US1939798A - Pipe wrench - Google Patents

Description

PIPE WRENCH Filed Sept. 9, 1932 AVU .Z L3 j] j /Oj J7/Tg @A "V /f E d l //7 N I i /J I @Y /0 i ff @5 :Snventor Gttorneg Patented Dec. 19, 1933 UNITED STATES PIPE WRENCH william o. ,Thewea North nidgeviue, ohio, as-

signor to The Ridge Tool Company, North Ridgeville, Ohio, a corporation of Ohio Application September 9, 1932. Serial No. 682,321

13 Claims. (Cl. 81-101) This invention relates broadly to wrenches and particularly to pipe wrenches, and thev primary object of the same is to provide an advantageous type of guide mounting for the shank of the movable-jaw of a pipe wrench which will always maintain the said jaw `and shank in a freelyslidable substantially neutral position in the housing or yoke member therefor;

Anotherobject is to provide'a cooperating V housing and guide construction for the movable jaw and shank of a pipe wrench which will always maintain the said jaw and shank in a neutral freely-sliding position in the yoke member of a jaw housing while at the same time perl5 mittingv the jaw to have a certain amount of resilient angular movement relative tothe fixed jaw so that the jaws may be more readily fitted to the work and rmly grip the latter without slipping.

Another object is to provide aguide mounting for the movable jaw of'a pipe wrench which is an improvement over prior known mountings and which at the same time is simple in design and does not complicate formation of the Vyoke :t5 member or jaw housing. y

' With the foregoing and other objects and advantages in View, the invention vconsists 'inthe preferred construction and arrangement of the several parts which will be more fully herein- .30 after described and claimed.

In the drawing2- Figure 1 is a view principally in side elevation with the yoke member or jaw housing broken away in part to show the method of mounting said jaw; Y y

Fig. 2 is a detail view of one of the parts; Y

Fig. 3 is a sectional view taken on the line 3 3, Fig. 1;

Fig. 4 is a fragmentary sectional View of fthe housing and fixed jaw portion of the wrench, showing a modified type of spring member, and Fig. 5 is a detail view of said member;

i Figs. 6 and 7 are, respectively, views similar to Figs. 4 and 5 of a further modied form of spring mounting;

Fig. 8 is a view in sectional side elevation of a still further modification in structure; and Y Fig. 9 is a viewtaken on the line 9--9, Fig.` 8.

Referring in detail to the drawing, the reference numeral 5 designates the handle portion of the wrench and 6 thefxed jaw portion having removably fixed thereon, by means of "pin `"I, a jaw plate 8. The movable fjaw is indicated yat 9 andis formed with the usual threaded shank 10 .55 which is adapted to move longitudinally in the guidev mounting requires no recessing or diffiyoke member `or housing `11. TheY handle portion 5 is preferably formed with a boss or projection 12, and an adjusting nut 13 is threaded on the shank 10 and is positioned between the said boss and housing. Y

The sidewalls of the housing 11 at the base of the latter are formed with a longitudinalslot 15, note particularly Fig. 3, defining stop shoul ders' 16. In this slotted portion av resilientlymounted guide 17 is positioned and preferably 66 extends longitudinally for the full'length of the housing. In the form shown in Figs. 1, 2 and 3, the guide 17 is provided with a retainer toe17a, which projects into a recess 18 formed between the jaw plate 8 and the end of the portion 6 -70 of the wrench. Spring-housing bores 19 are formed in the portion 6,-andtherein springs 20 are positioned and bear `against the guide 17, urging the latter against the stop shoulders 16. The bores -19 preferablyv extend at converging =75 angles,l to permit atoolto clearf the housing 11 vfrom this point toward the rear of the housing said Wall is substantially straight, as at 21a. Thus, at the rear` portion of the housing, the shank 10 of the movable jaw has a fairly snug sliding fit,suflicient clearance being permitted by I the spring'pressed-guide 17 so as not to hinder the vfreedom of ationf of said shank-'while at the forward portionl of said housing, the tapered wall permits a' certain additional limited-rocking motion under tensionof the shank when the jaws grip `the work. 'v

The advantages ofthe foregoing construction will be readily apparent to those familiar with wrenches of this type The spring-pressed guide 17 givesrthe` shank l0 of the movable jaw 195 9 a fairly snug` sliding'fit in the housing 11 without exerting uany binding action or pressure"thereon, ,since outward movement of1 said guide is limited by the stop shoulders 16, While at the same time the taperv 2l in conjunction -100 with the guide permits a vcertain amount of resilient rocking movement of the movable jawr relative to the fixed jaw so that the'jaws can be more readily fitted tothe Work and exert a firm grip on the latter without slipping. The jaws Yare always in the most favorable position to be 'adjusted to the work, and theY adjusting nut can be manipulated without any bindingaction whatsoever. Another advantage isv thatl the cult machining or boring operations in the side walls of the housing, which has to stand heavy duty and is generally made of forgedvand hardened metal, so that said housing can be pierced hot on a forging machine. The guide 17 is simple in construction and may be made from suitable sheet metal stamping. The body of the guide is preferably given an arcuate contour in cross section, to conform to the shape of the shank 10.

In Figs. 4 and 5, a modied type of guide is shown and consists of a piece of sheet metal having cut or stamped from the middle thereof spring legs 17D, the forward leg being formed with the retaining toe 17a. The side` strips 17e which remain after formation of the spring legs 1717 form the bearing portion of the guide. This type of guide eliminates formation of the bores 19 and is in one piece only.

In Figs. 6 and 7, the guide has retaining lugs or projections 17d stamped from the central portion thereof leaving the bearing or body portion 17e. These lugs or projections 17d engage in the springs 2O positioned in the bores 19.

In Figs. 8 and 9, the guide is mounted in the iback wall of ,the housing which is formed with the longitudinal slot 15. The guide is indicated at 17f and has stamped out or otherwise formed on the intermediate portion thereof projections 17g which extend into a recess 19a formed `in the back of the housing. A spring 20a is positioned 'in the recess around the projections 17g and maintains the guide under tension, .urging it against thestop shoulders 16 of the slot 15. In this construction, the taper 21 `may be omitted.

In each form shown, the guide is limited in its outward movement with respect to the shank 10 of the movable jaw 9 so that the said shank is always maintained in a substantially parallcf or neutral freely-sliding position with respect to its housing 11. Y

It will be understood that certain structural variations and modications may be adopted Within the scope of the appended claims Without departing from the spirit of the invention.

1. A wrench comprising a xed jaw and a movable jaw having a shank, a housing for said shank, and a resiliently-mounted member in said housing having restricted movement toward` the shank to maintain the latter in a substantially neutral freely-sliding position in the housing Without actually exerting pressure onfthe shank. f

2. A wrench comprising a fixed jawr and a movable jaw having a shank, a housing for said shank, a resiliently mounted guide member in said housing, and means for limiting the movement of said guide member toward said shank to give the shank a freely-sliding neutral mounting in the housing, while permitting a certain amount of rockingmovement. of the shankunder tension.

`.3. A wrench comprisingV a xedjaw and a movable jaw having a shank, a housing for said shank formed with a tapered back wall, a spring-pressed guide member in said housing, and means for limitingthe movement ofvsaid member toward the shank.

` 4L A wrench comprising a fixed jaw` and a movable jaw having a shank, a yhousing for said shank, a spring-pressed guide ,member in said housing, means for limiting movement of said member toward the shank to maintain the latter in a substantially neutral position in the housing, and a partly tapered back Wall on said housing to permit limited angular movement under tension of the movable jaw relatively to the xed jaw.

5. A Wrench comprising a fixed jaw and a movable jaw having a shank, ahousing for said shank, a partly tapered back wall on said housing, and a resiliently-mounted guide member in said housing having limited movement toward said shank.

6. A Wrench comprising a fixed jaw and a movable jaw having a shank, a housing for said shank, Va' spring-pressed guide member in said housing, and stop shoulders against which said member abuts, said shoulders being positioned so that the guide member and housing form a relatively snug sliding t for the shank without exerting a bearing pressure thereon.

7. A Wrench comprising a xed jaw and a movable jaw having a shank, a housing for said shank, and a spring-pressedrguide member in said housing, said guide member being housed in a cavity formed with stop shoulders which limit the movement of the guide member toward said shank, to provide a relatively snug sliding fit for the shank Without exerting a bearing pressure thereon.

8. A Wrench comprising a xed jaw and a movable jaw having a shank, a housing for said movable jaw, the body portion of the Wrench adjacent the xed jaw being formed With a longitudinally-extending cavity formed with stop shoulders, a spring-pressed guide member in said, cavity adapted to abut against said shoulders to provide a relatively snug sliding fit for said shank Without binding the latter, anda partly taperedback wall formed on said housing.

9. In a pipe' wrench, a movable jaw formed with a shank, a housing for said shank, a resiliently-mounted member having limited `movement toward said shank to provide a relatively snug sliding rit for the shank and maintain the latter in a substantially neutral position in the housing, and a partly tapered back Wall on said housing to permit limited angular movement of said jaw when applied to work.

10. In a pipe Wrench, a xed jaw and a movable jaw formed with a shank, a housing for said shank, a spring-pressed guide member mounted in the base of said housing, means for limiting the movement of said guide member toward said shank, and means for retaining said member against longitudinal displacement in the base of said housing.

11.,In a pipe Wrench, a iiXed jaw portion formed with a housing, a movable jaw formed with a shank adapted to have longitudinal movement in said housing, a spring-pressed guide Ymember forV said shank mounted in said housing and extending for substantially the full length of the housing, stop shoulders for limit- `ing the movement of the guide member toward said shank to Vgive the latter va relatively snug sliding iit in the housing without exerting bearing pressure on the shank to thereby maintain the latter in a freely-sliding neutral position in the housing, the back wall of the housing being partly tapered from the rear toward the front thereofV to permit limited angular movement of the movable jaw relatively to the iixed jaw.

12. In a pipe Wrench, a movable jaw and a iiXed jaw, a housing for the shank of the movable jaw, a recess formedV in the back wall of nso said housing, a longitudinal slot extending at substantially right angles to said recess defining stop shoulders, a guide member mounted in said slot, and a spring mounted in said recess for normally urging said guide member against said stop shoulders.

13. A pipe Wrench comprising a fixed jaw portion formed with a handle and a housing, al

movable jaw formed with a shank adapted to have longitudinal movement in said housing, the base of said housing being formed with a longitudnal slot, a spring-pressed guide member for

Images