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Publication numberUS2378570 A
Publication typeGrant
Publication dateJun 19, 1945
Filing dateMay 6, 1943
Priority dateMay 6, 1943
Publication numberUS 2378570 A, US 2378570A, US-A-2378570, US2378570 A, US2378570A
InventorsMitchell Donald H
Original AssigneeWestern Electric Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Grapple
US 2378570 A
Abstract  available in
Images(3)
Previous page
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Claims  available in
Description  (OCR text may contain errors)

June 19, 1945.

D. H. MITCHELL GRAPPLE Filed May 6, 1943 3 Sheets-Sheet l INVENTOR v 0.11. mrcmsu.

A TTOR/VEY June 19, 1945. D. H. MITCHELL 2,378,570

GRAPPLE Filed May 6, 1945 .3 Sheets-Sheet 2 -J Y l fi n j 0. H. MITCHELL Br 30 1 fimwi A T TORNEV June 19, 1945. rrc E 2,378,570

GRAPPLE Filed May 6, 1945 3 Sheets-Sheet 3 INVE'N TOR 0./-/. u/ rcusu,

A TTOR/VEK Patented June 19, 1945 GRAPPLE Donald H. Mitchell, Cranford, N, 1., assign" to Western Electric Company, Incorporated, New York, N. Y., a corporation of New York Application May 6, 1943, Serial No. 485,865

6 Claims. (Cl. 294-110) This invention relates to grapples, and more particularly those adapted for transporting heavy cylindrical articles.

Heavy articles without the provision of trunnions or other projections suitable for engagement by hoisting means are difficult to transport.

when the grapple or engaging means must depend entirely upon gripping contact with the outer walls of such articles. Furthermore, this difficulty is enhanced by the increase in weight of such articles and the smoothness of their outer surfaces.

An object of the invention is to provide a grapple which is simple in structure yet highly eflicient for gripping and transporting articles which are free of engageable projections.

With this and other objects in view, the invention comprises a grapple having spaced pairs of article engaging elements adapted to be moved into and held in open position and automatically closed when disposed about an article, the supporting means for the elements assuring positive holding engagement of the element with the articles.

Other objects and advantages will be apparent from the following detailed description when considered in conjunction with the accompanying drawings, wherein Fig. 1 is a front elevational view of the grapple shown locked in open position;

Fig. 2 is a side elevational view of the grapple shown in closed position;

Fig. 3 is a front elevational view of the grapple shown in closed position; I

Fig. 4 is a fragmentary detail sectional view taken substantially along the line 44 of Fig. 3:

Fig. 5 is a fragmentary detail view taken along the line 5-5 of Fig. 3, and

Fig. 6 is a fragmentary sectional view taken along the line 6-8 of Fi 3.

Referring now to the drawings, it will be observed that a support or spreader bar l0, apertured at H for receiving a hook |2 of a hoist or the like, has pairs of gripping units, indicated generally at H and I5, supported thereby. These units are identical in structure and a description of one will apply to the other. Identical reference numerals will also be added to the various elements of each unit.

Considering now the unit l4, it will be observed that pairs of hangers or supporting elements I! and i8 have their upper ends straddling the support Ill (Figs. 1 and 2) and secured in place by suitable means such as welding IS. The elements I1 and I8 are parallel with each other and have aligned apertures in their lower ends to receive and support a shaft 20 which is held against longitudinal movement by suitable means such as pins 2|. Gripping elements, indicated generally at 23 and 24, have spaced members 25 and 28, respectively, of the contours shown in Figs. '1 and 3. The lower portions of each pair of members 25 and 28 are joined by arcuate gripping plates 21 and 28, respectively, which are to conform to the contour of an article 30 to be gripped and transported, the article in the present embodiment being cylindrical. The adjacent portions of the members 25 and 26 are also arcuate, as shown, to conform to the article 30 and their gripping plates 21 and 28. The members 25 and 26 of each element 23 and 24 are pivotally supported upon a common shaft 32 and have triangular apertures 33 and 34, respectively, in their upper portions to receive the shaft 20 and to [provide cooperating cam surfaces 35 and 36, respectively, which are to function with the shaft in controlling the elements 23 and 24.

Means is provided to move the elements 23 and 24 into the open position shown in Fig. 1. This means includes a single link pivotally connected at 4| to the element 23 and at 42 to a double link 43. The link 43 is pivotally connected at 44 to the element 24 and extends therebeyond to receive a pivotal connection 45 with a link 46. The link 46 has its upper end pivotally connected at 41 to a lever 48, the latter having its inner end or ends, it being formed of two parts joined by blocks 49, connected to a sleeve bearing member 50 rotatably disposed on the shaft 20 between the pairs of elements I1 and I8 (see Fig. 4). The lever 48 of the unit I 4 is connected to the lever 48 of the unit l5 by a tubular handle 52 for simultaneous actuation of both units.

Attention is again drawn to the links 40 and 43, it being apparent that their pivots 4| and 44 lie in a common horizontal plane and are at identical positions in each element. Furthermore, the length of the links 4|) and 43 between their respective pivots 4| and 44 and their connecting pivot 42 are equal.

Upon considering now the operation of the grapple, let it be assumed that the elements 23 and 24 of each unit l4 and I5 are in their open positions as illustrated in Fig, 1. When in this position the pivot 42 of the links 40 and 43 is below dead center with the pivots 4| and 44, the links bearing against the upper edges of the gripping plates 21 and 28. When in this position as long as theunits are supported by the lifting means, namely the shaft 20 engaging the cam of the shaft and its cam surfaces.

' the hook l2, bar In, the supporting elements I1 and I8 and the shaft 20 are lowered sufliciently to move the shaft 20 away from the cam surfaces and 36, the elements of their own weight will move about their pivot 42 so that the lower gripping portions of the elements may move into engagement with the article. Through this action it is apparent that the grapple, when lowered over an article, is automatically unlocked and ready to grip the article. Furthermore, the grapple will be automatically closed about the article through the raising of the lifting means, causing the shaft 20 to engage the cam surfaces 35 and 36, forcing the lower portions of the elements about the article. Furthermore, the rounded lower ends of the elements, particularly the members 25 and 26 of each unit, find their way beneath the article during relative movement The weight of the article assists in the strong gripping connection between the elements and the article, adding its weight to that of the elements in causing relative rotation of the elements about the shaft 32 through the downward sliding movement of the cam surfaces relative to the shaft 20.

When the article has been gripped and raised above the supporting surface, the units are locked in the gripping position through the shaft 20 and the cam surfaces, and it is impossible for the article to be accidentally disengaged from the grapple during its transportation from one position to another. Furthermore, itis not possible to release the grapple from the article until the article is lowered upon a support or until the units with the article rest upon a support and the lifting means is lowered sufliciently to move the shaft 20 downwardly for the free movement of the elements about their pivot 42. When in this position, through the aid of the handle 52 and the connecting links 46 of each unit, the links and 43 may be moved from the position shown in Fig. 3 to the position shown in Fig. 1, where the pivot 42 is moved beyond dead center about its associated pivots 4| and 44 and moved into locking engagement with the gripping plates 21 and 2B.

Although specific improvements of the invention have been'shown and described, it will be understood that they are but illustrative and that various modifications may be made therein without departing from the scope and spirit of this invention as defined by the appended claims.

What is claimed is:

1. A grapple for use in transporting articles comprising companion elements with lower gripping portions formed to partially conform to an individual cylindrical article, and transverse surfaces of the upper portions thereof, means to pivotally connect the elements together intermediate the said portions, a lifting member for the elements, an actuating member carried by the lifting member and positioned to engage the transverse surfaces and be moved relative thereto to cause movement of the elements into closed positions about their pivotal connection to move the lower portions into gripping engagement with the article, a lever pivotally supported by the actuating member, and means pivotally connected to the lever and actuatble thereby to move the elements into op en positions to free the article and to lock the elements in their open positions.

2. A grapple for use in transporting articles comprising companion elements with lower gripping portions formed to partially conform to an article, and transversely extending cam surfaces of the upper portions thereof, means to pivotally connect the elements together intermediate the said portions, a lifting member for the elements, a shaft carried by the lifting member and positioned in engagement with the cam surfaces to be moved relative thereto to cause movement of the elements into closed positions about their pivotal connection to move the lower portions into gripping engagement with the article, a lever pivotally supported by the shaft, and means pivotally connected to the lever and actuable thereby to move the elements into open positions to free the article and to lock the elements in their open positions.

3. A grapple for use in transporting articles comprising companion elements with lower gripping portions formed to partially conform to an article, and transversely extending cam surfaces of the upper portions thereof, means to pivotally connect the elements together intermediate the said portions, a lifting member for the elements, a shaft carried by the lifting member and positioned in engagement with the cam surfaces to be moved relative thereto to cause movement of the elements into closed positions about their pivotal connection to move the lower portions into gripping engagement with the article, a

lever pivotally supported by the shaft, companion links pivotally connected to each other and to their respective elements, and means operatively connecting the links with the lever for actuation thereof by the lever to move the elements into open positions to free the article.

4. A grapple for use in transporting elongate articles comprising lifting means including a spreader bar and a rod carried thereby, units disposed at spaced positions relative to each other and the rod and each including companion elements pivotally connected intermediate their ends, their lower ends formed to grip an elongate article therebetween, while their upper ends have transversely extending surfaces resting upon the rod and providing the only connection between the lifting means and the units, relative movement of the rod and cam surfaces caused by upward movement of the lifting means causing closing of the elements of the units about spaced portions of the elements, levers pivotally carried by the rod, and means actuable by movement of the levers to move the elements of the units into their open positions.

5. A grapple for use in transporting elongate articles comprising lifting means including a spreader bar and a rod carried thereby, units disposed at spaced positions relative to each other and the rod and each including companion elements pivotally connected intermediate their ends, their lower ends formed to grip an elongate article therebetween, while their upper ends have transversely extending surfaces resting upon the rod and providing the only connection between the lifting means and the units, relative movement of the rod and cam surfaces caused by upward movement of the lifting means causing closing of the elements of the units about spaced portions of the elements, levers pivotally carried by the rod, and means actuable by movement of the levers to move the elements of the units into spreader bar and a rod carried thereby, units dis-- posed at spaced positions relative to each other and the rod and each including companion elements pivotally connected intermediate their ends, their lower ends formed to grip an elongate the lifting means and the units, relative movement of the rod and cam surfaces caused by upward movement of the lifting means causing closing of the elements of the units about spaced portions of the elements, levers pivotally carried by the rod, means actuable by movement of the levers to move the elements of the units into their open positions, and means to operatively connect the levers for simultaneous actuation article therebetween, while their upper ends have 10 thereof.

transversely extending surfaces resting upon the rod and providing the only connection between DONALD H. MITCHELL.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2515666 *Aug 17, 1945Jul 18, 1950Alba H RiceDevice for lifting bricks and the like
US2574835 *May 24, 1949Nov 13, 1951Loney Frederick RAutomatically opening and closing lifting hook
US2602001 *Feb 21, 1950Jul 1, 1952Knapp Charles WSelf-locking grappling unit
US2665814 *Jun 23, 1951Jan 12, 1954Sylvania Electric ProdArticle transfer apparatus
US2923252 *Mar 17, 1958Feb 2, 1960Rogowski Frank JNippers for railroad ties
US3008753 *Nov 25, 1958Nov 14, 1961Geno TazioliPipe tongs
US3097011 *May 31, 1960Jul 9, 1963Don Foster RobertPipe tongs
US3770140 *Sep 23, 1970Nov 6, 1973American Ass CyberneticsSensor responsive cybernetics machine
US5085480 *Jul 15, 1991Feb 4, 1992Jackson Donald TCam operated workpiece engaging apparatus
US5301533 *Jul 23, 1992Apr 12, 1994Jackson Donald TCam operated pierce apparatus
US5315855 *Feb 19, 1993May 31, 1994Jackson Donald TCam operated hemming apparatus
US5409280 *Sep 3, 1993Apr 25, 1995Weatherford/Lamb, Inc.Pipe clamp
US5755476 *Sep 27, 1996May 26, 1998Hosking; JohnHoist lock
US6012752 *Feb 24, 1999Jan 11, 2000Douglas; William E.Concrete pipe lifting apparatus
US6568731 *Mar 22, 2001May 27, 2003Alexander, Iii William J.Pipe lifting apparatus and method
US7076910 *May 18, 2004Jul 18, 2006Jorge XifraFlash landing and control device
US7207612 *Mar 23, 2005Apr 24, 2007Terry RaneySuspended lifting apparatus
US8366162 *Apr 13, 2011Feb 5, 2013Alaska Native Technologies, LlcRetrieval systems and methods for floating objects
US9458949 *Aug 18, 2011Oct 4, 2016Richard S. McKinleyLoading devices and methods of loading pipe fusion machines
US20060214444 *Mar 23, 2005Sep 28, 2006Terry RaneySuspended lifting apparatus
US20100143083 *Dec 4, 2008Jun 10, 2010Dennis Alan LundellTire building core transport assembly and method
US20110254302 *Apr 13, 2011Oct 20, 2011Alaska Native Technologies, LlcRetrieval systems and methods for floating objects
US20130045074 *Aug 18, 2011Feb 21, 2013Fast Fusion, LlcLoading Devices and Methods Of Loading Pipe Fusion Machines
Classifications
U.S. Classification294/110.1, 294/116, 294/81.61, 294/117
International ClassificationB66C1/42
Cooperative ClassificationB66C1/422
European ClassificationB66C1/42B