US 1760885 A
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A. PRELESNIK GRIPPING DEVICE June 3, 1930;
Filed Feb. 8, 1928 2 Sheets-Sheet l Mnfrdtungfi,
ATTORNEY A. PRELESNIK GRIPPING DEVICE June 3, 1930.
Filed Feb. 8; 1928 2 Sheets-Sheet 2 INVENTOR ATTORN EY WITNESS:
Patented June 3, 1930 Wang ANTON PRELESNIK, OF EVELETH,..MINNESOTA: i
enirrnve nnvron Application filed February 8, 1928. Serial No. 252,838.
This invention relates to improvements in gripping devices and has for an object the provision of a device which is especially adapted for gripping metal plates and other fiat objects, so that these plates or objects may beheld without danger of slippage when being handled either manually, or by crane or derrick, or other hoisting apparatus.
Another object of the invention is the provision of a gripping device which is constructed so that an inward pressure will move the gripping elements relatively outward to receive the article to be gripped, and an outward pull will cause said elements to be brought into eflective gripping engagement,
so that articles overhead, as well as lower articles may be gripped and securely held.
lVith the above and other objects in view, the invention further includes the following novel features and details 01 construction, to
be hereinafter more fully described, illustrated in the accompanying drawings and pointed out in the appended claims.
In the drawings Figure 1 is an elevation of a gripping device constructed in accordance with the invention.
Figure 2 is a view at right angles to Figure 1.
Figure 3 is a section taken substantially on the line 33 of Figure 1.
Figure 4 is a similar view on the line 44 of Figure 2, the device being shown in use.
Figure 5 is a detail perspective view of one of the gripping jaws.
Figure 6 is an elevation showing a slightly different form of the invention especially adapted for use as a hand grip.
Figure 7 is a sectional View on the line 7-7 of Figure 6.
Figure 8 is an elevation with parts broken away and shown in section.
Referring to the drawings in detail where in like characters of reference denote correspending parts, the invention as illustrated comprises a pair of rigid arms 10 whose inher ends are joined so as to provide an inverted substantially V-shaped member. The
with recesses 11 and pivotally mounted within these recesses upon pivot pins 12 are the shanks 13 of gripping jaws 14. As shown, the shanks 13 of the gripping awsare so arranged that the inner ends or these jaws will tend to move toward one another when the device is in a vertical position, but this movement may be assisted by coiled springs 15. The outer ends of these springs bear upon the jaws while their inner ends are seated vithin sockets 16 provided in the opposed:
faces of the arms 10. The opposed faces of the jaws 14 are toothed or serratedas shown at 17. I
At the juncture of the inner ends of the arms 10 and upon opposite sides ofthesearms The. plates 19 are connect- The inner ends of the plates 19 are bitur- I cated to provide recesses 23 and jaws 24. These jaws are beveled as shown at 25 and are adapted to engage rollers 26 which extend oppositely from the inner ends of the jaws 14. The plates 19 are further connected by a bar 27 which is secured to the plates by means of pins 28. Tnterposed betweenthe bar 27 and the arms 10 is a coiledspring 29 which acts to yieldingly force the plates inward or toward the jaws 14.
In the use of the invention, the device is slipped over the edge of theplate P illustrated in Figure 4, the jaws 14 being moved relatively outward through a slight inward pressure upon the clevis 22. A'pull in the'opposite direction will cause the teeth of the jaws 14 to eltectively bite into the plate, the weight 01" the latter and the strength of the pull acting to more securely grip the plate.
Due to the manner of engagement between the jaws and plate, the device may be engaged with a plate or like object in an overhead position without fear of the device releasing the plate either before or after a pull.
This renders the device safe for use in overhead positions.
In Figures 6, 7 and 8, the device shown is especially adapted as a hand grip or hand puller. This device includes rigid arms 10 and gripping jaws 14 which are pivotally mounted in the arms. Mounted upon opposite sides of the jaws for sliding movement thereon are plates 19 which are connected by a bar 27 and a member 30, from which extends a handle or grip 31. The plates 19" carry jaws 24? at their inner ends to engage rollers 26. The bar 2 has extending therefrom a rod 32 which operates in a bore 33 provided in the arms 10 and which is surrounded by a spring 34 to force the plates 19 inward. The plates 19 are provided with spaced elongated slots through which extend headed studs 36. These studs are carried by the arms 10 and act to guide the plates and limit the latter in their sliding movement.
The invention is susceptible of various changes in its form, proportions and minor details of construction and the right is herein reserved to make such changes as properly fall within the scope of the appended claims.
Having described the invention what is claimed is 1. In a gripping device, a pair of spaced rigidly connected arms, opposed relatively movable gripping jaws carried thereby, means to movably mount the jaws, spring means to yieldingly force said jaws relatively inward, and means mounted upon the arms and movable toward the jaws to engage and force the latter relatively outward.
2. In a gripping device, a pair of spaced rigidly connected arms, opposed relatively movable gripping aws carried thereby, means to movably mount the jaws, means to yieldingly force said aws relatively inward, and a slidingly mounted spring actuated plate carried by the arms and engaging the jaws to move the latter relatively outward.
3. In a gripping device, a pair of spaced rigidly connected arms, opposed relatively movable gripping jaws carried thereby, means to movably mount the jaws, means to yieldingly force said jaws relatively inward,
slidingly mounted plates upon opposite sides of the arms, spring means to move the plates in one direction, means at the inner ends of the plates to engage and move the aws relatively outward when the plates are moved inward, and means connecting the plates whereby the latter may be moved relatively inward.
In testimony whereof I affix my signature.