US1392547A - Valve - Google Patents

Description

P. F. WILLIS.

VALVE.

APPLICATION FILED FEB. I. 19|?.

Patented Oct. 4, 1921.

PATENT OFFICE.

PRIOR F. WILLIS, 0F ST. LOUIS, MISSOURI.

VALVE.

Specification of Letters Patent.

Patented Oct. 4, 1921.

Application led February 1, 1917. Serial No. 145,888.

To all whom t may concern Be it known that I. PRIOR F. WILLIS, a citizen of the United States, residing in the city of St. Louis and State of Missouri, have invented new and useful Improvements in Valves, of which the following is a specification.

This invention relates to valves, and more particularly to cut-olf valves of the plug or needle type requiring a perfectly tight closure to prevent leakage.

The invention has for its principal object to provide for the grinding and regrinding of the valve member upon the valve-seat. Other objects and advantages to be attained will hereinafter more fully appear. It consists in the novel construction and in the parts and combinations and arrangements of parts hereinafter described and claimed.

In the accompanying drawing illustrating a practical embodiment of the invention,-

Figure 1 is a vertical section showing the valve member in closed position; and

Fig. 2 is a view of the valve member detached.

In the drawing the valve casing or body member is designated by the numeral 1. At opposite ends of the body member are externally screw-threaded nipple extensidns 2, 3, while at the middle of the body member is another externally screw-threaded nipple extension 4, the latter being provided for the reception of the packing gland or nut 5, and the two others for the attachment of the couplings in a pipe connection. v

Extending inward, axially of the nipple extension 4, is a bore whose outer portion is screw-threaded, as at 6, and whose inner portion is smooth and tapered, as at 7, to provide a valve-seat, beyond which is a reduced portion 8. The body member l has.

an inclined passageway 9 Whose inner end communicates with the bore at a point outward from the valve-seat 7, and whose outer end extends to the middle of the end of the nipple extension 2. A second passageway 10 extends from the middle of the end of the nipple extension 3, at an inclination, and terminates in communication with the reduced portion 8 of the bore.

A tubular member or sleeve 11 has-one end portion screw-threaded to fit the screwthreaded portion 6 of the bore in the body member l, and its outer end portion is either provided with a handwheel 12, as shown,

'or otherwiseprovided with means to facilitate the manipulation thereof.

Extending through the sleeve 11 is a stem than the sleeve l1, and its outer end portion is screw-threaded, as at 17, to receive a nut 18 which is tightened against the end of the sleeve, whereby the shoulder 15 is drawn agalnst the opposite end of the sleeve and the sleeve and stem are normally held in fixed relation to each other.

Under normal conditions, the sleeve 11 and stem 13 being fastened together, they are turned simultaneously, whereby the sleeve, owing to its screw-threaded engagement with the bore in the body member, is moved inward or outward, and the valve member is correspondingly moved toward and away from the seat portion 7. Thus the passageway through the body member may be opened or closed.

When'it is desirable or necessary to grind or regrind the valve member and valve-seat, the sleeve 11 is moved outward a considerable distance and the nut 18 is loosened or removed entirely from the stem 13, so that said stem is free to be rotated andispermitted considerable endwise movement independently of the sleeve, the sleeve serving as centering guide for the stem during the grinding' operation.

It is to be here particularly noted that the enlargement or head 14 of the stem 13 is of an over-all diameter which enables it to move freely through the screw-threaded portion of the bore in the nipple extension, and the sleeve 11 with the stem therein is entirely withdrawable through the packing gland. Consequently the grinding of `the valve seats may be accomplished without removing the gland.

To facilitate the manipulation of the stem 13 it may be provided with a vslot 19 in its outer end, as shown, for the reception of a screw-driver or a key; or, obviously, it may be manipulated by other suitable means, either permanently or detachably applied thereto.

By such a construction and arrangement as herein set forth the valve member and the valve-seat may be ground with exact nicety and any obstructions such as carbon or the like may be readily removed. Hence the valve is particularl adapted for acetylene or similar gas, as or example, in an oxyacetylene welding or cutting apparatus o r the like, where a ne adjustment is necessary in regulating the flow of the gas and an accurate seating of the Valve is required to prevent leaka e when the flow is shut ofi'.

Obvious y theoonstruction and arrangement admits of considerable modification without departing from the spirit of the'in- Vention as defined by the appended claims and is, therefore, not limited to that shown in the accompanying drawing.

What is claimed is:

1. The valve construction as shown and described, comprising the integral body portion and nipple extension having the bore therein terminating with a valve-seat, the outer ortion of said bore being screwthrea ed, a packing gland on sald nipple extension, a sleeve having screw-threads raised from its circumferential face and fitting the threaded portion of said. bore, a stem extending slidably through said sleeve and having a valve-head at its inner e-nd abutting the end of said sleeve and coperating with said valveseat, the outer end portion of said stem projecting beyond the corresponding end of said s eeve and being screw-threaded and havin provision for the engagement of a manipu ating key the-rewith, and a nut mounted on said screwthreaded portion of said stem .to be tightened against the end of said sleeve and to be loosened therefrom, at will, said sleeve and valve head being capable of being withdrawn outward entirely from said bore and through said packing gland.

2. he specific valve construction shown, the same comprising the integral body portion 1 and nlpple extension 4, having the bore through said extension 4, screw-threaded, as at 6, and terminating with the valveseat 7 the sleeve 11 screw-threaded to fit the threads 6 of said bore and having a manipulating handle, as at 12, thereon, the stem 13 rotatable and longitudlnally slidable in said -sleeve and having the valve-head 14 at its inner end to cooperate with said valve-seat 7, the outer end portion of said stem having the slot 19 therein and being screw-threaded, as at 17, the nut 18 on said screw-threaded portion of the stem whereby to clamp said sleeve 11 against the valve-head 14, and also to be moved outward from contact with said sleeve so as to coperate with said slot 19 in the stem to afford a pocket for the reception of a key to rotate said stem 13 in said sleeve 11, and the packing gland 5 on said nipple extension through which said sleeve 11 and the valve-head 14 are entirely withdrawable.

In testimony whereof, I have hereunto set m hand.

y PRIOR F. WILLIS.

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