US2191692A - Pipe working tool - Google Patents

Description

Feb. 27,l 1940. A. s. GouLD Er A1.

` PIPE WORKING TOOL Filed March 16, 1939 2 Sheets-Sheet 1 rPa INVENTORS ARTHUR S. GOULD WILLIAM M. EMERY and RALPH E. HYDE Feb. 27, 1940. A. s. GouLD ET AL 2,191,692

PIPE WORKING TOOL Filed March 16, 1939 2 Sheets-Sheet 2 INVENToRs ARTHUR s. souLD w||.| |AM M. EMERY and BY RALPH E. HYDE a/. MM

' ATTORNEY.

Patented Feb. 27, 1940A lUNIT-:41) STATES" PATENT OFFICE PIPE WORKING TOOL Arthur S. Gould, Lakewood, William M. Emery, Cleveland Heights, and Ralph E. Hyde, Clevehnd, Ohio, assignors to The Oster Manufacturing Company, Cleveland, Ohio, a corporation .of Ohio Application March 16, 1939, Serial No. 262,214

6 Claims.

following purposes, although the recital of pur--l poses is not intended to exclude others not mentioned: f

15 To provide a stand of great rigidity but light weight; to afford support and protection for a motor-driven pipe chuck; to permit the use of a motor which is particularly suitable for such work but which requires ample ventilation; to furnish I a long-span steady rest for pipe being rotated by the chuck; to permit the use in power work of ordinary hand tools such as die stocks and cutters; to combine a maximum of protection and covering for all moving parts with complete accessibility for insertion and removal of work; to drive the chuck at the most advantageous point without sacriflce of length of bearings; to arrange the machinery compactly within the stand; and.I to obtain various further benefits and advanaotages which will be appreciated by those skilled in the art.

The following description is illustrative ofa preferred form without excluding such modifications and alterations thereof as come within the .principles of our invention.

In the accompanying drawings Fig'. 1 is a vertical longitudinal section substantially on the median axial plane of the chuck, with certain parts in elevation, the view except for elevational parts, being indicated by the plane I-I of Figs. 2 and 7, looking in the direction of the arrows;

Fig. 2 is a -vertical transverse section on the broken plane 2-2 of Fig. 1, with some parts in elevation, looking in the direction of the arrows; Fig. 3 is a perspective of the mounting bracket; Fig. 4 is a stand detail in section on the plane 4-4 of Fig. 2, in the direction of the arrows;

Fig. 5 is a front elevation of the apparatus ln operation, on a reduced scale;

Fig. 6 is a side elevation of the apparatus, on a further reduced scale;

Fig. '7 is a rear elevation of the apparatus, looking in the direction of the arrow 'I of Fig. 1 and showing one form of steady rest;

A(Cl. lil-89) Fig. 8 is the same view as Fig. 7, but showing a modified steady rest; and` Fig. 9 is a fragmentary view on the plane 9-9 of Fig. 8, showing the modied steady rest of Fig.- 8, omitting some interior features for sim- 5 plicity.

As best seen initially in Figs. 5 and 6 the preferred embodiment of our invention comprises a housing in the general shape of a truncated pyramid, with wide-spreading leg sockets II-II l0 and I2-I2 into which pipe or rodlegs may be inserted. The truncated pyramid is preferably a welded unitary structure with outwardly sloping sides I3, I4 and back I5, vertical V:front I6 and fiat top Il, with the rear legs I2 directly incor 15 'porated as both exterior and interior corner structure, as'best seen in Fig. 4. To increase the rigidity of the housing, and to protect the housed mechanism from below, the sides and ends are inwardly flanged as at 23, 24, 25 and 26; such 20 flanges, however, do not extend inward far enough to interfere with ventilation or with access from beneath. The leg sockets pass through such flanges and are welded thereto.

The mechanism housed consists of the chuck 26 3|, motor 32, and connecting gearing, and these are carried in a close and compact arrangement by a special bracket 33 suitably fastened beneath the flat top I1 and preferably slightly spaced therebelow by pads 34. This spacingis visible at 30 35, Figs. 1 and 2.

The chuck 3I consists in detail of a long sleeve 38 rotatable in a long bearing 39 in the bracket 33, and including at its forward end clamping arrangements such as studs 40 actuable by scroll 35 plate 4I having pin wrench sockets 42 which project forward through a clearance opening in the front I6. The sleeve 38 is suitably held against endwise movement, a shoulder 44 at one end and set ring 45 at the other being illustrated for this 40 purpose. A reverse flange 46 springing from the forward end of the sleeve carries a gear ring 41 by which the chuck receives power from the motor 32 through a gear box 48 and small pinion 49, here shown as having seven teeth. This gear 45 ring is especially protected from beneath by the flange 26.

'Ihe bracket 33 is a lunitary member stiffened by double sides 5I, 52 and cross webs 53, 54, 55, thus preserving the alignment of moving parts 50 and accuracy of gear engagement as well as alignment of the pipe by means of the studs 40 and a support 56 in the rear wall I5. 'I'he cross webs 53, 54 and the forward portions of the side walls 5I, 52 extend downwardly below the general level 55 of the rear part 'of the bracket. and join the chuck bearing 39 which extends considerably forward o! the web 53, and thereby permits certain advantages in the drive arrangement, as hereafter described.

Horizontal and vertical side lugs 51 and 58, integral with and extending from the side 5I at rear and front respectively afford support for the motor 32 and gear box 46, thus disposing the motor shaft, the reduction gearing, the pinion 49, and the chuck sleeve 38 all in paraxial relationship.

Among the advantages of keeping the pinion small are that the motor can be placed with shaft parallel to the spindle axis, which enables the use of side-meshing gears throughout, avoiding circulation of air to the motor 32 for cooling.

All this is advantageous in a portable outt which must be taken from place to place and set up in small spaces.

A particular benet in respect to the motor is that a series wound motor is best for this sort of work, but requires ample ventilation. The advantage of the series motor is that as the load increases the power increases but the speed reduces. It will thus turn a large pipe at fewer revolutions per minute than a small one, withy the result that the foot/minute cutting speed is approximately constant irrespective of the size of pipe being worked. The necessary ample ventilation for such a motor is obtained by keeping the bracket out of the way and by having the stand wide open at the bottom although it is stiiiened by the anges 23 to 26 and the gear 41 is protected by the ange'26.

A steady rest for pipe, rod, or the like P being I worked is provided at the aperture in the rear wall I5. 'I'his may take the 4form of the Y 56, with a wide horizontal pipe-contacting face at 60, and holding-down nger 6I, both adjustable up and down upon the rear wall I5. An alternative form shown in Figs. 8 and 9 consists of a plate 65 pivoted at 66 upon the rear wall I5 below the aperture and having a series 0f elongated holes 61 corresponding to usual pipe sizes, which can be brought into central alignment with the axis of chuck 3| by rotation about the pivot 66, and latched in place by the latch 68 in notches 69. The plate 65 is of substantial thickness, and the edges of the holes 6'I are formed at the proper angle to give a broad horizontal edge such as 'Il for the pipe or other workpiece. The plate 65 may carry index numbers adjacent the latch notches 69 to indicate the pipe size for which set. It is intended that the pipe, rod or the like being rotated in the spindle will t the rear support with easy tolerance and turn therein with ,little friction, and oil can readily be applied thereto if needed.

Side bars 70, slidable endwise in eyes I2 welded to the stand structure, are useful as carrying handles, and serve as stops for cutters, die stocks or other tools 'I'. Figs. l and 5, working on a pipe, rod or other revolving workpiece P.

On Vaccount of the rigidity of mounting of the spindle and motor the weight of rearwardly overhanging work can never throw the gearing out of alignment, but it is nevertheless desirable to keep the work lined upacross as long a span as is readily available, and inthe present vstand this is accomplished over a span considerably greater than spindle length bymeans oi the rear guides or steady rests. Such steady rests are carried by the rigid box-like stand body, and not upon any outside foundation and consequently are aligned with the chuck jaws as long as the stand is not distorted from its shape; this is because the chuck Jaws are also aligned with the stand body inasmuch as the bracket of- Fig. 3 is secured to such body. The stand is a compact, sturdy and rigid unit, which may be put'on a bench, but the more usual use will be to put pipes into the leg sockets to bring it to proper height. Even if the pipe leg extensions are somewhat yielding, any workpiece supported between the chuck jaws 4I and the rear steady rest forms part of a rigid system with they stand organization, and the parts of the organization are not changed in their relations to one another even if the pipe legs wobble. Thus good and accurate work cannbe done by the mechanism even if the stand is indiilerently supported.

Our stand is chiey intended for use in portv able sizes, such as can readily be carried by two men. It might of course be put on a wheeled `carriage or on a bench. An electric-motor is the preferred drive although other power might be substituted. Electrical switches, connections, speed controls and so on will be of appropriate character and are not illustrated.

'I'he chuck and rear steady rest being below o instead of on top of the table I1 gives a longer span for support of the pipe on account of the spread of the back: wall I5. Furthermore it leaves the top II clear for attachment of a vise or other tool (not shown) for use as a workbench, and so on.

'Ihe foregoing description and the drawings therewith are disclosures of preferred embodiments of our invention, not intended to exclude modifications which apply the same principles.

We claim:

1. A cutting and threading tool comprising in combination a support, a bracket dependent therefrom, said bracket comprising a relatively shallow cantilever portionand longitudinally spaced downwardly directed webs, a bearing having its front end integral with the forward one of said webs, and itsrear end integral with the back one of said webs, a side lug formed on the rear end of said cantilever, and another side lug formed on said first-named web, said lugs constituting a motor support, a rotatable chuck in said bearing and a driving motor for said chuck supported by said lugs, drivingv connections from said motor to said chuck, means connecting the said bracket tosaid support at the forward web and at the rear of said cantilever, protective skirts downwardly directed at the sides of said support, edges dening openings in said skirts at front and rear, the front opening providing clearance for chuck clamping mechanism and the rear opening providing entrance for a work piece, and inwardly directed flanges underneath said skirts underlying all exposed moving parts of said driving connections.

2. Apparatus of the character described comprising in combination a stand including a top plate and support therefor, a bracket beneath said plate, said bracket consisting of a top arm secured to said plate and a vertical downward arm at one end of said top arm, a horizontl side lug at the other end of said top arm, a vertical side lug upon said downward arm on the same side as said horizontal lug, paraxial bearings in said vertical arm and said vertical lug respectively, a revoluble chuck in the bearing in said downward arm and a drive shaft for said chuck in the bearing in said vertical lug.

3. Apparatus of the character described comprising incombination a frusto-pyramidal stand and a unitary cast suspension element supported therein, a chuck and drive means for the same carried by said suspension element above the level of the bottoms of the sides of said stand, said chuck including a scroll plate having a handle exposed through a side of said stand, and side bars supported on said stand and adapted to extend beyond said stand to engage a tool upon a work piece held by said chuck.

4. A pipe working bench comprising in combination a top and walls comprising a substantially frusto-pyramidal structure, diverging legs in said structure, a work turning chuck supported beneath said top, work engaging jaws in said chuck near the front wall of said structure, a work steadying device near the back wall of said structure, said device comprising a disk, a pivot connecting said disk to said rear wall of said structure, a plurality of apertures in said disk tted to specific pipe sizes, and locking means for selectively positioning any of said apertures in central axial alignment with the axis of said chuck.

5. A pipe working bench comprising in com- Xchuck near the front wall of said structure, a

work steadying device near the back wall of said structure, said device comprising a disk, a pivot connecting said disk to said rear wall of said structure, a plurality o f apertures in said disk tted to specic pipe sizes, and locking means for selectively positioning any of said apertures in centrall axial alignment with the axis of said chuck, and indicia operatively related to the locking means for said disk, thereby indicating the pipe size for which the disk is set.

6. A pipe working machine comprising a truncated pyramidal four sided housing, the smaller top end being closed and the larger bottom being open, sockets near the corners thereof adapted to receive supporting legs, a casting attached to the inside of the top, a motor and gear reduction aligned 4and positioned by said casting, a gripping chuck including a hollow spindle with a large gear fast thereon journalled in said casting and aligned to mesh with said gear reduction, said chuck extending through one side of said truncated pyramid, and means supported by said pyramid substantially parallel to said spindle to resist the turning with the pipe of tools upon the pipe, but allowing movement of said tools longitudinally with the pipe.

ARTHUR S. GOULD. RALPH E. HYDE. WILLIAM M. EMERY.

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