US2242821A - Reaming tool - Google Patents

Description

May 20, 1941. R, B. FANsLow 2,242,821

REAMING TOOL `Filed Sept. ll, ,1959

1N VENTOR.

ATTORNEYS- Patented May 20, 1941 REABIING TOOL Robert B. Fanslow, Rockville Centre, N. Y., as-

signorto The Imperial Brass Manufacturing Company, Chicago, lil., a corporation of Illinois y Application September 11, 1939, Serial No. 294,356

(Cl. 'TZ-73) 6 Claims.

My invention relates to Teaming tools and particularly the type of Teaming tool which is customarily used to trim the ends of pipe and tubing.

An object of my invention is the provision of a new and improved Teaming tool which is of rugged construction, simple Vin design, and relatively inexpensive to manufacture.

Another object of my invention is to provide a new and improved Teaming tool of substantially light-weight construction which is braced and reenforced by an internal diaphragm member so that blades of metal most suitable for cutting purposes can be mounted in the tool without it being necessary to utilize the blade structure for supporting the cutting portions of the tool.

Stillanother object is the provision of a new and improved outside and inside Teaming tool wherein the cutting portion of the tool is surrounded by a casing providing a hand grip for the tool and which at the same time serves as a protective guard covering the cutting portions of the tool.

With these and other objects in view, my invention consists in the construction, arrangement and combination of the various parts of my device whereby the objects contemplated are attained, as hereinafter more fully set forth, pointed out in my claims and illustrated in the accompanying drawing, in which:

igure l is a longitudinal sectional View of my device taken on the line I-I of Figure 2.

Figure 2 is a bottom view of my device as viewed in Figure l.

Figure 3 is a detailed view of one of the cutting blades.

In the manufacture of Teaming tools it is of course the aim and purpose to supply a tool of very light construction so that it can be easily carried about bythe mechanic butone at-the In order to make one tool suitable for all sizes and at the same time small, convenient and easy to manipulate, a special and simplied construction is found desirable.

It has been found that the needs of this construction are met in some instances very readily by a casting and particularly a die-casting wherein all parts of the tool can be made in tegrally with the die-cast metal forming the body of the tool and blades of hardened steel forming the cutting elements, embedded in and cast integrally with the body.

An embodiment of my invention shown in the drawing utilizes this principle of construction though it is not to be considered that the invention is limited to such a particular kind of construction since others following the principle of my device can be used to good advantage.

In the embodiment chosen for the purpose of illustration there is shown a body l0 in which is mounted a plurality of reaming blades l2 which are positioned in the body in a slanting direction. Both the forward edges I4 and the rearward edges I6 of the blades are sharpened so that the tool may be used to trim the outside or the inside of a cut end of pipe or tubing.

vThe body Il! is provided further with a conical diaphragm i8 having a base 20 near one end 22 of the body and an apex 24 nearanother end 26 of the body. It will be noted also that the cylindrical wall 28 adjacent the end 26 is relatively thin in cross section while the cylindrical wall 30 adjacent the end 22 of the body is of substantially thicker construction.

When the body is cast the blades l2 are mounted in the casting in the positions shown in Figures l and 2. The blades, as will be noted, are provided with a hole or aperture 32 at one end so that they will always be placedV with the appropriate endfdownward as Viewed in Figure l. The metal in molten form is then poured into the mold and around the blades and there per-` mitted to solidify. By reason of the fact that the walls 39 are relatively thick they form an an-v choring means for the base ends of the blades.

Moreover, theblades are completely embedded within the conical diaphragm I3l to suchaneX- tent that the edges I6 lprotrude on one*y sideand the edges It on the other side. All the blades are joined together at the apex of the diaphragm in a point 34. 'Ihe blades, of course, extend .beyond the surface of the conical diaphragm on both sides.

When the metal is cast about the blades in a molten state, some of it will iill the hole 32 and y there solidify, thus adding greatly to the stability may on occasions serve to pass chips scraped from the ends of tubing.

The particular blade construction is to be noted. On the forward cutting edge for the inside of the tubing, the blade has two sharp cofrners adjacent each of the two lateral faces. Therefore, regardless of the size of the tubing, one edge or the other will be bound to come into contact with the inside edge of the tube and the reaming tool can be rotated in either a right hand or left hand cutting direction when reaming out the inside of a tube.

At the opposite edge I6, the blade is provided for example with a ten per cent pitch. When the outside wall of a tube is brought into contact with the outside reaming cutters then the cutting corner of the edge I6 is the` only point of contact with the tubing Wall. One corner of the edge will be in contact with the tubing end and the tool is rotated in a right hand direction, in the embodiment shown to trim the contacting end of the tubing.

It will be noted that a diaphragm here shown in conical shape closes the space between adjacent blades except for the small holes 36 previously indicated. This feature is desirable since it is frequently necessary to ream tubes of relatively small diameter and When these are inserted in a large reaming tool, they are so small that the end of the tube is frequently projected inadvertently between adjacent blades rather than in its proper position contacting the cutting edges of Vall the blades. By providing a dia phra-gm it is impossible to accidentally position small tubes in the Wrong place. The diaphragm further supplies a reenforcement for the walls, and a sturdypmounting for the blades which are exposed on either side of it.

Some changes may be made in the construction and arrangement of the parts of my device without departing from the real spirit and purpose of my invention, and itis my intention to cover by my claims any modied forms of structure, or use of mechanical equivalents, which 'may be reasonably included Within their scope.

I claim as-my invention:

1. A reaming tool for tubing comprising a hcllow body, a diaphragm within the body having the ibase thereof supported by the body adjacent one end thereof and tapering to an apex adja` cent the other end of the body, and a knife supported by the tapered diaphragm extending along one side thereof` adapted to trim the edge of an end of tubing.

2.Y A reamingtool for trimming the edges of tubing ends comprising a cylindrical body, a substantially conical diaphragm within the body intermediate the ends having Athe base thereof supported by the body near one end and the apex thereof near the other end of the body, and a plurality of knives mounted on the sides of the diaphragm extending along the sides thereof from the apex toward the base, said knives having sharp edges for trimming the ends of tubing rotated in contact With them.

3. A reaming tool of integral construction for trimming the ends of tubing comprising a substantially hollow cylindrical Ibody, a substantially conical diaphragm within the body having a base cast integrally with the walls of the body near one end and an apex near the other end, and a plurality of individual hardened knife blades' permanently embedded in the walls of the diaphragm extending from the apex to the base and projecting beyond the surface of the diaphragm on each surface thereof, the edges of said blades on both sides of the diaphragm being sharp for the purpose of trimming the end of a piece of tubing at the inside and outside edge.

4. A reaming tool of integral construction for trimming the ends of tubing comprising a substantially hollow cylindrical body, a substantially conical diaphragm Within the body having a base integral with the walls of the body near one end and an apex near the other end, and a plurality of individual hardened knife blades permanently embedded in the walls of the diaphrag-m extending from the apex to the base and projecting beyond the surface of the diaphragm on each side, the edges of said blades on both sides of the diaphragm being sharp for the purpose of trimming the end of a piece of tubing at the inside and outside edges, said blades having each a hole at one end i'llled with metal comprising the diaphragm for keying said blades in place.

5. A reaming tool for trimming the ends of tubing of various sizes comprising a cylindrical body with the Wall thereof forming the outside of the' tool and a plurality of blades having one end of each secured permanently in said wall in circumferentially spaced relation and the other end of` each terminating in a point adjacent the ends of the other blades, said blades having the edges o-n each side thereof sharp for reaming the inside and outside of tubing, the walls of said body being adapted to furnish a hand grip for holding the tool, said hand grip extending around the blades in protective relation thereto.

6. A reaming tool for trimming the edges of tubing ends comprising a cylindrical body, a substantially conical diaphragm Within the body having the base thereof supported by the body near one end and the apex thereof near the other end of the body, and a plurality of knives mounted on the sides of the diaphragm extending along the sides thereof from the apex toward the base, said knives having sharp edges for trimming the ends of tubing rotated in contact with them, said diaphragm having a series of passages therethrough, each surrounding a blade at a position slrbstantially midway between the ends thereof.

ROBERT B. FANSLOW.

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