US 2094225 A
Description (OCR text may contain errors)
Sept. 28, 1937. J. l.. TUTTLE 1 TOOL Filed July 6, 1955 2 Sheets-Sheet l INVENTOR is /LJ/flg 04 Qmh TTORNEY Sept 28, 1937- J. L. TUTTLE 2,094,225
Filed July 6, 1935 2 Sheets-Sheet 2 llllll n AT ORNEY Patented Sept. 28, 1937 UNITED .STATES s PATENT OFFICE TOOL `less L. Tuttle, Oakland, Calif.
Application Julyy 6, 1935, Serial No. 30,107
1 Claim. (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 structure diclosed in my prior` application, Serial Number 11,635, filed March 18, 1935.
It is an object of the invention to providea device, of the character described, in which the chuck jaws, which `are provided for holding-'the 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 diliicult to hold may be chucked.
Still another object ofthe invention is to pr vide fortwo independent ranges of feed for the cutters.
A further object of the invention is to provide for the ready interchangeability of the cutter heads. i I
Still another object of the invention is to pro-k` vide improved means for simultaneously moving the chuck jaws radially which insures that the work is centered with the axis of rotation of the cutter head. Y
The invention possesses other objects and features of advantage, some of which, together with the foregoing, will be pointed outl in the detailed description of the invention following, however it is to be understood that I do not wish to be limited to the form of the invention, as herein described, as other embodiments-thereof may be employed within the scope of the appended claim.
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 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 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 indieating the direction in which the View is taken. Figure 5 is a longitudinal vertical sectional 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 a frame having an annular chuck plate `'l and a hub 8 joined therewith by means of a plurality of arms 9. Oneof 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. v
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, eachof the grooves I2 and is provided with an aperture I5 in axial alinement with the slot I3.
in which is rotatably mounted a cam disk I8 having spiral slots I9 formed therein, which overlie 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 apertures 22 are provided adjacent the periphery of the disk which are engageable by the pins of a spanner Wrench shown by the dot and dash lines 23 of Figure 2; and to provide for temporarily locking the parts against movement, a bolt 24 is positioned in the chuck plate near the periphery of the cam disk and is tted 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 theresurf'acing 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 advantage of this fact by cutting on the ends of each chuck jaw, threads 26 which correspond, in pitch, to the threads of the ttings, and to compensate for the slight difference inv helix angle between the threads of the chuck jaws and those of the different ttings, I notch each jaw at the points 21 thereby providing thereon a pair of The face I6 of the plate is provided with a circular recess Il 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. central bore 29 in which is rotatably journaled a shaft 3B having at the end thereof adjacent the chuck, a threaded stud extension 3l and at its outer end with a transverse aperture 32 which receives one end of a bent rod providing a crank 33 for rotating the shaft. A setscrew 34 tapped axially into the end of the shaft and engageable with the flattened portion 35 of the crank provides means for securing the latter to the shaft.
Mounted on the stud 3l is a cutter head comprising a rectangular block 3S provided on each side with notches Si, parallel with the axis of the shaft, for receiving cutters 35 which are secured in the notches by means of setscrews 39. It will be noted that each side of the block is positioned at different distances from the center of the shaft, as consequently are the notches, 5l, so as to provide different orbits of rotation of the cutters 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 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 conned between the shoulder 43 of a feed nut dit, which is threaded on the hub 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 the cutter is allowed to remove from fitting lil is regulated by the amount that 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 operator. 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 operations 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 jaw. The lower face of each block is notched s 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 engagement with the head 53 of the valve body, and the cutter block 36 has been replaced by an' extension bar 54 which is fitted with a threaded bore 55 engaging the stud 3l of the shaft 30. The outer end of the bar`54 is provided with a transverse rectangular aperture for receiving a cutter 56 and a set-screw 5l is provided in the end of the bar for locking the cutter in position. By means of this set-up of the parts deep seated boring or refacing operations may be accomplished within the range of the amount of axial movement of the shaft 3i?. Operations beyond this range can, of course, be accomplished by substituting for the extension bar 54 others of 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 ttings, providing for reseating of the joints between the halves of unions, recutting valve seats, turning and facing the ends of pipes preparatory to sweating ttings 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 tting.
The fact that the device is portable and may be attached to the vise of a plumbers 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 shop.
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 alinement with said plate, a cutter on sai-d shaft, said plate having a plurality of radial grooves therein and an elongated slot opening into each of said grooves at the bottom thereof, a chuck jaw slidably disposed in each of said grooves and provided with an aperture in registry with said slot and a segmental screw-thread at the end thereof 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 limiting the axial movement of said shaft.
JESS L. TUTTLE.