Tools – Wrench – screwdriver – or driver therefor – Plural pivoted jaws and handle-lever
Patent
1991-05-24
1994-05-31
Meislin, D. S.
Tools
Wrench, screwdriver, or driver therefor
Plural pivoted jaws and handle-lever
81 912, B25B 1328
Patent
active
053159039
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention concerns a universal, self-locking vise assembly having, at the same time, a fixable and movable pair of jaws.
BACKGROUND DISCUSSION
Actually, there are two fundamental kinds of vise assemblies or gripping devices: one with jaws that are fixed in position in accordance with the many different dimensions of nuts, and the other kind with movable jaws. In this last kind, for obtaining the locking and therefore the rotation of the nuts, the two jaws must be adapted to the different dimensions of said nuts through the movement of an adjustment screw or by means of other known methods.
SUMMARY OF THE INVENTION
The vise assembly or gripping device according to the present invention is able to obtain, with one single operation, the adaptation to the nut as well as the locking thereof and therefore the rotation thereof for each dimension of said nut. In the same way, it works also for tubes, square tiles, etc.
BRIEF DESCRIPTION OF THE PREFERRED EMBODIMENT
The present invention is described more in detail hereinbelow according to the enclosed drawings, in which a preferred embodiment is shown.
FIGS. 1, 2A, 2B, 3-5, and 6-9 respectively show a scheme with details and an axonometric view with details of a self-locking vise assembly.
FIGS. 10A, 10B, 11 and 12 show two lateral views and a cross section of the vise assembly.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
The FIGURES show a universal, self-locking vise assembly mainly consisting of four pieces: two jaws 1 and 2, a fork 3 and a handle 4.
In the proportions shown in the FIGURES, said jaw 1 has a groove of 5 cm length and 4 to 8 mm width, and is placed in the exact position shown in the drawing, i.e. it respects the exact proportions between said groove and the (toothed and non-toothed) lines of the perimeter of the jaw. The lower beginning or first abutment end of the jaw is at 5 mm distance from edge 5, and the opposite abutment end thereof is at 7 mm distance from edge 6.
Said groove has the function of guiding the pin (or the roller-pin) 7, which is formed out of one piece with a fork 3. Said fork 3 is connected to handle 4 by means of pin 9.
The handle however may assume, by means of a displacement of about 1 cm with respect to said fork, position 10 shown at the left side of FIG. 5, and position 11 shown in dotted lines at the right of said FIGURE. The handle is stopped in its movement on the right and on the left by means for limitating rotation of said handle with respect to said fork such as stops 12 (small square projections), coming out of the fork.
Said movement of the handle serves for the self-locking of the vise assembly with respect to the nut (in the dotted lines between the two jaws) in the following way: in FIGS. 8 and 9, the detail 13 shows one of the internal sides of the fork (in section and in axonometric view). Detail 14 shows a slot 14 in the fork having the shape of a section of circumference (about 1 cm) with the center in pin 9.
In said slot, a tooth (or pin) 15 slides, since it is formed out of one piece with the handle, when said handle moves to position 16 to the left. Through use of a means for locking one of said jaws with respect to the fork, both jaws move into position about the nut. The means for locking one of said jaws includes a pawl 17, an expansion spring 18, and a toothed edge on one of the jaws. Pawl 17 locks the jaw 2 in the following way: an expansion spring 18 (that may be of different kind) has a left end attached to the fork and a right end that pushes constantly on the pawl 17 (through its hook). Reference 19 shows a pin, formed as one piece with fork 3, on which the pawl rotates such that the pawl gets inserted between the (saw) teeth of jaw 2 locking the same. Also jaw 1 is locked because it is connected to jaw 2 by pin 20 and because jaw 2 may rotate on pin 21 which is out of one piece with fork 3. In that way the vise assembly becomes fixed for any different opening relative to the different dimensions of the nuts (or other component being worke
REFERENCES:
patent: 615643 (1898-12-01), Strahle
patent: 701237 (1902-05-01), Wight
patent: 1191325 (1916-07-01), Liesemeyer
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