US1841938A - Valve re-seating tool - Google Patents

Description

Jan, 19, 1932. 1.. s. DAVi$- ,938

VALVE RES EATING TOOL Filed May 21, 1929 gnmntoz Patented Jan. 19, 1932 PATENT LEO S. DAVIS, 0F MONTESANO, WASHINGTON I VALVE IRE-SEATING TOOL Application filed May 21,

This invention relates to a tool for use in reseating flat surface valves of the type used in connection with water and other pumps.

The primary object of the present invention is to provide a tool which may be applied to the valve while the same is upon its seat and which will rotate the valve upon the seat to smooth the underface thereof and the face of the seat upon which it positions.

Another object of the invention is to provide a tool of the above described character by means of which a regulated pressure of the valve against the seat during the reseating operation may be maintained.

Still another object of the invention is to provide a reseating tool for flat surface valves which is of simple but strong and durable construction and. adapted to be easily and quickly applied to or removed from position.

The invention will be best understood from a consideration of the following detailed description taken in connection with the accompanying drawings forming a part of the present invention with the understanding, however, that the invention is not confined to any strict conformity with the showing of the drawings but may be changed or modified so long as such changes or modifications mark no material departure from the salient features of the invention as expressed in the appended claims.

In the drawings Figure 1 is a view in side elevation of the valve reseating device embodying the present invention. V Figure 2 is an enlarged longitudinal sectional view through the device and through a portion of a pump showing the application of the device to the pump valve.

Referring to the drawings in detail wherein like numerals of reference indicate corresponding parts throughout the several views, the numeral 1 indicates a portion of a water pump showing a removable valve seat 2 supporting a valve 3 of the type upon which the present tool is designed to be used.

In the application of the reseating tool embodying this invention, the usual stem which is attached to the central portion of the valve seat in the threaded passage 4, and

1929. Serial No. 364,840.

the spring which is connected to the stem and holds the valve 3 in position, is removec, and the guide stem of the present tool which is indicated as a whole by the numeral 5 has the threaded lower end 6 thereof engaged in the aperture of the valve seat, in the manner shown. A substantial part of the upper end of the stem 5 is also threaded as shown and the upper end of the stem is squared as inditure 8 of a milling cutter which is indicated generally by the numeral 9. This cutter 9, as shown, is in the form of a round flat plate, the underface of which is formed to provide a series of radially extending teeth 10 which bite into the top surface of the valve 3 when the tool is applied thereto. The upper face of the cutter 9 is centrally recessed to receive a driving plate 11, the upper face of which is formed to provide an annular series of ratchet teeth 12 which are engaged by siniilarly formed teeth 13 about the lower edge of an upright driving sleeve 14 through the central portion of which the stem 5 passes.

Surrounding the guide stem 5 in the lower part of the driving sleeve 14 is an inner or guide stem sleeve 15, the lower end of which rests upon the ratchet driving plate 11, in the manner shown. The lower end of this sleeve 15 is surrounded by a bearing 16 which rests upon the driver 11, and supports a compression spring 17.

The driver plate 11 is secured to the milling cutter by suitable screws passii through the bottom of the cutter each indicated at 18.

The inner wall of the ratchet drivin sleeve 21. This washer 22 is held in place and moved up or down upon the stem 5 by a feed nut 24, the upper end of which is provided with a knurled flange 25.

As shown, this feed nut engages the leads upon the upper end of the stem 5 and is worked up and down thereon to increase or decrease the compression of the spring 17 and 21, as previously explained.

From the foregoing description it will be readily seen that when the valve reseating machine is in position in the manner shown, upon a valve, by manipulating the nut 24, the relatively heavy compression spring 17 may be placed under tension to force the milling cutter 9 firmly down against the top face of the valve to cause the teeth 10 thereof to engage and hold the valve, the stem 5 by reason of its connection with the head 2 acting to prevent the spring lifting the tool away from the. valve. At the stone time that the compression spring 17 is pres ,l down by the nut 24, the light spring 21 will also be placed under compression to more firmly engage the ratchet driver plate.

By applying a wrench or other suitable tool to the polygonal shaped upper end of the sleeve 14, the sleeve may be rotated to cause rotation of the milling cutter and of the valve engaged thereby, thus working the underface of the valve upon its seat to smooth and make the same conform to the surface of the seat upon which it rests.

Having thus described my invention what I claim is 1. A flat surface valve resenting tool comprising a seat engaging stem, a valve ongaging member rotatable about the stem, a sleeve surrounding said stem and carried by the member, a resilient element surrounding the stem and supported upon said member, a resilient element surrounding the stem and supported by the sleeve, means carried. by and shiftable on the stem for controlling the tension of said resilient elements, and a ratchet connection between the lower end of said sleeve and the valve engaging body.

2. A valve resenting tool, comprising a stem, means for mounting said stem in working position relative to the valve seat, a member rotatable about the stem having teeth in the under-face adapted to engage a valve restin on the seat, a member surrounding the stem having ratchet tooth connection with the valve engaging member, a pair of elements upon the upper end of said stem one arranged above the other, the upper one of said elements having threaded connection with the stem, and a pair of spring members surrounding the stem each bearing at its upper end against the underface of the under one of said elements and one bearing at its lower end against the valve engaging member, the other spring having connection with and forcing said second mentioned member downwardly into firm engagement with the valve engaging member.

3. A valve reseating tool, comprising a stem, means for mounting said stem in working position relative to the valve seat, a valve engaging body surrounding the stem and having teeth upon the under-face thereof to bite into an underlying valve on the seat, a sleeve surrounding the stem having ratchet tooth connection with the valve engaging body, a pair of superposed members disposed at the upper end of said stem and having the stem passing therethrough, the upper one of said members having threaded connection with the stem, :1 pair of antifriction elements one carried by the valve engaging body and the other carried by and within said sleeve, a spring member surrounding the stem and in engagement at its upper end with the lower one of the elements at the upper end of the stem and bearing at its lower end upon one of the anti-friction elements, and a second spring surroundim the first spring and hearing at its upper end against the said lower one of the elements at the upper end of the stem and at its lower end against the other of the anti-friction elements.

4. A valve reseating tool, comprising a stem, means for mounting said stem in working position relative to the valve seat, a valve engaging member mounted for free rotation about said stem, an actuating member for the first mentioned member surrounding the stem and supported by the valve engaging member, a ratchet connection between said members, and a pair of compression springs surrounding said stem and disposed one within the other and further having connection at one end with the stem, one of said spring members exerting pressure upon the valve engaging member and the other sprin member exerting pressure upon the SGCOIN mentioned member.

V 5. A valve resent-ing tool, comprising a stem, means for mounting said stem in working position relative to the valve seat, a valve engaging member mounted for free rotation about said stem, an actuating member for the first mentioned member surrounding the stem and supported by the valve engaging member, a ratchet connection between said members, a pair of compression springs surrounding sa-idstem and disposed one within the other and further having connection at one end with the stem, one of said spring members exerting pressure upon the valve engaging member and the other spring member exerting pressure upon the second mentioned member, and means adjustably mounted upon the stem for increasing or decreasing the compression of said springs.

In testimony whereof I hereunto aliix my signature.

LEO S. DAVIS.

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