US1646938A - Lifting grab and the like - Google Patents

Description

25 192 Oct 7 G. w. STEIGER LIFTING GRAB AND THE LIKE 2 Sheets-Sheet 1 Filed Jan. 5; 1927 1,646,938 G. W. STEIGER 1.1mm; GRAB AND was mm Filed Jan. s, 1927 2 Sheets-Sheet 2 uventor,

Patented Unit. 25, 1%27.

enonen WILLIAM; STEIGER; or JAMAICA, unw Yeast.

LIFTING GRACE AND THE LIKE.

App1ication filed January 5, 1927. Serial No. 159,091.

This invention relates to improvements in hoisting devices and it has particular reference to the provision of an improved lifting grab or the like.

It is an object of this invention to provide an lll'lPlOVGd grab adapted to permit the ready seizure or release of the article to be raised or lowered. A further object of the invention is to provide means whereby the article held in the grab may be rotated at will without necessitating the release of the ar ticle, and it will be observed that such a device is particularly adapted for the transportation of the parts of a dyeing or bleaching apparatus wherein it is necessary for the goods to be transported from the kier into a washing machine and revolved therein. Other objects and advantages will be obvious from the following description of a preferred embodiment constructed in accordance with the invention.

Figure 1 shows a part longitudinal section on line 11 of Figure 2 of the improved grab.

Figure 2 shows a plan view and Figure 3 a section on line 111-411 of Figure 1.

Referring to the drawings in which like numerals indicate like parts through the same, 1 indicates a cent :11 shaft or bar adapted to be depended at its upper end 2 from any suitable arrangement such as from a chain passing over a series of pulleys (not shown). The lower end of the shaft 1 is formed or provided with a projecting member 3 upon which rests a ball-bearing or similar device l which in turn supports an encircling member or sleeve 5 adapted to en gage slid-ably with the shaft 1. The encircling or sleeve member 5 carries a. plurality of evenly spaced supporting); lugs 6 and said member 5 is provided with openings or notches through which project a plurality of claws 7 rotatably mounted in said lugs 6 upon spindles or shafts 8. Each lug 6 is connected to an upper lug 9 by means of a couecting link 10 mounted at 11 and 12. The upper lug 9 is secured to a collar 13 which encircles the member 5 at the upper end of the latter and is secured to supporting rods or tie bolts 1% by means of abutments 15 through which said rods or tie bolts 14 pass and are secured therein by lock nuts 16 and 17. The tie bolts 14. are secured to a suitable member 18 adapted to receive the article to be lifted, it being understood that the member 18 maybe of any suitable form. The collar device 13 is provided with a shaft or spindle 19 secured in two supporting lugs 20 and on which shaft 19 is rotatably mounted a pawl 21 actuated by means of a handle 22 which operates the spindle or shaft 19. The pawl 21 is adapted to engage in a notch or incision 23 in the upper part of the mem her 5.

In operation the article to be raised is held within the member 18 by means of the suit ably formed claws 7 and to release said article the handle 22 is raised from the horizontal to the substantially vertical position shown in dotted lines in Figure 1. The movement of the handle 22 rotates the shaft 19 and causes the pawl 21 to slidably disengage from the notch 23. The member 5 is thus no longer supported by the pawl 21 and under the action of gravity the member 5 drops until the same is supported upon the upper surface of the receptacle device 18. The claws 7 of the grab will then take up the position indicated in dotted lines in Figure 1 and will thus be released from the article within the member 18. In order that the securing means may be fully appreciated the head of a spool carrier is shown in chain lines in position within the receptacle device 18.

I claim:

'1. A lifting grab comprising a shaft, a projection on the lower end of said shaft, means supported on said projection adapted to permit the rotation of said grab, an inner sleeve member supported on said rotating means, claw attachments secured to said in ner sleeve member and means for bringing said claws into engagement or disengagement with the article to be lifted.

2. A lifting grab comprising a shaft, a projection on the lower end of said shaft, means supported on said projection adapted to permit the rotation of said grab, an inner sleeve member carried on said rotating means, a plurality of lugs secured to said inner sleeve, recesses in said inner sleeve adapted to receive the upper ends of a plurality of claw devices pivotally mounted in said lugs, link members pivotally connecting said claws with upper lugs secured to an upper sleeve member supported by tie-bolts secured in means adapted to receive the article to be lifted.

3. A. lifting grab as claimed in claim 2, comprising a pawl pivotally mounted on llt) said upper sleeve member and adapted to engage in a recess or opening provlded 1n.

the upper end of said inner sleeve member, and a handle adapted to permit the'engage ment or disengagement of said pawl in said recess.

V GPA liftlng "grab comprising a shaft, means for attaching said shaft to a hoisting device, a ball-bearing device carried on said shaft, an inner sleeve member supported on said ball-bearing device, a plurality of claw members pivotallymounted in lugs projecting from said inner sleeve member, an outer sleeve member supported on said lugs, link members pivotally connecting said claw members to said outer sleeve member, a pawl carried on a shaft mounted'in said outer sleeve member and means for bringing saidpawl into and out of engagement with arecess positioned in said inner sleeve member. r i

7. In a lifting grab as claimed in claim 6, a handle adapted to rotatably bring said pawl into and out of engagement With the recess.

In testimony whereof I affix my signature.

GEORGE W. STEIGER.

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