US1400931A - Roller-base lifting-jack - Google Patents

Roller-base lifting-jack Download PDF

Info

Publication number
US1400931A
US1400931A US240976A US24097618A US1400931A US 1400931 A US1400931 A US 1400931A US 240976 A US240976 A US 240976A US 24097618 A US24097618 A US 24097618A US 1400931 A US1400931 A US 1400931A
Authority
US
United States
Prior art keywords
base
jack
roller
rollers
ground
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
US240976A
Other languages
English (en)
Inventor
Sydney P Barker
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.)
ARROW GRIP MANUFACTURING Co Inc
Original Assignee
ARROW GRIP Manufacturing CO Inc
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 ARROW GRIP Manufacturing CO Inc filed Critical ARROW GRIP Manufacturing CO Inc
Priority to US240976A priority Critical patent/US1400931A/en
Priority to FR534032D priority patent/FR534032A/fr
Application granted granted Critical
Publication of US1400931A publication Critical patent/US1400931A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • B66F13/00—Common constructional features or accessories

Definitions

  • a lifting jack with a base, or a base to be attached to a lifting jack, roller supporting means movable relatively to the base and resilient means acting on the roller supporting means and the base, the elements specified being so combined and arrangedvthat the roller supporting means normally acts on the ground and the jack and base derive their normal support from the roller supporting means and are normally held above or free from the ground, thus providing for the easy transportation or manipulation of the jack in placing the same beneath the axle or other load to be lifted or 'vhile removing the same from the operating position, but permitting the base to move downward relatively to the roller supporting means into positive and direct engagement with the ground when the load is brought to bear upon the jack, the resilient means acting automatically to restore the roller supporting means to normal or jack supporting position when the load is relieved from the jack.
  • Fig. 2 is a similar view but indicating the change of position of the jack at the moment the axle is about to be lifted, the base having been forced down into direct, positive and frictional engagement' with the ground.
  • Fig. 3 is a plan view of the base attach- -ment as it would be seen from the plane of the line .3-3 of Fig. 1, a corner portion of the structure being broken away to more clearly indicate the manner of assemblage.
  • Fig. el is a vertical longitudinal section of a modilication on the line Ll-l of Fig. 6, the anti-friction rollers being indicated in the same relative position to the base as in F ig. l.
  • Fig. 5 is a view similar to Iig. 4, but showing ⁇ the changed position ofthe parts asin Fig. 2;
  • Fig. 6 is a bottom plan view of thesame.
  • l0 represents a lifting jack of any suitable or approved design or construction having a plunger 11, an operating member l2, and any suitable power multiplying devices acting between the operatingmember and the vertically movable plunger.
  • the anti-friction roller supporting means consists of four rollers 13 which are movably associated with the base portion of the jack, either directly or with a supplemental base 14 detachably connected to the main portion ofthe jack, one of the rollers being arranged adjacent each corner of the base.
  • each roller is so mounted or connected to the base 14 as to swing' with its. roller around the axis of a pivot connectlon 16 whereby the roller is adapted to move up and down with relation to the base 14.
  • auxiliary base 14 is made of a solid block of material such as wood whereby the jack is adapted to be supported upon the ground with a minimum amount of slippage while sustaining the load.
  • the base 14 may readily be attached to the main portion of the jack by means of screws 17 or the like.
  • This base is transversely bored at 18 adjacent and parallel to the ends thereof.
  • each of the bell cranks is tapped at one end 21 to receive the journal or axle 15 on which the adjacent wheel is journaled for free rotation.
  • the axle 15, however, is preferabl permanently fixed to the threaded end o the bell crank so as to prevent unscrewing of the axle and displacement or loss of the wheel thereon.
  • the bell cranks 19 are arranged in pairs, the members of each pair being mounted u on the ends ofthe pivot connection 16. ne bell crank of each pair may be said to be paired with the bell crank of the other pair that lies on the same side of the base 14.
  • rollers may be regarded as arranged in end pairs'and also in side pairs.
  • the rollers 13 are acted on by resilient means which normally project their lower portions below ⁇ the under surface of the base 14, and yet permit said base to bear down squarely and directly upon the grbund under the pressure of the load upon the ack.
  • the end members of the bell cranks of each side pair of bell cranks are directed more or less towardeach other and connecting them is a coil spring bear upon the jack in the ordinary operation thereof the springs are put under ten sile strain while the bell cranks oscillate around the axes of the pivot connections 16 and rise relatively while. the spring-connected ends of the bell cranks swing downward toward the ground.
  • each roller is preferably independent of the others.
  • each wheel support or bell crank is free to rotate around the pivot connection 16 except as above described, that is to say, any of the rollersmay oscillate around the axis of the pivot 16 independently of the others so if the jack should be operated over cobble stones or any other uneven surface the rollers will naturally accommodate themselves to slich surface without material resistance.
  • Figs. 4, 5 and 6 I represent thel improvement as constituting an integral part of the jack base or casing, the base 14 being in the nature of a hollow rectangle open at the under side and of adequate strength to sustain any load that may be brought to bear upon the jack, the same being shown as including side and end flanges 24 and 25 deep enough to house the rollers 13 and the oscillating members upon which they are journaled.
  • the bell cranks 19 are or may be substantially the same as those already described and hence are similarly indicated by reference characters as well as the springs 23 constituting the direct connections between the side pairs of roller supports.
  • a lifting jack In a lifting jack, a rigid base adapted to bear directly upon the ground and so sus-V tain the load brought upon the jack, a series of anti-friction rollers adjacent to the corners of the base, and means connecting said rollers resiliently to the base, said connecting means including a series of oscillating members, one for each roller, and spring means acting upon the oscillatory members and serving to elevate the base free from the ground when the jack is unloaded.
  • a lifting jack the combination of a base adapted to bear directly upon the ground and so support the entire load brought to, bear upon the jack, a plurality of bell cranks, pivdt means connecting the bell cranks to the base on horizontal axes, an anti-friction roller journaled on one end of each bell crank and movable in a vertical plane with the bell crank around the pivot thereof, and spring means acting constantly upon the other end of each bell crank tending i to swing the roller downward below the bottom of the base.
  • a lifting jack the combination of a rectangular base having holes formed therethrough parallel to the ends of the base, a pair of pivotV members extending through said holes, an end pair of bell cranks mounted upon. each pivot connection and adapted to oscillate in vertical planes adjacent to the corners of the base, an anti-friction roller carried by one arm of each bell crank, and coil springs connected to the arms of' the bell cranks remote from the ends supporting the rollers and tending to project the rollers downward below the bottom of the base but yielding under the weight of the load brought to bear upon the jack to allow the base to bear directly and frictionally uponthe ground.
  • the herein described base for a liftinu" C jack comprising a strong rigid load supportvlng member adapted to engage directly and thereby, anti-friction rollers mounted to oscillate in vertical planes upon said pivot members, and resilient means acting upon the rollers tending to project them below the bottom surface of the base.
  • a portable load-supporting jack a hollow rectangular jackcarrying base open at its under side and formed for stable engagement with the ground, a plurality of rollers movably mounted within the; base, one adjacent each corner thereof and movable through the open under side and resilient means acting between the rollers and base normally to hold the base free from the ground and also to permit the base to move downward into contact with the ground consequent to the application of loading pressure on the jack whereby under the pressure of the load said base will assume the function of supporting the jack in a position to which it may be moved on the rollers, each roller being yieldable relatively to the baseindependently of the other rollers.
  • a portable load-supporting jack a hollow rectangular jack-carrying base open at its under side and formed for a stable engagement with the ground, a plurality of rollers movably mounted within the base, one. adjacent each corner thereof and movable through the open under side and resilient means acting between the rollers and the base normally to hold the base free from the ground and also to permit the base to move downward into direct contact with the ground consequent to the application of loading pressure on the jack whereby under the pressure of the load said base Ywill assume the function of supportin the jack in a position to which it may e moved on the rollers.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
US240976A 1918-06-20 1918-06-20 Roller-base lifting-jack Expired - Lifetime US1400931A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US240976A US1400931A (en) 1918-06-20 1918-06-20 Roller-base lifting-jack
FR534032D FR534032A (fr) 1918-06-20 1919-06-19 Perfectionnements apportés aux crics

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US240976A US1400931A (en) 1918-06-20 1918-06-20 Roller-base lifting-jack

Publications (1)

Publication Number Publication Date
US1400931A true US1400931A (en) 1921-12-20

Family

ID=22908692

Family Applications (1)

Application Number Title Priority Date Filing Date
US240976A Expired - Lifetime US1400931A (en) 1918-06-20 1918-06-20 Roller-base lifting-jack

Country Status (2)

Country Link
US (1) US1400931A (fr)
FR (1) FR534032A (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2456218A (en) * 1946-10-04 1948-12-14 Kurt F Semisch Jack support
US2545403A (en) * 1948-05-11 1951-03-13 John J Wrenn Lifting jack mechanism
US2891765A (en) * 1955-11-25 1959-06-23 Frank S Pearne Jack
US2891764A (en) * 1956-07-13 1959-06-23 Frank S Pearne Jack structure supported by spring mounted wheels
US3197235A (en) * 1963-02-25 1965-07-27 Fruehauf Corp Removable self-stabilizing landing gear for semi-trailers
US6843487B1 (en) * 2002-10-07 2005-01-18 David Barry Lotman Mobile lift assembly for a vehicle
US20070040369A1 (en) * 2005-08-16 2007-02-22 Lotman David B Mobile lift assembly
US9758133B2 (en) 2014-02-05 2017-09-12 Innovative Inventions, LLC Vehicle lifting and parallel parking aid

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE739337C (de) * 1941-04-08 1943-09-22 Walter Philipp Krick An der Grundplatte eines fahrbaren Wagenhebers angelenkte, zusammenlegbare und zum Unterschieben des Wagenhebers unter einen Kraftwagen dienende Handgriffstange

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2456218A (en) * 1946-10-04 1948-12-14 Kurt F Semisch Jack support
US2545403A (en) * 1948-05-11 1951-03-13 John J Wrenn Lifting jack mechanism
US2891765A (en) * 1955-11-25 1959-06-23 Frank S Pearne Jack
US2891764A (en) * 1956-07-13 1959-06-23 Frank S Pearne Jack structure supported by spring mounted wheels
US3197235A (en) * 1963-02-25 1965-07-27 Fruehauf Corp Removable self-stabilizing landing gear for semi-trailers
US6843487B1 (en) * 2002-10-07 2005-01-18 David Barry Lotman Mobile lift assembly for a vehicle
US20070040369A1 (en) * 2005-08-16 2007-02-22 Lotman David B Mobile lift assembly
US9758133B2 (en) 2014-02-05 2017-09-12 Innovative Inventions, LLC Vehicle lifting and parallel parking aid

Also Published As

Publication number Publication date
FR534032A (fr) 1922-03-16

Similar Documents

Publication Publication Date Title
US1400931A (en) Roller-base lifting-jack
US2624535A (en) Elevating platform for typewriters
CN108033392B (zh) 一种移动式物资装卸辅助平台
US20160347227A1 (en) Height adjustable loading ramp
CN205312978U (zh) 一种建筑施工平稳装置
US2415655A (en) Load pickup hand truck
US2504885A (en) Adjustable counterweight lift truck
CN110356856A (zh) 双地轨支撑型堆垛机
US3387686A (en) Wheel chock
US3902699A (en) Propeller jacks
US2176636A (en) Truck
US2557465A (en) Portable lifting jack
CN116605801A (zh) 承载装置及管道安装设备
US2403636A (en) Elevator
US1415857A (en) Roller-base lifting jack
CN108146971A (zh) 一种船舶用可移动折叠式的传动装置的仓储设备
US1290267A (en) Transportable adjustable automobile-rack.
US1100702A (en) Truck.
KR200443186Y1 (ko) 다리부의 폭 조절이 가능한 전동식 팔레트 스태커
CN213384378U (zh) 一种具有减震功能的推车托盘
CN211035064U (zh) 一种承载空间可变换的升降平台
US2974929A (en) Panel lifting device
US2147076A (en) Truck
US1701134A (en) Lifting jack
US1549029A (en) Industrial truck