Патент USA US2408450код для вставки
a Oct. 1, 1946. R_ D_ scHRADER ' BROKEN STUD REMOVER Filed March '24, 1944 ' 2,408,450 Patented Oct; 1, 1946. V . r 2,408,450 UNITED STATES PATENT OFFICE BROKEN STUD REMOVER Raymond D. Schrader, Peoria, 111., assignor to V. Ray Van Wey, Pekin, Ill. ' Application'March 24, 1944, Serial No. 527,983 _ 1 Claim. ' (01. 81-71) 1 The present invention relates to new and use ful improvements for removing broken studs from engine blocks and other places where the ceiving a wrench or other tool for threading the sleeve into and out of the opening in the bridge member. A screw 15 is threaded through the sleeve I3, said screw having a polygonal head Is for the bolt or stud has been broken off below the surface of the block. . . An important object of the present invention is to provide a screw-threaded member having a reception of a wrench or like tool. Mounted in threaded engagement on the screw I 5 is a nut bit formation at its lower end and adapted to bite I1 which is adapted'to engage the head of the . into the end of the broken stud and also to pro: Sleeve I3, and thereby augment the latter’s re-' vide means for rigidly supporting the screw 10 .sistance to pressure. threaded member While the same is engaging the The lower end of the screw I5 is formed with broken stud and while the screw threaded mem a head l8 adapted to bite into the top of the bro ber and stud are being removed. ' ken stud ‘! and to ?rmly engage the broken stud A further object is to provide a device of this to remove the latter from the bolt holes 6 by a character of simple and practical construction,v 15 retracting movement of the sleeve 13. which is e?icient and reliable in performance, relatively inexpensive to manufacture, easy to operate and otherwise well adapted- for the pur It will also be understood that the screw l5 and sleeve l3 may be constructed of various sizes‘ for use in extracting or removing various sized poses for which the same is intended. . broken studs. Other objects and advantages reside in the de 20 It will be apparent that the device of the pres tails of construction and operation as more fully ent invention may be employed e?ectively on any hereinafter described and claimed, reference be broken o? stud regardless of the pitch of the ing had to the accompanying drawing forming threads thereon. Likewise, it is effective for the part hereof, wherein like numerals refer to like removal of any broken o?.’ stud irrespective of parts throughout and in which—— 25 whether such stud be ?ush with the plane surface Figure 1 is a fragmentary vertical sectional of the block, or countersunk in the block, or with view of an engine block showing the tool in posi- ‘ its end protruding from the block, and without tion for removing a broken studtherefrom and requiring any prior drilling or like action there with parts of the tool shown in section, on. Furthermore, it is obvious that this device 30 may be used for the insertion of bolts or screws ~ Figure 2 is a top plan view, . Figure 3 is a perspective view of one of the into position in blocks where the conventional means for such positioning can not be employed. It is believed the details of construction, oper ation and advantages of the device will be readily spacing members, and Figure 4 is an end elevational view of the bro ken stud removing member. Referring now to the drawing in detail Where 35 understood Ifrom'the foregoing without further detailed explanation. ' in for the purpose of illustration I have dis closed a preferred embodiment of the invention, Having thus described the invention, What I "the numeral 5 designates an engine block having claim is: l the threaded tap or bolt holes 6 therein for secur A broken stud remover comprising a bridge ing the engine head (not shown) in position. 40 member, slots in each end- of said bridge mem The numeral 1 represents a stud or bolt which ber, bolts positioned in said slots and adapted has been broken off in one of the bolt holes 6. In carrying . out my invention bolts 8 for securing said bridge member to the work at opposite sides of a broken stud to be removed from said work, removable spacing members on are threaded in the opening 6 at opposite sides of the broken stud ‘I and positioned on the bolt and rest 45 the bolts for spacing said bridge member above ing on the top of the engine-block are spacing the work, a threaded opening in said bridge mem spools 9 on which are supported the ends of a ber intermediate its ends, an internally and ex- ' bridge member II], the bridge member having ternally threaded sleeve threaded in said opening slots II in its end portion for adjustably receiv and having a tool engaging head for threading ing the bolts 8 and the bridge member is secured 50 the sleeve into and out of position, a screw in a ?xed position by the head of the bolt. threaded in said sleeve and having a tool engag The bridge member is also formed with a cen ing head at one end and means at the other end tral threaded opening l2 adapted to receive an of the screw adapted for biting into the broken internally and externally threaded sleeve l3 hav ing a hexagonal head I4 at its upper end for re’ stud. 55 RAYMOND D. SCI-IRADER.