US1949011A - Gate valve - Google Patents

Description

J. T. FAHEY Feb. 27, 1934.

GATE VALVE 1932 2 Sheets-Sheet 1 Filed Nov. 17',

Inventor Feb. 27, 1934. J FAHEY 1,949,011

GATE VALVE Filed Nov. 17, 1932 2 Sheets-Sheet 2 o o o o 0 Z6 \j Inventor O0 Jo/zaz jifakey v x @Mw/m Patented Feb. 27, 1934 UNITED STATES GATE VALVE John T. Fahey, Oil City, Pa.

Application November 17, 1932 Serial No. 643,114

1 Claim.

This invention appertains to new and useful improvements in gate valves, the same being an improvement on my co-pending application Se-- rial No. 626,889, filed July 30, 1932, which has as 5 one of its most important objects the provision of means whereby the valve could be cleaned and re-packed without removing the valve from the line and without loss of the contents thereof,

providing of course that the valve is primarily l closed.

The improvement over the subject matter of my aforementioned co-pending application resides in the manner of supporting the screw shaft and anchoring the same below the bonnet.

The principal object of the present invention has improved over my aforementioned co-pending application in providing a valve assembly wherein the bonnet can be packed While the valve stem remains intact.

During the course of the following specification and claim, other important objects and advantages of the invention will become apparent to the reader.

In the drawings:-

Figure 1 represents a vertical sectional view through the novel valve structure.

Fig. 2 represents a top plan view of the structure with the bonnet removed and the valve stem in section.

Fig. 3 represents a sectional view taken substantially on line 33 of Fig. 1.

Fig. 4 represents a fragmentary vertical sectional view taken substantially on line 4-4 of Fig. l with the stem and valves removed.

35 Fig. 5 represents an outside elevational view of one of the valve elements.

Fig. 6 represents a fragmentary horizontal sectional view taken substantially on line 6-6 of Fig. 1.

Referring to the drawings wherein like numerals designate like parts, it can be seen that numeral 5 represents the narrow shell structure which has a downwardly tapering bottom with a drain plug 6 therein. The upper portion of $5 the shell which is open, is provided with a flange 7 around its perimeter and projecting outwardly in opposite directions are the coupling flanges 8 through which the inlet and outlet pipes (not shown) can be attached.

As is clearly shown in Fig. l, and also apparent in Fig. 4, each end wall of the shell 5 is provided immediately above the inlet or outlet opening with a pair of bosses 9-9 constructed to accommodate a pin 10 which passes through the seg- 55 mental valve element 11, the same being provided with a cylindrical extension 12 circumscribed by a beveled packing annulus 13 for engagement against the corresponding valve seat 14 on the inside of the shell 5.

A ridge-like formation 15 extends the full length of the curved side portion of the valve element 11, the same being grooved and provided with thread-like ribs for accommodating the threaded portions a of the valve stem 16. The pair of valve elements 11 both mesh with the threads of the threaded portion a of the valve stem and act in unison therewith.

Numeral 1'7 represents a block or bearing plate of rectangular construction, the samebeing provided with a lip 18 at each end thereof for rest upon the seat 19 provided in the corresponding side wall of the shell 5 and its open top edge portion. The block 17 has a bore 20 extending vertically therethrough, merging with a counterbore 21 which in turn merges with an outwardly flaring opening 22, which forms a beveled surface against which the cap plate 23 engages as in the manner substantially shown in Fig. 1. This cap plate presses against the annular rib 24 on the stem 16 and prevents rising of the stem. Screws 25 are employed and disposed through the cap plate 23 and driven into the openings 26 in the block 17 to secure the cap plate snugly against the block.

Numeral 27 represents a bonnet having a flange at its lower portion denoted by numeral 28 and nuts 29 on bolts 30 are employed for securing the flanges 7 and 28 together for maintaining the bonnet firmly secured to the shell 5. The bonnet 27 at its top portion is provided with a socket 31 for receiving packing material 32, this socket 31 being provided with an opening or bore 33 extending vertically therethrough for receiving the upper portion of the stem 16.

A pressure plate 34 is secured to the flanged portion of the packing socket 31 by bolts 35 and obviously this packing can be compressed by the pressure of this pressure plate 34. The stem 16 is operated by the hand wheel 36.

While the foregoing specification sets forth the invention in specific terms, it is to be understood that numerous changes in the shape, size and materials may be resorted to without departing from the spirit and scope of the invention as claimed hereinafter.

Having thus described my invention, what I claim as new is:--

In a valve structure, a shell, a bonnet, a rotary valve stem extending through the bonnet and into said shell, said stem having a collar thereon, a bearing plate through which the stem is disposed and upon which the collar rests, a cap plate through which the stem extends, securing means for attaching the cap plate to the bearing plate over the said collar independently of the bonnet, the ends of said bearing plate being interposed between the bonnet and the shell and securing means for securing the bonnet and shell together in clamping engagement with the said bearing Plate. J GEN T. FAHEY,

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