US1567336A - Valve-reseating tool - Google Patents

Description

Dec. 29 '1925. 1,567,336

I 1. c. SHAW VALVE RESEATING TOOL Filed June 11. 1924 wlmsssa's wow-QM 7 BY ATTORNEY lie Patented Dec. 29, 1925.

UNITED STATES PATENT OFFICE.

IRA CLAYTON SHAW, OF INDIANA, PENNSYLVANIA, ASSIGNOR OF NE-HALF TO LYNN M. KELLY, OF INDIANA, PENNSYLVANIA.

VALVE-RESEATIN G TOOL.

Application filed June 11, 1924. Serial No. 719,400.

I '0 all whom it may concern:

Be it known that I, IRA C. SHAW, citizen of the United States, residing at Indiana, in the county of Indiana and State of Pennsylvania, have invented a new and useful Valve-Reseating Tool, of which the following is a specification.

This invention relates to a tool adapted especially for grinding globe valves and their seats when they have become worn or pitted in use, so as to provide a uniform fluid tight contact therebetween.

The general object of the invention is to provide a tool which is adapted to be used in connection with a valve holder or cage. and is provided with a set of interchangeable heads for grinding valves of different sizes.

The objects and advantages of the invention will be more fully set forth in the following detailed description taken in connection with the. accompanying drawings, which illustrate the preferred form of the invention.

In the drawings:

Figure 1 is a vertical sectional view of the invention as used in grinding a valve head.

Figure 2 is a sectional view of the tool and valve holder or cage taken on the line 22 of Figure 1.

Figure 3 is a perspective view of the grinding element and its stem constituting a part of the invention.

Figure 4 is a perspective view of a bush ing used in connection with the valve holder.

Figure 5 is a sectional view similar to Figure 1 but illustrating a valve of larger size.

The tool which constitutes the subject of the invention includes a rotatably supported stem 12 formed at its upper end with a noncircular extension 13 adapted to be received within the chuck of a bit brace, or other device used for rotating the same. The lower end of the stem 12 has a reduced threaded end 14 on which the grinding head 15 is adapted to be screwed. This grinding head has an inner concave face 16, and an outer convex face 17 of fine emery, or other material suitable for grinding the valve and its seat. The head 15 is reversible, and When attached to the stem 12 in the manner shown in Figure 3, is adapted to grind the valve head, and when attached the other side up is adapted to grind the seat of a valve of the next larger size. A number of different grinding heads may be used interchangeably with the same stein.

In grinding a valve head, the tool is used in connection with a cage or holder 18, the main portion of which is cylindrical and comparatively large, and may, if desired, have a portion of its sides cut away, as shown at 18. The lower end of the cage 18 is internally threaded to receive a bushing 19, as shown in Figure 1. The internal diameter of this bushing is of the proper size to receive the threaded end of a valve hood 20, which carries the stem 21 of the valve head 22 which is to be ground. Screws 28 are threaded horizontally through opposite sides of the cage 18, and are provided with winged heads 24:, by means of which they may be conveniently turned. The bushing 19 isprovided on its inner face with opposed notches 25 adapted to receive the inner ends of the screws 23, and thereby lock the bushing against displacement. After the bushing, the valve hood and valve have been placed in proper position within the cage 18, the inner ends of the screws 23 traverse the notches 25, and are brought into clamping relation to the valve head 22 and hold the same against rotation while it is being ground.

The upper end of the cage 18 has an internally threaded reduced extension 26 adapted to receive the hood 27, which may be of the next larger size than the hood 20, and the stem 12 is of the proper diameter to rotate freely and be guided within the hood 27. When the above described parts have been assembled, as shown in Figure 1, the valve 22 may be ground smooth by rotating the stem 12 and grinding head 15 by means of a bit brace or other suitable means.

In order to grind a valve of the next larger size, the bushing 19 i removed and replaced by a bushing 28, as shown in F igure 5, which has an internal diameter of the proper size to receive the hood 29 which carries the stem 30 of the valve 31, which is of the next size larger than the valve 22. In connection with this assembly, the grind ing head 15 is replaced by a similar grinding head of the proper size to fit the valve 31. If desired, the valve may be formed with notches 32 which, when the valve has been adjusted to the proper position to be ground, are in position to be engaged by the inner ends of the screws 23, thereby forming a positive check against rotation of the valve.

From the foregoing description, it will be seen that I have provided a tool for grinding valves and valve seats, which is of siinple construction, consisting of few parts, and which may be easily adjusted for valvesof different sizes, the hoods of the valves themselves being used in connection with the tool during the grinding operation. While I'have shown and described the specific details of construction, it is to be understood that these are merely illustrative, and that various modifications may be made therein without departing from the salient features'of the invention as herein claimed.

What is claimed is:

1. In a tool of the character described, the combination of a cage having internally threaded means at its lower end for receiving the threaded end of a valve hood with the valve disposed within the cage, means extending through the sides of the cage for clamping the valve head against rotation, a tool stein havinga valve grinding head at its lower end, and means at the upper end of the cage for rotatably supporting and guiding the stem with the grinding head in contact with the valve.

2. In a tool of the character described, the combination of a cage having at its lower end threaded means for engaging the threaded end of a valve hood with the valve disposed within the cage, means extending through the sides of the cage for clamping the valve head against rotation, means at the upper end of the cage for securing the threaded end of another valve hood, a tool stein slidably and rotatably guided in said last mentioned valve hood, and a grinding head secured to the lower end of said stem in position to grind the valve supported in.

gageable with the valve head to clamp the" same, a tool stem having a valve grinding head at its lower end, and means at the upper end of the cage for rotatably supporting and guiding the tool stem with the grinding head in contact with the valve.

In a tool of the'character described, the combination of a cage having a bushing threadedinto its lower-end and adapted to receive the threaded end of a valve hood with the valve disposed within the cage, said bushing having radial notches in its upper face, oppositely disposed means threaded through the sides of the cage and extending through said notches to lock the bushing and engageable with the valve head to clamp the same, means at the upper end of the cage for securing the threaded end of another valve hood, a tool stem slidably and rotatably guided in said last mentioned valve hood, and a grinding-head secured to the lower end of the tool stem in position to grind the valve supported in the first mentioned valve hood when the tool stem is so guided. I

5. In a tool of the character described, the combination of a valve-hood, means-for supporting a second valve hood in opposed relation to the other and in axial alinement, a

stein'slidably and rotatably. sup oorted in one of? said hoods, and a grinding ead car ried by'the inner end of said stem in position to operate ona valve mounted in the other hood.

In testimony that I claim the foregoing as my own I have hereto affixed my signature.

IRA CLAYTON SHAW.

Images