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Патент USA US2094225

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Sept. 28, 1937.
' J. l.. TUTTLE 1
Filed July 6, 1955
2 Sheets-Sheet l
Sept» 28, 1937-
Filed July 6, 1935
2 Sheets-Sheet 2
llllll n
Patented Sept. 28, 1937
c 2,094,225
`less L. Tuttle, Oakland, Calif.
Application Julyy 6, 1935, Serial No. 30,107
1 Claim. ì (Cl. 82-1)
T_his invention relates to a portable machine for
use by pipe-litters or plumbers in repairing leaky
fittings or reseating valves, and the invention is
directed particularly to improvements over the
5 structure diclosed in my prior` application, Serial
Number 11,635, filed March 18, 1935.
It is an object of the invention to provide’a de
vice, of the character described, in which the
chuck jaws, which `are provided for holding-'the
10 work, may be made to function as a die for reno
Vating battered or encrusted threads on thework.
Another object of the invention is to provide for
mounting adapters on the jaws of the device so
that objects which are ordinarily very -dilîiicult
to hold may be chucked.
Still another» object ofthe invention is to pr vide fortwo independent ranges of feed for the
A further object of the invention is to provide
20 for the ready interchangeability of the cutter
Still another object of the invention is to pro-k`
vide improved means for simultaneously moving
the chuck jaws radially which insures that the
25 work is centered with the axis of rotation of the
cutter head.
a frame having an annular chuck plate `'l and a
hub 8 joined therewith by means of a plurality of ’
arms 9. One- of the arms, as is shown in Figures
1 and 5 is provided with a web extension I0 so as
to permit the frame to be mounted between the
jaws of a vise indicated by the 4dot and dash
lines I I.
The chuck plate is provided with preferably
three radially disposed grooves I2 at the bottom
of each of which is formed an elongated slot I3
opening through the back wall of the plate. A
chuck jaw I4 is slidably mounted in, each‘of the
grooves I2 and is provided with an aperture I5 in
axial alinement with the slot I3.
of the plate is provided with a circular
face Il
I6 ~‘~
in which is rotatably mounted a cam disk I8
having spiral slots I9 formed therein, which over
lie the slots I3 of the chuck plate, and a bolt 20
passes through each slot of the cam disk, aperture
I5 of the chuck jaws, and slot I3 of the chuck
plate, and is provi-ded with a nut 2I which, when
tightened, will lock the cam disk against rotation
and the chuck jaws against movement axially
in their grooves.
To facilitate rotation of the cam disk spaced 25
apertures 22 are provided adjacent the periphery
The invention possesses other objects and
features of advantage, some of which, together
with the foregoing, will be pointed outl in the de
of the disk which are engageable by the pins of
a spanner Wrench shown by the dot and dash lines>
, tailed description of the invention following,
locking the parts against movement, a bolt 24 is
positioned in the chuck plate near the periphery
however it is to be understood that I do not wish
to be limited to the form of the invention, as here
in described, as other embodiments-thereof may
be employed within the scope of the appended
Referring to the drawings:
Figure 1 is a longitudinal vertical sectional view
of the machine of `my invention.
Figure 2 is .an end elevation of the device of
40 Figure 1; the direction in which the View is taken
being indicated by the arrow 2 of the latter figure.
Figure 3 is a transverse sectional view showing
the locking means between the shaft and the feed .
nut. 'I'he plane of section in which this View is
45 taken is indicated by the line 3-3 of Figure 1.
Figure 4 is an end elevation of the device of
Figure 1; the arrow 4 of the latter figure indi~
eating the direction in which the View is taken.
Figure 5 is a longitudinal vertical sectional
50 view, similar to Figure 1 except that parts of the
former figure are shown in elevation, showing the
set-up of the device for a reseating operation.
Figure 6 is a perspective View of one of the
chuck jaws and its adapter.
In detail, the tool of my invention comprises
23 of Figure 2; and to provide for temporarily
of the cam disk and is ñtted with a wing nut 25
by means of which the disk may be clamped in its
recess and, due to its connection, by means of the
bolts 20, with each of the chuck jaws, thereby also
prevent movement of the jaws.r
Since the majority of the parts to be resurfaced,
such as valve bodies and sections of unions, are
threaded adjacent the points where the‘resurf'ac
ing operations are to be performed, I provide
means on the chuck jaws for gripping the threads
so as to insure, since` the threads are axially
alined with the surfaces to be re-cut, that the
finished seat will match exactly with'its mating
part. Most all fittings, within a given range of
sizes, are provided with standard threads, in' other
words, the pitch of the threads is the same re-'
gardless of the diameter of the part. I take ad
vantage of this fact by cutting on the ends of
each chuck jaw, threads 26 which correspond, in
pitch, to the threads of the ñttings, and to com
pensate for the slight difference inv helix angle
between the threads of the chuck jaws and those
of the different ñttings, I notch each jaw at the
points 21 thereby providing thereon a pair of m
narrow extensions 28 which not only provide for
better gripping of the threads of the fittings but
also allow the jaws to receive fittings having a
wide range of thread diameters.
The hub 8 of the frame is provided with a. cen
jaw. The lower face of each block is notched sò
as to provide a pair of spaced pads 52 which are
preferably knurled so as to enhance the gripping
powers of the blocks.
In Figure 5 I have shown the set-up of the tool
for performing a reseating operation on a valve
body 53. As will be noted the blocks 49 are in
chuck, a threaded stud extension 3l and at its
engagement with the head 53 of the valve body,
outer end with a transverse aperture 32 which
and the cutter block 36 has been replaced by an'
lO receives one end of a bent rod providing a crank
extension bar 54 which is fitted with a threaded
33 for rotating the shaft. A setscrew 34 tapped bore 55 engaging the stud 3l of the shaft 30. The
axially into the end of the shaft and engageable outer end of the bar`54 is provided with a trans
with the flattened portion 35 of the crank provides » verse rectangular aperture for receiving a cutter
means for securing the latter to the shaft.
56 and a set-screw 5l is provided in the end of
Mounted on the stud 3l is a cutter head com
the bar for locking the cutter in position. By
prising a rectangular block 3S provided on each means of this set-up of the parts deep seated
side with notches Si, parallel with the axis of the boring or refacing operations may be accom
shaft, for receiving cutters 35 which are secured plished within the range of the amount of axial
in the notches by means of setscrews 39. It will movement of the shaft 3i?. Operations beyond
20 be noted that each side of the block is positioned
this range can, of course, be accomplished by
at different distances from the center of the substituting for the extension bar 54 others of
tral bore 29 in which is rotatably journaled a
shaft 3B having at the end thereof adjacent the
shaft, as consequently are the notches, 5l, so as
to provide different orbits of rotation of the cut
ters to accommodate varying diameters of work.
Means are provided for regulating the axial
movement of the shaft 3@ so that the amount of
material removed from an object, such as the
tubular fitting d@ shown secured by the chuck
jaws in Figure l, may be controlled. The shaft
30 is, adjacent its outer end, provided with a pair of
spaced peripheral grooves 4l, either of which is
adapted to receive the two sections of a split ring
42. This ring is conñned between the shoulder
43 of a feed nut dit, which is threaded on the hub
35 8, and the end of a nut @l5 threaded into the end
of the feed nut.
It is evident that, being locked
against axial movement in the feed
the shaft
30 cannot be advanced other than by rotation ef
the feed nut. Thus the amount of material
which ¿lil
theis cutter
is allowed
by the amount
to remove
the feed
nut is advanced. As will be seen in Figure 5, the
peripheries of the feed nut 4d and the nut [i5 are
knurled so that they may be gripped by the opera
The purpose of the second groove on the
shaft is to provide for the extension of the range
of axial movement of the shaft for certain deep
boring operations, this being done by releasing the
nut ¿i5 from the feed nut whereupon the shaft Sii
may be moved axially outwardly so as to bring
the split-ring out of the latter nut whereupon it
may be placed in the outer groove, the shaft again
moved axially to return the split-ring into the
feed nut and the nut 45 replaced, thus effecting
a shifting of the shaft an amount equivalent to
the spacing between the grooves 4l.
In Figures 5 an-d 6 I have shown means whereby
fittings which are not conveniently provided with
threads adjacent the scene of the refacing oper
ations may be chucked. Each chuck jaw I3 is
provided adjacent its inner end with a pair of
spaced holes -46 and, between them, a tapped
hole 4l. The former holes are adapted to receive
dowel pins 48 secured in blocks 49 which are
provided with an aperture 5B, in alinement with
the tapped hole 47 for receiving a screw 5| which
is provided for securing the block to the chuck
greater length.
Using the tool of my invention, with the various
attachments described, enables a workman to
perform most any job of repairing leaky or Worn
valves or ñttings, providing for reseating of the
joints between the halves of unions, recutting
valve seats, turning and facing the ends of pipes
preparatory to sweating ñttings thereon, and, as
is evident in Figure l of the drawings, the act of
screwing the fitting out of engagement with the
set chuck jaws, serves to clean out and remove
any burrs from the threads of the ñtting.
The fact that the device is portable and may
be attached to the vise of a plumber’s portable
bench enables it to be brought to ‘the job to be
done, thereby effecting a material saving in time.
In addition to this the device will accomplish all
nature of repair work on valves and fittings which
heretofore required the use of a lathe with the i
subsequent waste of time occurring during the
trips of the workman between the job and the
I claim:
>In a tool of the character described, a frame
having an annular plate at one end thereof and
a hub at the other end thereof for mounting for
rotary and axial movement a shaft in axial aline
ment with said plate, a cutter on sai-d shaft, said
plate having a plurality of radial grooves therein 50
and an elongated slot opening into each of said
grooves at the bottom thereof, a chuck jaw slid
ably disposed in each of said grooves and pro
vided with an aperture in registry with said slot
and a segmental screw-thread at the end there
of for engaging the threads of a threaded object
to be chucked and mating with said threads, a
disk journaled in said plate and overlying each
of said chuck jaws, said disk having a plurality
of arcuately disposed slots therein in registry
with the slots of said grooves _and the apertures
of said chuck jaws, a bolt passing through each
of said arcuate slots, chuck jaw apertures and
groove slots, and means on said frame for limit
ing the axial movement of said shaft.
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