DE2338309A1 - Adjustable tongs - one jaw pivots on coupling piece on adjusting screw in slot in other jaw - Google Patents

Abstract

The tongs have jaws inclined to the handles, one of them having an oblong slot ion the part near the jaw, in which a loose connector piece, with a trunnion on which the other jaw pivots, fits. The piece has an internal screw thread in a bore, in which an adjusting screw, carried in bearings at the ends of the slot in the first jaw, works, one end of it extending slightly beyond the bearing so that it can be gripped and turned. Thus the positions of the jaws in relation to each other can be adjusted without opening them. The adjusting screw thread can be of the 'Acme' type, its pitch being approximately half its diameter.

Description

DR. MÜLLER-BORE DlPl.-PHt'S. D *. MANI ^T Z DIPL. CHEM. DR. DEUFEL DIPL.-ING. FINSTERWALD DIPL.-ING. GRÄMKOW

GN / Kä - B 1164

.-. üncheii, den '-.?. 'J /: ■

CHAJRLE3 JüSKPH BUHI ¹ HaKD ϊ

1800 elizabeth avenue, hetairie, louisiana,

Adjustable joint pliers

The invention relates to a pair of pliers, in particular pliers with angled jaws, in which the jaws without a corresponding movement of the pliers handles to open and close can be adjusted.

An object of the invention is to provide angled jawed pliers in which the jaws through Screwing can be adjusted to set an initial opening of the jaws, which is then through the handles are controllable.

Another object of the invention is to have the number of parts and the connecting effects between them adjustable in one Pliers to reduce.

409886/0316

Dr. Manitz Dr. Deufel Dipl.-Ing. Finsterwald Dipl.-Ing. Grimkov

8 Munich 22, Robert-Koch-StraBa 1 7 Stuttgart-Bad Cannttatt, MarktstraB 3

Telephone (0811) 293645, Telex 5-22050 mbpat Telephone (0711) 567261 Bank: Central Cash Office · Bayer. Volksbanken, Munich. Account no. 9822 Poctscheck: Munich 95485

Yet another object of the invention is to reduce the size and length of adjustable pliers by a combination of to reduce the need to partially cut out one part of the pliers and move the jaw of the other part of the pliers to the side, to cause fully opposing jaws.

Other objects will emerge from the following exemplary drawing and description of the invention. the Drawing shows in:

Fig. 1 is a side view of the pliers according to the invention;

Fig. 2 is a section along the line 2-2 in Fig. 1j Fig. 3 shows a section along the line 3-3 in Fig. 1}

Figure 4 is a perspective view of an adjustable pivot pin assembly like the invention; and

Fig. 5 is a plan view of the laterally offset jaw.

According to the drawing, the invention comprises two tong elements 1 and 2, respectively, which are partially threaded by a Bolts 3 are adjustable articulated to one another. The bolt engages rotatably in one with a corresponding thread provided block 4 to which a hinge pin 4a is fixed normal to the engaged bolt 3. That Forceps element 2 defines a hole for rotatably attaching the former to the hinge pin 4a; it will be on this secured by a nut 5 which engages with a threaded pivot pin extension 4b stands.

409886/0316

The forceps element 2 is thereby connected to the forceps element 1 connected that the block 4 is inserted into a certain by the forceps element 1 slot 1 a, and that with Threaded bolt 3 is partially inserted into slot 1a through an upper bearing opening 1b to to come into engagement with the block 4 by relative rotation of the corresponding screw threads. The bolt extends into the slot 1a until the base of the screw threads 3a against the base 1c of the slot 1a bumps. Unthreaded top and bottom extensions 3b and 3c, respectively, of the bolt 3 are rotatably engaged with upper and lower bearings 1d and 1e shown in FIG the element 1 is determined and arranged in the axial extension of the slot 1a. The bolt 3 is in the Slot 1a held by a knurled thumb nut 6, the with the threaded extension 3d of the bolt 3 is engaged. Rotation of the bolt 3 by the thumb nut 6 causes the block 4 and those attached to it Hinge pin 4a to move up and down the length of slot 1a to engage jaws 1f and 2a to open or close the forceps elements 1 and 2 in introductory openings without the handles 1g and 2b, respectively to move.

The slot 1a is kept wide enough to allow the block 4 to pass up and down in it without the Touching sides of the same (see Fig. 1). The hinge pin 4a is longer than the recessed area 2c thick is to protrude 0.025 mm (0.001 * ') above and cause that the retaining nut 5 rests on it rather than on the tong element 2 (see FIG. 3). Likewise extends the unthreaded extension 3c of the bolt 0.025mm (0.001 ") above the lower bearing 1e so that the Rande1-Dauraennut 6 rests against it in order to close the bolt 3

409886/031 6

without pressing the bolt 3 against the stopper base 1c (see Fig. 2).

The jaws 1f and 2a of the elements 1 and 2 would be offset by the thickness of the recess area of the element 2 be. (See Figure 3). However, the jaw 1f is offset by this amount (see FIG. 5) to bring the jaws in fully opposite positions.

The corresponding external and internal threads of the bolt and of the block 4 are preferably threads of the "Acme type" with a pitch of about half the diameter.

- patent claims -

409886/0316

Claims (2)

Claims 1. ) Adjustable joint pliers with jaws angled from handles, characterized by a pliers element with an elongated slot with open, oppositely arranged upper and lower ends, which is arranged in the handle near its jaw and has open-ended upper and lower bearings which are are arranged in register in the upper and lower ends of the slot; a further pincer element, which has a round hole in its handle near its jaw for articulated attachment relative to the one pincer element) a connecting device which can be loosely fitted into the elongated slot of the one pincer element3 and has an internally threaded hole and a hinge pin which extends normal thereto and is engageable with the circular hole of the other forceps element and extends slightly therethrough for hinged attachment of the other forceps element thereto; first holding means connectable to the extended end of the hinge pin for holding the other forceps element on the pin without connecting it therewith; a second combination connecting device with pin ends which can rotatably engage in the open-ended lower and upper bearings of a tong element, wherein the lower pin end extends slightly beyond the lower bearing and the second connecting device is provided with an intermediate part with complementary external threads, 409886/031 6 engaging the internally threaded hole of the first combination connector can and is loosely fitted in the elongated slot to the first connector in the slot to hold and move lengthways in this when it is rotated in the bearings; a second holding device, which can be connected to the extended end of the lower pin end of the second connecting device is to the second connecting means in the upper and lower bearings and the elongated slot to hold without locking it therein and to rotate the second connecting device to move the first connector in the elongated slot, thereby changing the position of the attached hinge pin and the jaw of the other pincer element with respect to the jaw of the one pincer element in the longitudinal direction is changed to adjust the jaw opening without moving the handles; and a dual device for introducing the articulated angled jaws of the forceps elements in completely opposite ones Positions. 2. Joint pliers according to claim 1, characterized in that the double device for introducing the articulated angled Jaws in fully opposite positions includes the other pincer element, this a recess around the round hole in its handle determines the displacement of the jaws by reducing the depth of the recess; and that the jaw of the one pincer element for the remainder of the displacement is offset to bring the jaws into fully opposite positions. 409886/0316 Articulated pliers according to Claim 1, characterized in that the external and internal threads of the bolt and of the second combination connecting device are threads
of the "Acme'J" type with a pitch of about half their diameter. 409886/031 6