supplies the fluid for causing the dipper stick to swing outwardly of the boom and likewise controls the rotation of the platform. These functions seldom occur at the same time and when they do, the movements can be carried out at low pressure.
  • the other bank of valves controls the supply of fluid for tilting the implement on the dipper stick, for raising and lowering the boom, and for swinging the dipper stick inwardly on the boom.
  • the rotation of the platform is normally limited by a mechanical stop arrangement generally indicated at 90 and which consists of a stationary abutment mounted on bottom support plate 7 and the pawls carried by the platform 10', each adapted for engaging the stop member in one direction of rotation only.
  • a mechanical stop arrangement generally indicated at 90 and which consists of a stationary abutment mounted on bottom support plate 7 and the pawls carried by the platform 10', each adapted for engaging the stop member in one direction of rotation only.
  • the control of the rotation of the platform can also be accomplished by a hydraulic arrangement illustrated in FIG. 8.
  • the link 55 leading to the valve member of the turning cylinder control valve 52 has associated therewith, by means of the tension springs 91, a lever 92, pivoted at 93 to platform 10 and carrying at its end opposite its spring connection between the platform 10 and the valve member actuating link, a roller 94 engageable between the cams 95 carried on support plate 7.
  • the arrangement is such that when the platform swings toward the position in which it is supposed to stop, one of the cams 95 will engage roller 94 and shift lever 92 in a direction to move the valve member of the control valve for the turning cylinders into its neutral position thereby bringing the platform to a halt.
  • the resilient connection provided by springs 91 between the actuating link 55 and lever 92 and between lever 92 and platform 10 permit movement of the actuating link to set the platform into rotation but in the opposite direction which it is desired to move the platform from its stopped position.
  • the described arrangement provides for a complete hydraulic operating system for the excavating unit that permits complete control of all of the movements of the equipment at all times, and with precise control of the amount and speed of the movements and with there being an adequate supply of pressure fluid available at all times for operating all of the various components of the excavating unit.
  • an excavating unit a rotatable platform; a boom pivoted on the platform, a dipper stick pivoted on the outer end of the boom, and the lower end of said dipper stick being adapted for pivotally receiving an earth working implement, hydraulic motors for rotating the platform, for tilting the boom on the platform, for tilting the dipper stick on the boom, and for tilting the implement on the dipper stick, a tandem hydraulic pump on the platform and a driving engine therefor, a bank of remotely placed valves pertaining to each section of the pump and each bank of valves controlling predetermined ones of the motors of said excavating unit, and control lever means for actuation by the operator of the unit to control the movements thereof, a first group of said valves controlling rotation of said platform, and movement of said dipper stick in one direction, and the other bank of said valves controlling movements of said implement, the movements of said boom, and the movements of said dipper stick in the opposite direction.
  • a platform a boom pivoted on a horizontal axis to the platform and extending upwardly and outwardly therefrom, a dipper stick pivoted to the outer end of the boom and extending downwardly therefrom, an earth working implement pivoted to the lower end of the dipper stick, a hydraulic motor connected between the platform and the boom for raising and lowering the boom on the platform, a hydraulic motor connected between the dipper stick and the boom for swinging the dipper stick on the boom, and a hydraulic motor connected between the dipper stick and the implement to move the implement on the dipper stick, a pair of hydraulic pumps, valves connecting one of said hydraulic pumps with one end of the dipper stick motor, a relief valve for relieving pressures above the predetermined value in the one end of the dipper stick motor, other valve means connecting the other of the pumps with the hydraulic motor pertaining to the implement and to the hydraulic motor pertaining to the boom and to the other end of the dipper stick motor, and relief valve means pertaining to the second pump for relieving pressures therein different

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)
  • Operation Control Of Excavators (AREA)
  • Component Parts Of Construction Machinery (AREA)
US691906A 1957-10-23 1957-10-23 Hydraulic system for digging machines Expired - Lifetime US3018010A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
DENDAT1288021D DE1288021B (fr) 1957-10-23
US691906A US3018010A (en) 1957-10-23 1957-10-23 Hydraulic system for digging machines
US779219A US2995261A (en) 1957-10-23 1958-12-09 Mobile excavators
BE574980D BE574980A (fr) 1957-10-23 1959-01-22
CH6862159A CH368431A (de) 1957-10-23 1959-01-22 Fahrbarer Bagger
FR787793A FR1217548A (fr) 1957-10-23 1959-02-26 Perfectionnements aux excavatrices mobiles
NL255022A NL102898C (fr) 1957-10-23 1960-08-18
US30013463 USRE25495E (en) 1957-10-23 1963-08-01 Mobile excavators
US29969463 USRE25538E (en) 1957-10-23 1963-08-01 Arrangement in mobile excavators

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US691906A US3018010A (en) 1957-10-23 1957-10-23 Hydraulic system for digging machines
NO3021023X 1959-08-19

Publications (1)

Publication Number Publication Date
US3018010A true US3018010A (en) 1962-01-23

Family

ID=32396406

Family Applications (4)

Application Number Title Priority Date Filing Date
US691906A Expired - Lifetime US3018010A (en) 1957-10-23 1957-10-23 Hydraulic system for digging machines
US779219A Expired - Lifetime US2995261A (en) 1957-10-23 1958-12-09 Mobile excavators
US29969463 Expired USRE25538E (en) 1957-10-23 1963-08-01 Arrangement in mobile excavators
US30013463 Expired USRE25495E (en) 1957-10-23 1963-08-01 Mobile excavators

Family Applications After (3)

Application Number Title Priority Date Filing Date
US779219A Expired - Lifetime US2995261A (en) 1957-10-23 1958-12-09 Mobile excavators
US29969463 Expired USRE25538E (en) 1957-10-23 1963-08-01 Arrangement in mobile excavators
US30013463 Expired USRE25495E (en) 1957-10-23 1963-08-01 Mobile excavators

Country Status (6)

Country Link
US (4) US3018010A (fr)
BE (1) BE574980A (fr)
CH (1) CH368431A (fr)
DE (1) DE1288021B (fr)
FR (1) FR1217548A (fr)
NL (1) NL102898C (fr)

Cited By (6)

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US3129832A (en) * 1960-05-18 1964-04-21 Auxiliaire De L Entpr Soc Multiple-purpose power shovel
US3481251A (en) * 1968-02-05 1969-12-02 Warner Swasey Co Machine with hydraulic boom
US3674162A (en) * 1970-12-21 1972-07-04 Hy Dynamic Co Rough terrain vehicle
US3674161A (en) * 1970-04-06 1972-07-04 King Co Inc Lift boom assembly
FR2581404A1 (fr) * 1985-05-03 1986-11-07 Poncin Gilles Engin de terrassement tous terrains
US11682228B2 (en) 2019-07-17 2023-06-20 Invensense, Inc. Ultrasonic fingerprint sensor with a contact layer of non-uniform thickness

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CH406993A (de) * 1963-01-14 1966-01-31 Von Roll Ag Tropfkörper mit Drehsprinkler
US3169650A (en) * 1963-12-23 1965-02-16 Soyland Ingebret Transport arrangement for mobile excavator
US3261478A (en) * 1964-03-10 1966-07-19 Svenska Hymas Ab Jacking device for vehicles
US3351222A (en) * 1965-08-09 1967-11-07 Western Body And Hoist Company Trash hauling truck
US3333718A (en) * 1965-11-08 1967-08-01 Marion E Durham Towing trailer
AT293960B (de) * 1968-10-08 1971-11-10 Menzi Ag Ernst Arretiervorrichtung für ein antriebsloses Rad oder Räderpaar eines Baggers
DE2013849A1 (de) * 1970-03-23 1971-10-21 Karl Schaeff Kg Maschinenfabrik, 7183 Langenburg Anbaubagger
US3688929A (en) * 1970-09-30 1972-09-05 Skagit Corp Lift truck with rotatable carriage
US3854606A (en) * 1971-11-26 1974-12-17 Cascade Corp Vehicle with material loader
DE2725357A1 (de) * 1977-06-04 1978-12-07 Fuchs Fa Johannes Verfahrbare arbeitsmaschine
US4212582A (en) * 1978-07-20 1980-07-15 Deere & Company Linkage to allow increased angular rotation of backhoe boom
DE2914371C2 (de) * 1979-04-10 1986-12-18 Claas Ohg, 4834 Harsewinkel Verfahren und Vorrichtung zum Anheben des vorderen Teiles eines selbstfahrenden Mähdreschers
US4235567A (en) * 1979-04-11 1980-11-25 Ware Machine Service, Inc. Material handling machine with adjustable speed-power relationship for boom movement
US5423655A (en) * 1993-01-14 1995-06-13 Kabushiki Kaisha Komatsu Seisakusho Working machine for hydraulic excavator
DE9410041U1 (de) * 1994-06-24 1994-09-08 Seg Umwelt Service Gmbh Kontrollfahrzeug für Deponien und kontaminierte Bereiche
US6679511B2 (en) 2002-05-08 2004-01-20 Donald M. Parker Heavy equipment transporter

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US2754977A (en) * 1951-10-25 1956-07-17 Daniel F Przybylski Grave digger
US2711257A (en) * 1952-03-14 1955-06-21 Jaeger Machine Co Portable shovel loader
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US2840254A (en) * 1955-04-15 1958-06-24 James I Bevan Clamshell earth-moving machine
US2846096A (en) * 1955-06-06 1958-08-05 Hough Co Frank Tractor loaders
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US2927706A (en) * 1956-07-20 1960-03-08 Bucyrus Erie Co Hydraulically-operated dipper
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US3481251A (en) * 1968-02-05 1969-12-02 Warner Swasey Co Machine with hydraulic boom
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Also Published As

Publication number Publication date
USRE25495E (en) 1963-12-17
USRE25538E (en) 1964-03-17
NL102898C (fr) 1962-10-15
CH368431A (de) 1963-03-31
US2995261A (en) 1961-08-08
BE574980A (fr) 1959-02-14
FR1217548A (fr) 1960-05-04
DE1288021B (fr)

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