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Патент USA US2408450

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a Oct. 1, 1946.
R_ D_ scHRADER '
Filed March '24, 1944
' 2,408,450
Patented Oct; 1, 1946.
. r
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)
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
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:
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
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
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’
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