US1182815A

US1182815A - Pliers.

Info

Publication number: US1182815A
Application number: US3720315A
Authority: US
Inventors: Dan B Swickard
Original assignee: Individual
Current assignee: Individual
Priority date: 1915-06-30
Filing date: 1915-06-30
Publication date: 1916-05-09
Anticipated expiration: 1933-05-09

Description

D. B. SWICKARD.

PLIERS.

APPLICATION FILED JUNE 30. 1915.

l 182,8 1 5 Patented May 9, 1916.

UNITED %TATE% DAN B. SWICKARD, 0F GALVA, ILLINOIS.

PLIERS.

Application filed June 30, 1915.

To all whom it" may concern Be it known that I, DAN B. SWIOKARD, a citizen of the United States, residing at Galva, in the county of Henry and State of Illinois, have invented certain new and useful Improvements in Pliers; and I do hereby declare the following to be a full, clear, and

exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention is a hand tool in the nature of a combined wrench and pliers having for its object to simplify the construction and to increase the power of the tool over the ordinary pliers wherein the jaws are permanently and equally pivoted to operate in a predetermined manner.

The invention is characterized by the provision of a swinging jaw supported by a link with relation to the other jaw, and means to adjust the operating capacity of the jaws of the tool.

While different embodiments of the invention are disclosed in the accompanying drawings, it is to be understood that the constructions therein disclosed are for the purposes of illustration only and not as defining the limits of the invention.

In the drawings: Figure 1 is a side elevation of one side of a tool. Fig. 2 is a side elevation of the other side of the tool shown in Fig. 1. Fig. 3 is a side elevation of another embodiment of the invention wherein the link and connecting strap are mounted upon the same side of the tool. Fig. 4 is an other embodiment of the invention wherein the handle is provided with the teeth for the rack.

In the embodiment illustrated in Figs. 1 and 2, the tool is shown comprising a plurality of members, the upper member 1 terminating in a lower jaw 2, the lower member 3 terminating in an upper jaw l. A link 5, which may be of any preferred form, is shown pivotally connected at 6 to the upper member 1 at the rear 9f its jaw 2, and preferably on the inclined portion 6 of said upper member. If desired, this inclined portion may be thickened to give increased strength to the tool. In this figure of the drawing, the link is shown curved upwardly and forwardly from its pivotal point 6 to a position in advance of said pivotal point 6, where the link 5 is pivotally connected at 8 to the up per jaw 4. The pivotal connection 6 does not extend through both

members

1 and 3,

Specification of Letters Patent.

Patented May 9,1216.

Serial No. 37,203.

but merely through the member 1. The link 5 isshown provided with an offset 9 serving asmeans to pivotally connect a threaded rod 10 which may have sliding engagement with a. yoke 11 supported by the upper member 1.v This yoke may be formed integral with a connecting strap 12 which is rigidly secured to the lower jaw 2 at 13, as illustrated in Fig. 2. lVithin the yoke may be mounted a rotatable threaded nut 1 1 which is adapted to engage the rod 10 for the purpose of moving the rod to various positions with relation to the upper member 1 and in consequence drawing the upper jaw 4 to various positions with relation to the lower jaw. By rotating the nut 14 to draw the rack farther to the right in Fig. 1, the upper jaw 4 will be lifted upwardly and rearwardly with. relation to the lower jaw 2, and by virtue of its swinging connection with said lower jaw will increase the distance between the engaging surfaces of the two jaws, as will be readily understood. This action enables a mechanic or operator to use the tool on rods orv pipes of large diameter. When a rod or pipe of small diameter is to be engaged by the tool, the nut 14 is rotated to move the rod to the left until the jaws firmly are into contact with the object to be engaged, whereupon the handles may be contracted to bring the j aws into frictional engagement with the rod or pipe in theusual manner. It is obvious that the yoke 11 may be formed as an integral part of the upper member 1 if so desired, or may be made separately therefrom and secured thereto 'by any suitable means.

In the embodiment of Fig. 3, the link 15. is similar to the link 5 of Fig. 1, but is shown positioned upon the same side of the tool as the strap 12. In this form of the device, as in the form in Figs. 1 and 2, the lower member 3 is mounted for swinging engagement with relation to the upper member 1, and is pivotally mounted from the link which supports the variable controlling mechanism 1014 carried by the upper member.

In the embodiment of the invention illustrated in Fig. 4, the upper member 1 is provided with the usual jaw 2, and in addition thereto the handle is formed with a threaded rod 16. The link 5 is connected to the lower jaw 2 and to the upper jaw 4 in the manner described in Figs. 1 and 2, but a connecting link 17 is shown pivotally mounted at 18 llf) Iunl

to the link 5 and pivoted at 19 to 'a yoke 20, which is slidably mounted upon the handle of member 1. This yoke 20 may be employed to inclose or house a suitable rotatable element such as an adjusting nut 21 similar to the nut 1d of Figs. 1 to 8. The same relative action is secured in this form of device as in the other figures, namely, the swinging pivotal movement of one jaw with relation to its cooperating jaw. Increased power is obtained by this form of pliers over the ordinary straight nose pliers having a single central pivot for the two jaws. This increased power is due to the construction wherein the connecting link 5 is so mounted that it, and the lower jaw 2 are substantially It has been found in operation that when the position of the jaws has been varied by means of the nut 1 1 and rod 10, to contact firmly with the object to be operated upon, the lower member 2 may be grasped at the handle part thereof and the object may be turned without touching the upper handle, the jaws being drawn tightly over the object such as a pipe, as increased stress is applied to the lever handle. The tool, however, is designed to be grasped by both of the

handle members

1 and 3 whereby a firm hold and greater power can be efiected than in a tool wherein the jaws are permanently fixedwith relation to each other.

It is obvious that various changes may be made in the form and proportion of the parts, and the right is reserved to make such changes and alterations as fairly fall within the scope of the appended claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. A tool of the class described comprising a plurality of members each having a jaw, a link pivotally mounted on one member near the rear end of the jaw, and pivoted to the other member near the central part of the jaw, and a threaded element adjustable longitudinally of the jaw to vary the operative position of the jaws.

2. A tool of the class described comprising a plurality of members each having a jaw, a link pivotally mounted on one member near the rear end of the jaw, and pivoted to the other member near the central part of the jaw, and a threaded element pivotally connected with the link near the central part of said last named jaw to vary the operative position of the jaws.

3. A tool of the class described comprising a plurality of crossing members each having a handle and a jaw, a link pivoted to one member at a point substantially where it crosses its adjacent member, said link being pivoted to the other member at the jaw, a threaded element to vary the operative position of the jaws and handles, and pivotal connection between the threaded element and the link.

4. A tool of the class described comprising a plurality of crossing members each formed into a handle and a jaw, a link pivoted to one of the members at substantially the point of crossing of said members, said link being pivotally mounted to the other of said members forwardly of the first named pivotal connection to permit of swinging movement with relation to the first named member, a threaded element carried by one of said members and having pivotal connection with said link, and a rotatable element to engage the threaded element to vary the operative position of said jaws.

5. A tool of the class described comprising a plurality of crossing members each formed into a handle and a jaw, a link pivoted to one member near the base of its jaw and extending upwardly and forwardly for pivotal connection with the other jaw in advance of the crossing of the members, a threaded rod pivoted to said link above the jaw, and means to engage the rod to vary the position of one of said jaws.

6. A tool of the class described comprising a plurality of crossing members each having a handle and a jaw, one of said members being provided with a slot adjacent to the jaw to permit of loosely mounting the other member, a plate to guide the movement of the loosely mounted member, a link connected with the loosely mounted member substantially at the point where it crosses the other member, and connected to the other member at the jaw, and a threaded rod pivoted to the link and adjustably connected with the handle to vary the position of the jaws independently of the movement imparted to the jaws by the handle.

In testimony whereof, I aiiix my signature, in presence of two witnesses.

DAN B. SWICKARD. lVitnesses C. I. GIBBS, D. A. lVEs'r.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.