US3628820A

US3628820A - Swivel-type hoist ring

Info

Publication number: US3628820A
Application number: US886256A
Authority: US
Inventors: Leland F Blatt
Original assignee: Leland F Blatt
Current assignee: ISI MANUFACTURING Inc A MI CORP
Priority date: 1969-12-18
Filing date: 1969-12-18
Publication date: 1971-12-21
Anticipated expiration: 1988-12-21

Abstract

A hoist ring assembly which includes a base block having a bore therein, extending from the front to the back thereof, a screw seated in the bore having a threaded portion which extends beyond the block, the block being adapted to revolve around that portion of the screw seated in the bore, and a hoist ring mounted in the block above the bore and adapted for swiveling movement on an axis transverse to that of the bore.

Description

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INVENTOR LELAND F. BLATT WM. Amy@ ATTORNEYS swrvEL-TYPE uors'r RING BACKGROUND OF THE INVENTION l. Field of the Invention This invention relates to a hoist ring assembly which can be attached to a tool, die, fixture or other structure for the purpose of safely lifting, loading or transporting the structure.

2. The Prior Art ln the prior art, hoist rings have been conventionally anchored into the piece of equipment to be moved. When a hook or cable was applied to the ring, the ring was unable to align itself in the direction of the pulling or lifting force and as a result thereof, high shear and bending moments were inflicted upon the ring. This condition eventually might cause failure of the ring with a resultant danger to loss of life and limb as a consequence of whatever was being lifted by the ring, being dropped.

A new type hoist ring assembly has now been developed which enables the ring to align itself in the direction of the pulling or lifting force independent of how it is rigged and as a result thereof high shear and bending moments on the ring have been substantially eliminated.

lt is therefore an object of this invention to provide the hoist ring assembly so constructed that it aligns itself in the direction of the pulling or lifting force and substantially eliminates high shear and bending moments from arising.

Other objects and features of the invention will become apparent from the more detailed description which follows and from the accompanying drawings, in which:

FIG. l is a side elevational view of the assembly of the invention;

FIG. 2 is a front elevational view of the assembly of the invention; and

FIG. 3 is a perspective view showing the hoist ring assembly m use.

DESCRIPTION OF THE PREFERRED EMBODIMENT The assembly l of this invention comprises a base block 12, preferably cast in one piece, having a bore 14 in the lower portion thereof extending from front to back. The bore has a section of enlarged diameter 16 on the front end thereof. A shoulder 18 is formed between the section of enlarged diameter 16 and the rest ofthe bore 14. The block 12 has a recess 20 located above the bore 14 which is alignedin a direction transverse to the direction of the axis of the bore 14. A retaining ring 22 is situated within the recess. The retaining n'ng 22 has a somewhat horseshoe shape in plan view with a substantially straight member 24 closing the ends of the horseshoe. The member 24 is situated in the recess 20.

After the ring 22 is placed in the recess 20, a plate 26 is welded in place between opposed walls of the recess to retain the ring 22 in place in the recess.

A shoulder screw 28 is seated in the bore 14. The screw 28 has a head 30 adapted to tit within the enlarged diameter section 16 of the bore 14. The bottom of the head 30 is in abutting relationship with the shoulder 18 between the enlarged diameter section 16 of the bore 14 and the rest of the bore 14. The screw 28 has a reduced diameter threaded body portion 32 which extends beyond the bore 14 and which is adapted to screw into a piece of equipment to be lifted. A shoulder 34 is fonned at the junction of the reduced diameter section 32 and that portion of the screw 28 in the bore 14. The screw 28 is retained in the bore 14 by means of metal deposits or stakes 36 which are deposited thereon after the screw 28 is inserted into the bore 14. Other means can also be used.

As can readily be visualized from FIGS. 1 and 2, the block 12 can be swiveled about the' axis of the bore 14 and the ring 22 can be swiveled about the axis of the recess 20 which is transverse to that of the axis of the bore 14.

When a hook or cable is applied to the ring, as seen in FIG. 3, the block 12 swivels around the screw 28 and aligns itself in the direction of the pulling'or lifting force on it, and the ring 22 also aligns itself in the direction of the pulling or lifting force. As a consequence, high shear and bending moments which are normally prevalent in stationery, screw-in lifting rings, are substantially eliminated.

What is claimed is:

1. A hoist ring assembly which comprises a block member having a transverse bore therein; an arcuate radial recess in said block member above said transverse bore and extending straight across the block in a direction transverse or normal to said bore, a hoist ring mounted in said arcuate recess having a swiveling axis normal to the axis of said transverse bore, a screw seated in and extending through and beyond said transverse bore having threads on that portion extending beyond said bore, whereby, when the threaded portion of said screw is threaded into an object to be hoisted, said block member is capable of swiveling movement about said screw and said ring is capable of swiveling movement about said axis normal to that of said screw; said arcuate radial recess extending in longitudinal direction opening through both lateral sides of said block member; and said h oist ring having a straight portion for disposal within said straight across arcuate radial recess, said straight portion permitting swiveling movement of said hoist ring within said recess through substantially 360; said bore having an enlarged counterbore section at the outer end thereof, a shoulder defined between said enlarged counterbore section and the rest of said bore, and wherein said screw has an enlarged head seated and nested entirely within said enlarged counterbore section, bearing against said shoulder; said arcuate radial recess in said block above said bore being provided in the backside thereof and wherein said hoist ring is retained in said radial recess by means of a plate welded to and extending between opposed sidewalls of said radial recess; said bore extending from the front to the back of said block member and wherein said arcuate radial recess has an axis offset to the axis of said bore.

Claims

1. A hoist ring assembly which comprises a block member having a transverse bore therein; an arcuate radial recess in said block member above said transverse bore and extending straight across the block in a direction transverse or normal to said bore, a hoist ring mounted in said arcuate recess having a swiveling axis normal to the axis of said transverse bore, a screw seated in and extending through and beyond said transverse bore having threads on that portion extending beyond said bore, whereby, when the threaded portion of said screw is threaded into an object to be hoisted, said block member is capable of swiveling movement about said screw and said ring is capable of swiveling movement about said axis normal to that of said screw; said arcuate radial recess extending in longitudinal direction opening through both lateral sides of said block member; and said hoist ring having a straight portion for disposal within said straight across arcuate radial recess, said straight portion permitting swiveling movement of said hoist ring within said recess through substantially 360*; said bore having an enlarged counterbore section at the outer end thereof, a shoulder defined between said enlarged counterbore section and the rest of said bore, and wherein said screw has an enlarged head seated and nested entirely within said enlarged counterbore section, bearing against said shoulder; said arcuate radial recess in said block above said bore being provided in the backside thereof and wherein said hoist ring is retained in said radial recess by means of a plate welded to and extending between opposed sidewalls of said radial recess; said bore extending from the front to the back of said block member and wherein said arcuate radial recess has an axis 90* offset to the axis of said bore.