US3616953A - Narrow-aisle truck with retractable arms - Google Patents

Narrow-aisle truck with retractable arms Download PDF

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Publication number
US3616953A
US3616953A US822843A US3616953DA US3616953A US 3616953 A US3616953 A US 3616953A US 822843 A US822843 A US 822843A US 3616953D A US3616953D A US 3616953DA US 3616953 A US3616953 A US 3616953A
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US
United States
Prior art keywords
wheels
truck
chassis
steerable
arms
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
US822843A
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English (en)
Inventor
Walter M Shaffer
John T Crawford
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 Industrial Inc
Original Assignee
Towmotor Corp
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Filing date
Publication date
Application filed by Towmotor Corp filed Critical Towmotor Corp
Application granted granted Critical
Publication of US3616953A publication Critical patent/US3616953A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks

Definitions

  • straddlebase trucks with front outrigger members having such dimensions to permit straddling the load to be picked up, and trucks containing a pantograph mechanism for reaching beyond the forward outrigger wheels to engage the load.
  • trucks containing a pantograph mechanism for reaching beyond the forward outrigger wheels to engage the load.
  • a counterbalanced truck is normally used, wherein the front of the mast is always located ahead of the front wheels, and counterbalancing weight is applied behind the front wheels for stability.
  • the subject invention readily fulfills the requirement of operating in the narrowest possible aisle space with the stability of a counterbalanced truck and without the disadvantages of the existing narrow-aisle trucks.
  • reach mechanisms have visibility limitations and high maintenance costs; both reach trucks and straddle trucks have exposed operator compartments which constitute a safety hazard and, in addition, have poor accessibility to the electric storage bat tery.
  • the subject invention accomplishes the sought-after requirement by providing a variable wheelbase which may be changed for any given size load.
  • the wheelbase is varied by means of hydraulically extending and retracting two of the vehicle wheels along the longitudinal axis of the vehicle. Additionally, the provision of an extended wheelbase produces improved stability when transporting loads.
  • FIG. 1 is a plan view of a lift truck utilizing the present invention
  • FIG. 2 is a side elevation view of the lift truck shown in FIG.
  • FIG. 3 is a front elevation, partly in section, of the lift truck shown in FIGS. 1 and 2;
  • FIGS. 4-7 illustrate plan views of the lift truck embodying the present invention, and the manner in which it is used to place a load in position.
  • FIGS. 1-3 there is shown a lift truck 10 having an operator's compartment 12, to the rear of which is a large compartment 14 which contains the vehicle batteries and motor or an engine.
  • a pair of steerable drive wheels 18 are mounted on the vehicle below the compartment 14, the wheels beingsteerable by any well-known mechanism (not shown).
  • a mast pivot support 20 On the forward portion of the vehicle, a mast pivot support 20 carries a mast 22 which is pivotable about bearings 24. Also on the forward portion of the vehicle, a sideshifter carriage 28 carries a pair of load forks 30.
  • a pair of nonsteerable load wheels 32 are mounted on movable arms 34 which are of a channel cross section. As clearly shown in FIGS. 1 and 2, the nonsteerable load wheels are in the extended position. When retracted, the axes of the wheels are withdrawn to the left until their axes are nearly on a vertical line drawn from the axes of the bearings 24.
  • a pair of guide rollers 36 are mounted in fixed relationship to the lift truck 10, and a pair of movable guide rollers 38 are mounted on the rear end of the movable arm assembly 34.
  • a hydraulic cylinder 40 on each side: of the truck, is utilized to extend and retract the arm assembly 34.
  • the wheels 38 are moved towards the wheels 18 until the wheels 32 reach the position previously described.
  • the cylinder 40 can be actuated in any desired amount so that the wheels 32 may be positioned in accordance with the operator's desire.
  • a pair of stationary channel members 42 are welded to the main frame of the lift truck l0 and the wheels 38 ride within the channels thereof.
  • the wheels 32 and the wheels 18 are each provided with selective brakes, as at 33 and 19 respectively, so that the operation of the cylinders 40 can be utilized either to retract the load toward the vehicle, or to pull the entire truck body forward towards the load.
  • the sideshifter carriage 28 may then be actuated by the operator to center the load within the storage area, so that the vehicle and load attain the positions shown in FIG. 7.
  • the forks are lowered to deposit the load and the hydraulic cylinders on the load arms are extended, causing the truck body, mast, car riage, and forks to move rearwardly.
  • the operator may then turn the steerable wheels, release the brakes on the wheels 32, move the truck back to its original position and proceed to another location.
  • the operator may simply drive the truck out of the space in a manner similar to well-known forklift trucks without extensible anns.
  • a load-carrying truck comprising a self-propelled chassis having at least one steerable wheel thereon, wheel base changing means comprising a pair of arms retractably mounted on said chassis and on which are rotatably fixed a pair of nonsteerable wheels, a pair of lifting forks vertically movably mounted on said chassis, means fixed to the chassis for extending and retracting the arms, and brake means associated with both steerable and nonsteerable wheels so that when either the steerable or nonsteerable wheels are braked, the nonbraked wheels are moved toward the braked wheels when the extending and retracting means is actuated.
  • the truck of claim 1 including a sideshifter carriage to which the forks are fastened so that they may be moved in a direction perpendicular to the truck's longitudinal axis.
  • a load-carrying truck comprising a self-propelled chassis defining front and rear ends, at least one steerable wheel on the rear end of said chassis, a pair of arms retractably mounted on the front end of said chassis, a pair of nonsteerable wheels mounted on said arms, mast means mounted on the front end of said chassis and vertically, movably supporting load forks, means for extending and retracting said arms whereby the truck wheelbase may be changed, and brake means associated with both steerable and nonsteerable wheels so that when either the steerable or nonsteerable wheels is braked, the nonbraked wheels are moved toward the braked wheels when the extending and retracting means is actuated thereby moving the chassis to the braked wheels.
  • the truck of claim 4 wherein the mast means comprises a pivotally mounted mast, a sideshifter carriage and means to sideshift said carriage.

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Handcart (AREA)
US822843A 1969-04-14 1969-04-14 Narrow-aisle truck with retractable arms Expired - Lifetime US3616953A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US82284369A 1969-04-14 1969-04-14

Publications (1)

Publication Number Publication Date
US3616953A true US3616953A (en) 1971-11-02

Family

ID=25237115

Family Applications (1)

Application Number Title Priority Date Filing Date
US822843A Expired - Lifetime US3616953A (en) 1969-04-14 1969-04-14 Narrow-aisle truck with retractable arms

Country Status (6)

Country Link
US (1) US3616953A (enrdf_load_stackoverflow)
JP (1) JPS5026823B1 (enrdf_load_stackoverflow)
BE (1) BE748733A (enrdf_load_stackoverflow)
DE (1) DE2017624A1 (enrdf_load_stackoverflow)
FR (1) FR2039156A7 (enrdf_load_stackoverflow)
GB (1) GB1305927A (enrdf_load_stackoverflow)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3994083A (en) * 1974-09-25 1976-11-30 Cunningham James E Trencher construction
US4024968A (en) * 1975-09-02 1977-05-24 Towmotor Corporation Heavy lift side loader truck
US4435113A (en) 1981-08-24 1984-03-06 Superior Handling Equipment, Inc. Self-propelled freight handling truck
US4571139A (en) * 1981-08-24 1986-02-18 Superior Handling Equipment, Inc. Self-propelled freight handling truck
US4690610A (en) * 1986-04-24 1987-09-01 Caterpillar Industrial Inc. Lift mast transport arrangement
US6343674B1 (en) * 1999-03-03 2002-02-05 Hugh Sexsmith Multi-terrain vertical lift transporter
US6398480B1 (en) * 1999-10-30 2002-06-04 Jungheinrick Aktiengesellschaft Fork lift truck
EP1150124A3 (en) * 2000-04-25 2003-10-22 Kabushiki Kaisha Toyota Jidoshokki Rotation detector in reach cargo vehicle and wheel for reach cargo vehicle
US20060214407A1 (en) * 2005-02-25 2006-09-28 Linde Aktiengesellschaft Industrial truck with at least one wheel arm and method for assembling the industrial truck
US20070205056A1 (en) * 2005-11-10 2007-09-06 Crown Equipment Corporation Materials handling vehicle with improved visibility

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101765701B (zh) 2007-07-03 2013-07-10 O·M·P·奥菲奇内·马佐科·帕尼奥尼有限公司 用于机动车辆发动机的真空泵
JP7114536B2 (ja) * 2019-09-10 2022-08-08 株式会社東芝 運搬装置
JP7395444B2 (ja) * 2020-09-07 2023-12-11 株式会社東芝 運搬装置、制御方法、およびプログラム

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1799307A (en) * 1927-01-27 1931-04-07 Robert E Manley Lifting device
US2320601A (en) * 1943-01-20 1943-06-01 Roy C Howell Industrial truck
US2851182A (en) * 1956-07-10 1958-09-09 William F Gehring Attachment for material handling equipment

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1799307A (en) * 1927-01-27 1931-04-07 Robert E Manley Lifting device
US2320601A (en) * 1943-01-20 1943-06-01 Roy C Howell Industrial truck
US2851182A (en) * 1956-07-10 1958-09-09 William F Gehring Attachment for material handling equipment

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3994083A (en) * 1974-09-25 1976-11-30 Cunningham James E Trencher construction
US4024968A (en) * 1975-09-02 1977-05-24 Towmotor Corporation Heavy lift side loader truck
US4435113A (en) 1981-08-24 1984-03-06 Superior Handling Equipment, Inc. Self-propelled freight handling truck
US4571139A (en) * 1981-08-24 1986-02-18 Superior Handling Equipment, Inc. Self-propelled freight handling truck
US4690610A (en) * 1986-04-24 1987-09-01 Caterpillar Industrial Inc. Lift mast transport arrangement
US6343674B1 (en) * 1999-03-03 2002-02-05 Hugh Sexsmith Multi-terrain vertical lift transporter
US6398480B1 (en) * 1999-10-30 2002-06-04 Jungheinrick Aktiengesellschaft Fork lift truck
EP1150124A3 (en) * 2000-04-25 2003-10-22 Kabushiki Kaisha Toyota Jidoshokki Rotation detector in reach cargo vehicle and wheel for reach cargo vehicle
US20060214407A1 (en) * 2005-02-25 2006-09-28 Linde Aktiengesellschaft Industrial truck with at least one wheel arm and method for assembling the industrial truck
US8256578B2 (en) * 2005-02-25 2012-09-04 Linde Material Handling Gmbh Industrial truck with two wheel arms and method for assembling the industrial truck
US20070205056A1 (en) * 2005-11-10 2007-09-06 Crown Equipment Corporation Materials handling vehicle with improved visibility
US8104583B2 (en) * 2005-11-10 2012-01-31 Crown Equipment Corporation Materials handling vehicle with improved visibility
US8678138B2 (en) 2005-11-10 2014-03-25 Crown Equipment Corporation Materials handling vehicle with improved visibility
US9550660B2 (en) 2005-11-10 2017-01-24 Crown Equipment Corporation Materials handling vehicle with improved visibility

Also Published As

Publication number Publication date
GB1305927A (enrdf_load_stackoverflow) 1973-02-07
FR2039156A7 (enrdf_load_stackoverflow) 1971-01-15
DE2017624A1 (de) 1970-10-15
JPS5026823B1 (enrdf_load_stackoverflow) 1975-09-03
BE748733A (fr) 1970-10-09

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