US2087527A - Valve reseating tool - Google Patents

Description

Patented July 20, 1937 UNITED STATES PATENT OFFICE 2 Claims.

The object of my invention is to provide a valve reseating tool of simple, durable and inexpensive construction which, in operation, will not gouge intoI the valve seat being operated upon, and which will not tend to jump out of contact with the valve seat and produce what is commonly called a chattering effect.

A further object is to provide means of simple, durable and inexpensive construction whereby a valve reseating tool may be conveniently and easily applied to a valve, and which will provide means whereby the operator may readily and conveniently, from time to time, apply the desired amount vof pressure to the reseating tool and against the valve seat for the maximum efficiency of cutting action.

My invention consists in the construction of the valve reseating tool and in the relative arrangement and combination of the cutter blades relative to each other and 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:

Figure 1 shows a Vertical central sectional view of a valve having my reseating tool applied thereto as in practical use;

Figure 2 shows a detail sectional view on the line 2-2 of Figure 1.

Referring to the accompanying drawing I have used the reference numeral I0 to indicate generally the body of a valve of the kind with which my improved rese-ating tool is used. This valve has a detachable bonnet II with a screwthreaded interior opening I2, and it also has a stuffing box I3 detachably mounted on its upper end. The valve seat is indicated generally by the reference numeral I4.

My improved reseating tool comprises a stem I5, to the lower end of which is iixed a cutter head I6. This stem I5 is smooth and straight and has a squared portion I1 at its upper end. Slidingly mounted upon the stem I5 is a sleeve I8, to the lower end of which is xed the cone I9, and the upper end of which is screwthreaded at 20. A second cone 2l is screwed to the threaded portion of the upper end of the sleeve I8, and when the implement is applied to the valve, as shown in Figure 1, the cone 2I is adjusted until it enters and fits into the lower end of the screwthreaded opening in the interior of. the bonnet. The upper end of the cone 2| is formed with an annular lgroove for purposes hereinafter made clear.

I have provided a large hand wheel for use in turning the cutter head, and this is indicated generally by the reference numeral 22. This wheel has on its interior an angular opening to slidingly receive the squared portion I'I of the stem I5, and projecting downwardly from the central portion of the hand wheel 22 are two arms 23 shaped to enter the sides of the annular groove in the cone 2l, and when the hand wheel having the arms 23 is thus placed in the grooves and the cone and the squared portion I' inserted into the squared opening in the hand wheel, then the hand wheel and the stem I5 will thereafter rotate in unison without turning the cone 2l.

For the purpose of applying the desired amount of pressure in a downward operation upon the cutter head I have provided at the upper central portion of the hand Wheel 22 an extension 24 having a screwthreaded opening on its interior, and mounted in this extension is a screw 25, and by turning the screw Z5 downwardly any desired amount of pressure may be applied to the cutter head because the cone i9 prevents upward movement of the hand wheel 22, and as the screw 25 is turned downwardly, pressure upon the cutter head is increased.

In applying this device to a valve, the valve bonnet is first removed, then the valve stem I5 is extended upwardly through the bonnet until the cone I9 engages the interior of the screwthreaded opening in the bonnet, then the hand wheel 22 is applied to the cone 2i and the cone 2l is then screwed down into the opening in the stufng box I3 until the squared portion of the stem I5 enters the opening in the hand wheel 22, then the hand wheel is moved downwardly until the squared portion I'I enters, and finally the screw 25 is adjusted. I

With my improvement I have found that operators with only ordinary skill have no difficulty in applying the right amount of. pressure to my improved tool to cause the valve to be quickly and easily reseated, and to produce curled shavings from the valve seat and leave the valve seat in a smooth and uniform condition without being gouged or grooved at any point.

I claim as my invention:

l. A valve reseating tool comprising a stem, a valve cutter head thereon, a sleeve loosely mounted on the said stem and having a member thereon to engage the lower portion of. a Valve bonnet and limit the upward movement of the sleeve, a cone detachably mounted on the upper end of the sleeve to engage the top of a valve bonnet and limit the downward movement of the sleeve, a handle member connected with said cone in such manner as to be rotatable relative to the cone kand connectedY to the cone for up and down movements, means for slidingly and. non-rotatably connecting said handle member with the said stem, and means carried by the handle member for applying downward pressure to the shank.

2. A Valve reseating tool comprising a stem, a cutter head thereon, a sleeve slidingly mounted on the stem, a cone Xed to the lower end of the sleeve, a second cone detachably and adjustably mounted on the upper end. of the sleeve and being formed at its upper end with an annular groove, a hand Wheel slidngly and non-rotatably connected to the upper end of said stem and having downwardly and inwardly projecting arms to enter opposite sides of said annular groove, and a pressure screw mounted in che hand wheel for engagement with the top of said stem.

RAYMOND P. NORTON.

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