US2402579A - Load lifter - Google Patents

Load lifter Download PDF

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Publication number
US2402579A
US2402579A US595505A US59550545A US2402579A US 2402579 A US2402579 A US 2402579A US 595505 A US595505 A US 595505A US 59550545 A US59550545 A US 59550545A US 2402579 A US2402579 A US 2402579A
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United States
Prior art keywords
carriage
load
linkages
bell
crank
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
US595505A
Inventor
William A Ross
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WEAVER Manufacturing Co
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WEAVER Manufacturing 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.)
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Publication date
Application filed by WEAVER Manufacturing Co filed Critical WEAVER Manufacturing Co
Priority to US595505A priority Critical patent/US2402579A/en
Application granted granted Critical
Publication of US2402579A publication Critical patent/US2402579A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66FHOISTING, 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
    • B66F7/00Lifting frames, e.g. for lifting vehicles; Platform lifts
    • B66F7/06Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement
    • B66F7/08Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement hydraulically or pneumatically operated
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66FHOISTING, 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
    • B66F3/00Devices, e.g. jacks, adapted for uninterrupted lifting of loads
    • B66F3/22Lazy-tongs mechanisms
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66FHOISTING, 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
    • B66F7/00Lifting frames, e.g. for lifting vehicles; Platform lifts
    • B66F7/06Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement
    • B66F7/0625Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement with wheels for moving around the floor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66FHOISTING, 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
    • B66F7/00Lifting frames, e.g. for lifting vehicles; Platform lifts
    • B66F7/06Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement
    • B66F7/065Scissor linkages, i.e. X-configuration
    • B66F7/0666Multiple scissor linkages vertically arranged

Description

June 25, 1946. w. A. ROSS 2,402,579
LOAD .LIFTER Filed May 24, 1945 5 Sheets-Sheet l 7 June 25, 1946. w. A. Ross 2,402,579
LOAD LIFTER Filed May 24, 1945 -3 Sheets-Sheet 2 IN VEN TOR.
Patented June 25, 1946 UNITED STATES PATENT OFFICE LOAD LIFTER William A. Boss, Springfield, Ill., assignor to Weaver Manufacturing Company, Springfield, 111., a corporation of Illinois Application May 24, 1945, Serial No. 595,505
2 Claims. 1
Substantial advancement in the structural and functional properties of load elevating and loading appliances constitute the subject matter of the present invention whereby to afiord mechanisms of this general character with constructional features which permit the devices to operate to substantially better advantage than heretofore.
Among the various aims of the invention may be mentioned the provision of an apparatus of this type which avoids complexity of construction, which may be manufactured at comparatively small cost, and which functions advantagously and efliciently.
To enable those skilled in this art to understand the invention and the advantages which accrue from its employment a present preferred embodiment of the invention has been illustrated in the accompanying drawings forming a part of this specification and to which reference should be had in connection with the following detailed description, and, for simplicity, like reference characters have been employed to designate the same parts throughout the several views of the drawings.
In the drawings:
Figure 1 shows the appliance in elevated relation in perspective;
Figure 2 portrays the apparatus in perspective in its lowered condition;
Figure 3 is a side elevation of the mechanism in partially raised condition;
Figure 4 is a similar view of the structure in further depressed relation;
Figure 5 is a plan of the construction with its supporting carriage or saddle, denoted as a whole by the reference numeral l5, and which may be of any suitable size, shape and form, depending upon the type of load to be elevated, includes twin, transversely-registered, pantograph-linkages each having, in the present instance, three pairs of channel-bar links l6, l6, l1, l1 and l8, [8, each hinged at its middle at l8 to the center of its companion link of the pair and also hinged 2 to ends of other links at 2|, all in the well known pantograph arrangement.
One I it of each pair of upper links at its top is hinged at a fixed point 22 to the corresponding side of the forward portion of carriage IS, the upper end of its companion link 18 being hinged at 23 to a frame 24 slidable lengthwise in the sides of the longitudinal channel-bars constituting parts of the carriage I 5, whereby such end of each of the specified top links H8, H8 may travel lengthwise of the carriage during its up and down movements.
The lower end of each of the two links it is hinged at 25 to the corresponding chassis, side channel-bar and the lowermost end of each of the companion links I I6 is provided with a roller at 26 adapted to travel forwardly and rearwardly in a channel guide-bar 21 fixed to the outer face of the answering side-bar of the chassisframe.
To actuate these two, complementary, transversely-registered pantograph-linkages simultaneously, the following means is provided.
An oil-pump 28, operated by rocking handle l4, feeds oil under pressure into a horizontal cylinder 29 hinged on the chassis at 30, the piston-rod 3| of the piston (not shown) in the cylinder being rockingly connected at 32 to the short arm of a bell-crank 33 fulcrumed at 34 on a stationary bracliet 35 mounted on the chassis. the longer arm of the bell-crank being joined by a short link 36 to the pivotal connections IS. IS of the two pairs of links l6 and I It as by a crossrod or shaft I31 at that point.
Obviously, as the oil under pressure enters cylinder 29, its piston-rod 3| rocks the bellcrank 33 around its fixed axis 34, thus swinging the longer arm of the bell-crank up and forcing both pantograph-linkages and their common carriage up by the force applied through the connecting link 36.
It will be clear that when the operative parts are collapsed, as portrayed in Figure 7, the cylinder and its piston-rod are not in such position to apply its power to best advantage and it is therefore desirable to employ a booster means to assist such main operating mechanism during the first or initial portion of its action, that is to say, until its parts have changed their .position to render them more efflcient and effective.
Accordingly, the following additional or supplemental power-operating medium is employed during the introductory or inaugural action of the main power means.
As presented, perhaps most clearly in Figure 6, a smaller auxiliary or booster cylinder 21 is hinged or pivoted at 38 on the long arm of the bell-crank, the turning of such cylinder about the axis 38 being limited or restricted by the adjacent mechanical parts, the piston-rod 39 of the piston in the cylinder having a rounded head or end 41 adapted to coact with a complementary, concave, .socket member 42 welded or otherwise fixedly secured to the two links l8, l8 and adapted to rest on the head 4| during the first portion of the upward action.
The lower portion of the interior of the smaller cylinder 31 is connected by a flexible conduit 43 joined to the interior of cylinder 29 so that the oil under pressure operates the pistons in both cylinders at the same time.
Assuming that the appliance is in the completely folded, lowermost condition, as depicted in Figure 2, and that it is desired to raise a load resting in the seat or carriage IS, the operator by manually rocking or oscillating handle [4 simultaneously pumps oil under pressure into the main and booster cylinders 29 and 31, respectively, thereby initiating the elevation of the carriage and its load through the piston-rod 3|, bell-crank 33, link 36 and the pair of pantograph-linkages, this action being aided and facilitated by the upward pressure ofpiston-rod 39 acting on the same linkages through the coacting part .39 and 42, the cylinder, piston and pistonrod rocking somewhatas they ascend by the conjoint-action of .part 42 with the end of the piston-rod.
By the time the main operating means reaches a condition and position of cooperating elements to more eillciently and forcefully perform its lifting action, the link l8 will have risen sufllciently to raise the cap 42 away from the piston-rod l9 and the latter will remain inactive because it has reached its limit of extension.
when the carriage is to descend the usual 11:-
lease-valve (not shown) of the pump discharges the machine is equipped with a pair of outrlgsers 5|, 5| hinged to the opposite sides of the chassis extended, active positions or folded back against the chassis in inoperative positions.
The arms of these Outriggers have adjustable Jack-screws SI, 53 at their free ends with groundengaging discs or feet 54, 54.
Manifestly, by turning the jack-screw cranks 55, 55 and thereby setting the height of these arms the appliance may be stabilized or it may be tilted, if desired, to either side if necessary when in raised position.
As the appliance has been used as a bomb loading truck mounted on pneumatictires, the out-. riggers prevent swaying and allow lateral mo tion, as referred to.
The appliance, as described above, is not nec-. essarily limited and restricted to the precis features of structure since these may be modified within reasonable limits without digression from the nature and principle of the invention, as de fined in the appended claims, and without loss ofl any of the material benefits or advantages accruing from the employment of the invention in physical form.
I claim:
1. In a load-lifting apparatus including a base,
a load-lifting carriage, a pair of transverselyregistered carriage-operating pantograph-linkages between said base and carriage and means to actuate said linkages simultaneously, the novel improvement of said actuating-means including a bell-crank hinged on said base, main hydraulic operating-means connected to the shorter arm of the bell-crank, a link connecting the longer arm of said bell-crank t0 the lower pairs of links of the two linkages, and a booster hydraulic means mounted on the longer arm of said bell-crank and adapted to cooperate with said linkages to assist in raising them dining the initial portion only of the lifting operation of said main hydraulic means.
2. The novel improvement set forth in claim 1, I including the additional novel improvement that said booster hydraulic means is hinged on the longer arm of said bell-crank and said linkages have means cooperating with said booster hydraulic means and rocking the latter dining at least a portion of the active operation thereof.
wnnaua. Ross.
US595505A 1945-05-24 1945-05-24 Load lifter Expired - Lifetime US2402579A (en)

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Cited By (45)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2466155A (en) * 1946-03-30 1949-04-05 Airquipment Company Adjustable workstand
US2468230A (en) * 1946-04-24 1949-04-26 Howard A Pollard Elevator and support for ceiling and wall board
US2471901A (en) * 1945-04-25 1949-05-31 Weaver Mfg Co Load-lifting appliance
US2503180A (en) * 1947-06-21 1950-04-04 Elmer A Wagner Mobile lift
US2625443A (en) * 1949-09-27 1953-01-13 Sensenbaugh Andrew Elevating scaffold
US2639051A (en) * 1948-04-16 1953-05-19 Julian B Thomas Pallet stack unloader
US2713402A (en) * 1949-07-15 1955-07-19 Mccabe Powers Auto Body Co Tower vehicle leveling device
US2788193A (en) * 1953-04-16 1957-04-09 Pigeon Hole Parking Inc Vehicle dolly
US2937003A (en) * 1956-10-12 1960-05-17 John L Croll Hydraulic lift
DE1082023B (en) * 1958-12-06 1960-05-19 Ingo Trepel Lifting table with Nuremberg scissors
US2948363A (en) * 1955-08-11 1960-08-09 Grand Specialties Company Telescoping elevators
DE1089143B (en) * 1956-08-22 1960-09-15 Ingo Trepel Lifting table for attaching plate-shaped workpieces to processing machines
DE1100906B (en) * 1958-06-14 1961-03-02 Wumag Niederrhein Pallet truck with a loading platform
US2998106A (en) * 1955-06-30 1961-08-29 Atag Trust Mobile elevating and erecting device for masts assembled from separate sections
US3016973A (en) * 1958-12-29 1962-01-16 Clark Equipment Co Lift truck
US3053351A (en) * 1960-02-19 1962-09-11 Junius H Fulcher Structural device
DE1201526B (en) * 1962-03-26 1965-09-23 Edward John Ratcliff Lifting device with a platform that can be raised and lowered by hydraulically operated Nuremberg scissors
US3289684A (en) * 1964-11-20 1966-12-06 Lyall L Lowe Automobile sleeping unit
DE1243094B (en) * 1962-04-06 1967-06-22 Streuber & Lohmann Eisenwerk Lift and tilt device
US3516512A (en) * 1968-03-06 1970-06-23 Eisenbau Karl Ladwig Bsb Mobile scaffold
US3596735A (en) * 1969-10-30 1971-08-03 Howard H Denier Portable elevator working and load-lifting platform
US3700070A (en) * 1971-07-21 1972-10-24 Concrete Formwork Eng Pty Ltd Scissors-type linkage
USRE28455E (en) * 1969-10-30 1975-07-01 Portable elevator working and load-lifting platform
US3923320A (en) * 1974-03-05 1975-12-02 Andre Favreau Wagon for transporting an erected scaffold
FR2294978A1 (en) * 1974-12-20 1976-07-16 Breant Paul Mobile platform lifting mechanism - has platform on scissor links raised by hand or power actuator from vehicle chassis
US3982718A (en) * 1975-07-31 1976-09-28 Dentsply Research & Development Corporation Operatory chair operating mechanism
US3983960A (en) * 1973-10-15 1976-10-05 Robert Staines Scissors lift
US4131181A (en) * 1977-05-16 1978-12-26 Vermette Howard H Portable lift
US4288195A (en) * 1979-06-07 1981-09-08 Southworth, Incorporated Roll-away wheel truck and lift table assembly
US4457403A (en) * 1982-09-16 1984-07-03 Up-Right, Inc. Self-propelled elevating work platform
US4890692A (en) * 1988-12-06 1990-01-02 Jlg Industries, Inc. Platform elevating apparatus
US5113972A (en) * 1988-08-10 1992-05-19 Haak Martin Sr Scissor-type lifting device, particularly for a work platform
EP0640554A1 (en) * 1993-08-31 1995-03-01 Mayville Engineering Company, Inc. A single beam aerial work platform
EP0854110A1 (en) * 1997-01-14 1998-07-22 Dirk Begemann Scissors lift system for working platforms
US6460653B1 (en) * 2001-03-15 2002-10-08 Ronald M. Hardy Combined trailer and hunting stand operable between elevated and collapsed positions
US6651775B2 (en) * 2000-07-31 2003-11-25 Frederick N. Bassett, Jr. Low level scaffold with ballscrew drive
US20080128215A1 (en) * 2006-05-24 2008-06-05 Gershon Nowitz Portable Scissor Lift
US20130099642A1 (en) * 2011-09-28 2013-04-25 Scott D. Wehner Collapsible Shelving Units and Collapsible Enclosures
US8556311B1 (en) 2013-02-07 2013-10-15 Marcos V. Lucero Truck cab and bed lift tool
USD707473S1 (en) 2012-09-28 2014-06-24 Worldwide Creations, LLC Collapsible enclosure
USD707472S1 (en) 2012-09-28 2014-06-24 Worldwide Creations, LLC Collapsible enclosure
USD722795S1 (en) 2012-09-28 2015-02-24 Worldwide Creations, LLC Collapsible enclosure
US9296596B2 (en) 2012-10-15 2016-03-29 Cameron Lanning Cormack Hybrid wedge jack/scissor lift lifting apparatus and method of operation thereof
US20170283229A1 (en) * 2016-03-29 2017-10-05 Dongfeng Shi Scissor-boom lift
US10358330B2 (en) * 2015-04-18 2019-07-23 Haulotte Group Scissor arm assembly for a scissor lifting mechanism of an aerial work platform

Cited By (50)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2471901A (en) * 1945-04-25 1949-05-31 Weaver Mfg Co Load-lifting appliance
US2466155A (en) * 1946-03-30 1949-04-05 Airquipment Company Adjustable workstand
US2468230A (en) * 1946-04-24 1949-04-26 Howard A Pollard Elevator and support for ceiling and wall board
US2503180A (en) * 1947-06-21 1950-04-04 Elmer A Wagner Mobile lift
US2639051A (en) * 1948-04-16 1953-05-19 Julian B Thomas Pallet stack unloader
US2713402A (en) * 1949-07-15 1955-07-19 Mccabe Powers Auto Body Co Tower vehicle leveling device
US2625443A (en) * 1949-09-27 1953-01-13 Sensenbaugh Andrew Elevating scaffold
US2788193A (en) * 1953-04-16 1957-04-09 Pigeon Hole Parking Inc Vehicle dolly
US2998106A (en) * 1955-06-30 1961-08-29 Atag Trust Mobile elevating and erecting device for masts assembled from separate sections
US2948363A (en) * 1955-08-11 1960-08-09 Grand Specialties Company Telescoping elevators
DE1089143B (en) * 1956-08-22 1960-09-15 Ingo Trepel Lifting table for attaching plate-shaped workpieces to processing machines
US2937003A (en) * 1956-10-12 1960-05-17 John L Croll Hydraulic lift
DE1100906B (en) * 1958-06-14 1961-03-02 Wumag Niederrhein Pallet truck with a loading platform
DE1082023B (en) * 1958-12-06 1960-05-19 Ingo Trepel Lifting table with Nuremberg scissors
US3016973A (en) * 1958-12-29 1962-01-16 Clark Equipment Co Lift truck
US3053351A (en) * 1960-02-19 1962-09-11 Junius H Fulcher Structural device
DE1201526B (en) * 1962-03-26 1965-09-23 Edward John Ratcliff Lifting device with a platform that can be raised and lowered by hydraulically operated Nuremberg scissors
DE1243094B (en) * 1962-04-06 1967-06-22 Streuber & Lohmann Eisenwerk Lift and tilt device
US3289684A (en) * 1964-11-20 1966-12-06 Lyall L Lowe Automobile sleeping unit
US3516512A (en) * 1968-03-06 1970-06-23 Eisenbau Karl Ladwig Bsb Mobile scaffold
US3596735A (en) * 1969-10-30 1971-08-03 Howard H Denier Portable elevator working and load-lifting platform
USRE28455E (en) * 1969-10-30 1975-07-01 Portable elevator working and load-lifting platform
US3700070A (en) * 1971-07-21 1972-10-24 Concrete Formwork Eng Pty Ltd Scissors-type linkage
US3983960A (en) * 1973-10-15 1976-10-05 Robert Staines Scissors lift
US3923320A (en) * 1974-03-05 1975-12-02 Andre Favreau Wagon for transporting an erected scaffold
FR2294978A1 (en) * 1974-12-20 1976-07-16 Breant Paul Mobile platform lifting mechanism - has platform on scissor links raised by hand or power actuator from vehicle chassis
US3982718A (en) * 1975-07-31 1976-09-28 Dentsply Research & Development Corporation Operatory chair operating mechanism
US4131181A (en) * 1977-05-16 1978-12-26 Vermette Howard H Portable lift
US4288195A (en) * 1979-06-07 1981-09-08 Southworth, Incorporated Roll-away wheel truck and lift table assembly
US4457403A (en) * 1982-09-16 1984-07-03 Up-Right, Inc. Self-propelled elevating work platform
US5113972A (en) * 1988-08-10 1992-05-19 Haak Martin Sr Scissor-type lifting device, particularly for a work platform
US4890692A (en) * 1988-12-06 1990-01-02 Jlg Industries, Inc. Platform elevating apparatus
EP0640554A1 (en) * 1993-08-31 1995-03-01 Mayville Engineering Company, Inc. A single beam aerial work platform
EP0854110A1 (en) * 1997-01-14 1998-07-22 Dirk Begemann Scissors lift system for working platforms
US6651775B2 (en) * 2000-07-31 2003-11-25 Frederick N. Bassett, Jr. Low level scaffold with ballscrew drive
US6460653B1 (en) * 2001-03-15 2002-10-08 Ronald M. Hardy Combined trailer and hunting stand operable between elevated and collapsed positions
US20080128215A1 (en) * 2006-05-24 2008-06-05 Gershon Nowitz Portable Scissor Lift
USD732861S1 (en) 2011-09-28 2015-06-30 Worldwide Creations, LLC Collapsible shelving unit
US9241564B2 (en) 2011-09-28 2016-01-26 Worldwide Creations, LLC Collapsible shelving units and collapsible enclosures
USD746617S1 (en) 2011-09-28 2016-01-05 Worldwide Creations, LLC Collapsible shelving unit
US9089211B2 (en) * 2011-09-28 2015-07-28 Worldwide Creations, LLC Collapsible shelving units and collapsible enclosures
US20130099642A1 (en) * 2011-09-28 2013-04-25 Scott D. Wehner Collapsible Shelving Units and Collapsible Enclosures
USD722795S1 (en) 2012-09-28 2015-02-24 Worldwide Creations, LLC Collapsible enclosure
USD707472S1 (en) 2012-09-28 2014-06-24 Worldwide Creations, LLC Collapsible enclosure
USD707473S1 (en) 2012-09-28 2014-06-24 Worldwide Creations, LLC Collapsible enclosure
US9296596B2 (en) 2012-10-15 2016-03-29 Cameron Lanning Cormack Hybrid wedge jack/scissor lift lifting apparatus and method of operation thereof
US8556311B1 (en) 2013-02-07 2013-10-15 Marcos V. Lucero Truck cab and bed lift tool
US10358330B2 (en) * 2015-04-18 2019-07-23 Haulotte Group Scissor arm assembly for a scissor lifting mechanism of an aerial work platform
US20170283229A1 (en) * 2016-03-29 2017-10-05 Dongfeng Shi Scissor-boom lift
US10322920B2 (en) * 2016-03-29 2019-06-18 Dongfeng Shi Scissor-boom lift

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