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Publication numberUS2645372 A
Publication typeGrant
Publication dateJul 14, 1953
Filing dateJun 12, 1948
Priority dateJun 12, 1948
Publication numberUS 2645372 A, US 2645372A, US-A-2645372, US2645372 A, US2645372A
InventorsCharles Broersma J
Original AssigneeClark Equipment Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Material handling apparatus
US 2645372 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

14, 1953v J. c BROERSMA 2,645,372


y 1953 J. c. BROERSMA 5, 7

MATERIAL HANDLING APPARATUS Filed June 12, 1948 3 She ets-Sheet 2 FIG. 2


July 14, 1953 J. c. BRoERsMA uamm. HANDLING APPARATUS 3 Sheets-Sheet 3 3119a Jun 12. 4948 FIG. 5


V Patented July 14, 1953 2,645,372 I M ATER I AL HANDLING APRARATUS -J. Charles Broersnia, Kalamazoo, Mich., assignor i to l Clark Equipment Company, Buchanan',

. .Mich a:corporation of Michigan l ma aria Jae 12, 1948, Serial mam 2 Claims. (Cl. 214-4552) This invention relateagenerallyg to industrial trucks and it has particular relation to attach ments for such trucks for gripping and handling various types of loads.

Among the objects of this inventionare: To provide for gripping a load by clamp means at tached to and movable "with the elevating mechanism of anindustrialtruck and for'rotating the load gripped by the clamp means; to employ remotely operable power means for op erating individually the clamp means f and the load rotating means; to employ a pair of clamp arms'rockably mounted-intermediate their ends for gripping the load between their outer ends and for equalizing the movement of the clamp arms as caused by a hydraulic operating mechanism connected between the innerends of the clamp arms; to clamp cylindrical loads; and to accommodate cylindrical loads of different diameters. V

Other objects of this invention will, in part, be obvious and in part appear hereinafter.

This invention is disclosed in the embodiments thereof shown in the accompanying drawings, and it comprises the features of construction, combination of elements and arrangement of parts which will be exemplified in the constructions hereinatfer set forth and-the scope of the application of which will be indicated in the appended claims. 7

For a more complete understanding of the nature and scope of this invention, reference can be had to the following detailed description, taken together with the accompanying drawings, in which:

Figure 1 is a perspective view of an industrial truck of conventional design having a carriage arranged to be elevated by the truck elevating mechanism, the carriage being arranged to pick up a cylindrical load, such as an oil drum, and to rotate it about a horizontal axis;

Figure 2 is perspective view illustrating how the cylindrical load canbe picked up and rotated from a horizontal to a vertical position;

Figure 3 is a perspective view illustrating how the present invention can be employed for rotating a cylindrical load so as to dump the contents of the same;

.Figure 4 is a view, in front elevation, of the rotatably mounted clamp mechanism shown in the preceding figures;

Figure 5 is a top plan view of the hydraulic operating mechanism employed for moving the clamp arms into and out of'engagement with the cylindrical load. I

Referring now particularly to Figure 1 of the drawings, it will be noted that the reference character [0 designates, generally, an industrial truck of conventional construction which hasa 'mast I I at its front end on which a cross head I2 is mounted for movement up and down. It will be understood that the cross head 12 is movable under the control of the operator who rides on the truck It). At its ends the'cross head l2 has sprocket wheels l3 over which chains i l are trained. One end of each of the chains 14 is anchored to the mast H while the other ends are attached to a load supporting carriage, shown generally at l5, which is guided for movement on the mast II and is arranged to move up and down therealong in accordance with corresponding movement of the cross head 12.

The load supporting carriage I5 is preferably rigidly constructed so that it will be capable of handling without distortion the load that is applied thereto. It may comprise a pair of cross members I6 to which a plate I! is attached as by welding. Near the upper edge of the plate I! a pair of L-shaped brackets 20 are welded. Bolts 2| extending through theprojecting arms of the bracket 20 serve to hold arms 22 and 23 securely thereto. The arms 22 and 23 extend forwardly of the carriage 15 in parallel spaced relation as shown and together constitute an extension therefrom.

At the forward ends of the arms 22 and 23 a supportor shaft 24 is journaled at 25 and 26. The support or shaft 24 may be formed from a bar of steel having a rectangular cross section and it is rotatably mounted as indicated at 25 and-2G so that it rotates about a horizontal axis which is transverse to the arms 22 and 23 which together'constitute the extension above referred to.

In order'to rotate the support 24 about its horizontal axis itis provided with a gear 21 at the right hand end, as viewed in Figure 4, and a rack 28 is provided for cooperating therewith. As shown in'Figure 1,the rack 23 is arranged to be moved for rotating the gear 2! by a power mechanism in the form of a hydraulic operator which is indicated, generally, at 29. The hydraulic operator 29 is of conventional construction and includes a cylinder 30 which is fastened at one end to a bracket 3| that extends from the arm 23. A pair of hose 32 are connected to opposite ends of the cylinder 30 for applying pressure to opposite sides of a piston which reciprocates Within the cylinder 30 for effecting corresponding movement of the rack 28. An idler operator that is indicated generally at 40 and which may be a duplicate of the hydraulic op-,

erator 29. The hydraulic operator 40 includes a cylinder 42 and a connecting rod 43, the former being connected tothe inner end 44 of the arm 38 and the latter being connected to the inner end 45 of the arm 39. A pair of hose 46 and 41 are provided for supplying hydraulic fluid under pressure to opposite ends of the cylinder 42. It

.of the support 24 011 the arm 22. Fittings 5| and 52 serve to interconnect the passageways 49 and 48, respectively, to a pair of hose 53 through which the hydraulic fluid is supplied from a suitable source under pressure. j

The outer ends 55 and 51 of the clamp arms 38 and 39 have arcuate clamp members 58 and 59, respectively, attached theretofor engaging a cylindrical load 69 which, as shown in Figures 1, 2 and 3 of the drawings may be in the form of a drum containing a liquid such as oil. It will be understood that other cylindrical loads can be transportedwith the industrial truck attachment disclosed herein.

Since it is desirable to grip securely loads having different diameters using the same arcuate clamp members 58 and 59, an adjusting plate 6| may be provided for accommodating the various diameters of the loads. The adjusting plate 6| can be secured by bolts 62 to the support 24. The adjusting plate 61 has bolt holes 63 therein, as shown, to permit its being positioned at various locations with respect to the support 24 depending upon the diameter of the load to be lifted. v

It will be observed that the hydraulic operator 49 is supported entirely by the inner ends 44 and 45 of the clamp arms 38 and 39. In order to insure that equal movement of the clamp arms 38 and 39 takes place, a rigid link 55 is connected at 5B and 61 to the outer end 56 of the clamp arm 38 and to the inner end 45 of the clamp arm 39. The points of connection of the rigid link 65 tothe clamp arms 38 and 39 are equidistant from theirpivot points 3,6 and 31. This construction insures that the clamp arms 38 and 39 move through the same extent on expansion or contraction of hydraulic operator 49.

Referring again to Figure 1 it will be observed that the pairs of hose 32 and 53 extend upwardly from the carriage l5 and over pulleys 68 that are rotatably mounted on thecross head [2 and move'up' and down therewith. It will be understood that the hose 32 and 53 are connected through suitable valves under the control of the operator to a source of hydraulic pressure.

In operation, the industrialtruck II] is driven to the location of the load 69 with the arcuate clamp members 58 and 59 in the open position. Assuming that a drum is to be picked up as illustrated in Figure 1, the truck I0 is maneuvered to such position that the arcuate clamp members 58 and 59 are on opposite sides thereof. The carriage I5 is lowered to the properposition by the operator on the truck I 9. Thereafter he energizes the hydraulic operator 40 to move the arcuate clamp members 58 and 59 into gripping engagement with the sides of the drum. Whenthis has been accomplished the operator causes thecarriage I5 to be raised along the mast ll. truck 10 then is driven to the desired location.

If it is desired to swing the drum from the horizontal to the vertical position as shown in Figure 2, the operator suitably energizes the hydraulic operator 29 to swing the-support 24 and therewith the drum about the horizontal axis to the position shown.

As shown in Figure 3 the contents of the drum can be dumped. For this purpose the hydraulic operator 29 is energized so as to swing the drum to the position here shown. It will be noted that the arms .22 and '23 are spaced sufficiently far apart on the carriage 15 'to permit the drum.

to be swung between them.

The foregoing described steps in handling the drum are merely illustrative of the manner in which the present invention can be'employed. Obviously it has other purposes. For example, it can be employed for stacking the drums one about the other or for unstacking the drums as may be desired.

As shown in Figures 1 and 2 of thedrawings, the arms 22 and. 23 vare'provided with bolt holes 21', for receiving the bolts 2| to hold the arms 22 and 23 in alternate positions on the brackets 29. This permits the support 24 to be carried closer to the carriage l5 where heavier loads can be picked up. However, the load cannot be dumped, as shown in Figure 3, but can be carried in either the horizontal position as shown in Figure 1 or in the vertical position as shown in Figure 2.

Since certain other changes-can be .made in the foregoing constructions and different embodiments of the invention can be made without departing from thespirit and scopethereof, it is intended that all'matter shown in the accompanying drawings and described hereinbefore shall be interpreted as illustrative and not in a limiting sense.

What is claimed as new is:

1. An attachment foran industrial truck having a vertical mast and elevating means thereon comprising, in combination, a'carriage adapted for mounting on said mast and to-bemoved up and down thereon by said elevating means, an extension projecting forwardly of said carriage, a shaft rotatable about a; transverse axis on said extension, a pair of clamp arms rockably mounted intermediate their ends on said shaft, the outer ends of said clamp arms being arcuate for engaging and gripping a cylindrical load therebetween, a power mechanism operatively connectedbetween the inner ends of said clamp arms for moving said arcuate outer ends thereof into and out of. engagement withthe load, and a power mechanism carried by said extension and operatively connected to said shaft for rotating it and theload gripped by said arcuate outer ends of said clam-p arms about said transverse axis.

1 2. Anattachment for an industrial truck having a vertical mast and elevating means thereon comprising, in combination, a carriage adapted for mounting onsaid mast and to be moved up and down thereonby said elevating means, an extension projecting forwar l of said carriage,

This picks up the drum. The 7 a support rotatable about a transverse axis on said extension, a pair of clamp arms rockably mounted intermediate their ends on said support,

the outer ends of said clamp arms being arcuate inner ends of said clamp arms for moving said arcuate outer ends thereof into and out of engagement with the load, and a power mechanism carried by said extension and operatively con-' nected to said support for rotating it and the load gripped by said arcuate outer ends of said clamp arms about said transverse axis. 1


References Cited in the file of this patent UNITED STATES PATENTS Name Date Barlow July 13, 1920 Number 7 Number Number Name Date Moone Dec. 27, 1921 Eidmann Apr. 15, 1924 Wehr May 26, 1931 Abbe Sept. 27, 1932 Remde Oct. 25, 1932 Allard June 12, 1934 Schwab June 11, 1935 Stevens Dec. 17, 1946 Stokes Dec. 31, 1946 Guerin Dec. 28,1948 Breslav'n; May 10, 1949 Ferrario et al. Feb. 14, 1950 .Vogel et a1. May 23, .1950 Lehmann Sept. 12, 1950 FOREIGN PATENTS Country Date France Jan. 26, 1931 Australia -11. Mar. 21, 1941

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1346160 *Mar 14, 1919Jul 13, 1920Samuel E BarlowPower-operated tongs
US1401429 *May 24, 1919Dec 27, 1921Carey Philip Mfg CoApparatus for handling rolls of roofing, barrels, boxes, and similar articles
US1490664 *Nov 26, 1920Apr 15, 1924Edward N WhiteElevating truck
US1807360 *Mar 17, 1928May 26, 1931Cleveland Crane EngPaper roll handling mechanism
US1873994 *Dec 15, 1923Aug 30, 1932James D MooreInternal combustion engine
US1884861 *Oct 14, 1929Oct 25, 1932Edward H RemdeIndustrial truck
US1962700 *Sep 1, 1931Jun 12, 1934Benoto SaGrab
US2004349 *Jun 13, 1933Jun 11, 1935Hazel Atlas Glass CoGlass transfer apparatus
US2412845 *Jun 9, 1945Dec 17, 1946Arthur M StevensGrapple fork
US2413661 *Feb 28, 1945Dec 31, 1946Calvin Stokes CharlesMaterial handling construction
US2457366 *Aug 29, 1946Dec 28, 1948Towmotor CorpIndustrial truck
US2469812 *Dec 22, 1945May 10, 1949Jack BreslavAttachment for industrial trucks
US2497118 *May 20, 1947Feb 14, 1950Ferrario John JApparatus for lifting cylindrical objects
US2509023 *Jul 5, 1947May 23, 1950John F HartmanApparatus for handling unit loads
US2522128 *May 2, 1946Sep 12, 1950Baker Raulang CoIndustrial truck
AU112788B * Title not available
FR702629A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2755949 *Jan 14, 1952Jul 24, 1956Baker Raulang CoLoad handling equipment for industrial trucks
US2756883 *Jun 17, 1953Jul 31, 1956Schreck Irvin FVat lifting and dumping truck
US2795347 *Mar 25, 1953Jun 11, 1957Baker Raulang CoLoad handling attachment for industrial trucks
US2800236 *Jun 30, 1953Jul 23, 1957Baker Raulang CoSelf-unloading industrial truck
US2812089 *May 27, 1954Nov 5, 1957Yale & Towne Mfg CoRotating clamp attachment for lift trucks
US2819113 *Oct 8, 1953Jan 7, 1958Shell DevClamps with composite flexible grab arms
US2821317 *Feb 6, 1956Jan 28, 1958Locke Burton HMaterials clamping devices for lift trucks
US2821377 *Apr 4, 1956Jan 28, 1958Pennsylvania Engineering CorpVessel charging apparatus
US2822163 *May 11, 1955Feb 4, 1958Pennsylvania Engineering CorpCharging apparatus
US2865517 *Oct 26, 1954Dec 23, 1958Wm Hollingsworth Machine Co InInverter for printed sheets
US2972427 *Jun 3, 1958Feb 21, 1961Yale & Towne Mfg CoCoil handling truck
US3064839 *Jan 14, 1959Nov 20, 1962Erwin BaasLoader for vehicles, tractors, or the like
US3206052 *Nov 1, 1962Sep 14, 1965Kennedy Harry FAttachment for industrial lift truck
US3363929 *Oct 21, 1965Jan 16, 1968Nelson MarvinMaterial handling assembly
US3968859 *Dec 23, 1974Jul 13, 1976Allis-Chalmers CorporationMultiple hose guide arrangement for a lift truck
US3971485 *Nov 26, 1974Jul 27, 1976Thomas HoppeyForklift attachment
US4084706 *Apr 12, 1976Apr 18, 1978Clifford E. BadgleyHoisting dolly
US4597703 *Jun 11, 1984Jul 1, 1986Agrimac Di Bartolini MauroBale handling and hay distributing apparatus
US4951990 *Oct 3, 1989Aug 28, 1990The United States Of America As Represented By The Secretary Of The NavyFifty five gallon drum handling apparatus
US5009565 *Nov 20, 1989Apr 23, 1991Liberty Diversified Industries, Inc.Fork lift attachment
US5281076 *May 24, 1993Jan 25, 1994Liberty Diversified IndustriesForklift attachment
US5496147 *Aug 12, 1994Mar 5, 1996Barrel Racking Systems, Inc.Barrel handling device
US7192236 *Feb 29, 2000Mar 20, 2007Westfalia-Wst-Systemtechnik Gmbh & Co. KgShelf stacking machine
US8573921 *May 26, 2009Nov 5, 2013Mhe Technologies, Inc.Method and a device for lifting and rotating a massive container
US9290367 *Jun 17, 2013Mar 22, 2016Cascade CorporationTissue roll-handling clamp
US20090232634 *May 26, 2009Sep 17, 2009Waisanen Steven KMethod and a device for lifting and rotating a massive container
US20110156332 *Sep 30, 2010Jun 30, 2011Murata Machinery, Ltd.Transfer apparatus and transfer method
US20140369799 *Jun 17, 2013Dec 18, 2014Cascade CorporationTissue roll-handling clamp
CN102069501A *Jan 28, 2011May 25, 2011李 杰Manipulator paw structure and manipulator
U.S. Classification414/620
International ClassificationB66F9/19, B66F9/12
Cooperative ClassificationB66F9/19
European ClassificationB66F9/19