US1693177A - Valve - Google Patents

Description

Nov. 27, 1928. 1,693,177

J. H. HODQART ET A L VALVE Filed Dec. 28, 1925 In Ven tors Patented Nov. 27, 1928.

yj UNITED STATES:

1,693,117 PATENT OFFICE JoHN H. HODGART AND ANDREW w. iinYnoN, or TORONTO, ONTARIO, CANADA.

VALVE.

Application filed December 28; 1925. 'Scrial No. 78 022 The invention relates to improvements in valves as described in the present specification and shown in the accompanyingdrawings that form a part of the same.

The main object of the invent-ion is to provide an efficient valve which may be produced at small cost and which when once installed will require the minimum of attention.

The invention consists in the novel features of construction, arrangements and combinations more particularly pointed out hereinafter.

In the drawings Figure 1 is a central vertical sectional View through a valve casing and valve.

Figure 2 is a cross sectional view taken 0 the line 22 of Figure 1.

Figure 3 is a cross sectional view taken on the line 33 of Figure 1.

Figure 4 is a side elevation of the valve.

Like numerals of reference indicate corresponding parts in the various figures.

Referring to the drawings 1 is a pipe which may be the cylinder in which the piston is adapted to operate, said piston not being shown in the drawings, said pipe, being threaded externally at its lower end as at 2.

The valve casing is formed of upper and lower sections 3 and 4 respectively, the upper section 3 having a protuberant body portion, the reduced upper end 5 being threaded interiorly to permit of securing the casing to the pipe 1 and the reduced lower end 6 being threaded interiorly to permit of securing the section 4 thereto, said upper section being provided with circumferentially arranged projections from the inner face thereof constituting stops 7 to limit the upward movement of the valve as will be explained more fully hereinafter.

The lower section, or sleeve, 4 of the valve assembly is also tubular in form and is threaded exteriorly, as at 8, intermediate of its length to permit of securing same to the upper section 3 so that said section 4 will be positioned partly within and partly without the said upper section, the portion 9 extending into the upper section terminating preferably in engagement with the stops 7 and being provided with a series of circumferentially arranged outlet ports 10 communicating with the lower end of the ,protuberant body portion of the section 3, the wall of said portion 9 preferably being of lesser thickness than that of the threaded portion of the section in order to increase to a maX1- mum the capacity of the fluid passage 11.

The sleeve 4 is provided with an interior annular flange 12 constituting a valve seat, said seat preferably being tapered slightly as at 13. v

14 is a valve, consisting ofa cylindrical block tapered at its lower end, as at 15, to rest on the seat 12 and sliding within the sleeve 4 across the ports 10, said valve being provided with a series of a circumferential grooves 16 therearound constituting air chambers, said valve being of such depth that when in position on said seat the to edge thereof will be even with, or slightly lower than, the lower walls of the outlet ports 10, so that at all times the liquid in the casing will exert pressure on said valve to hold same to its seat.

The valve 14 is preferably cutaway from the top side thereof to provide a circular concavity 17 surrounding a central stud 18, this construction being adapted to reduce the weight of the valve and also to provide a means whereby the valve may be easily'raised by {land from its seat by the use of a suitable too Vhile a valve having a metal base contacting with a metal seat is shown, it is of course understood that either said seat or said base, or both, may be constructed of any suitable material, or any desirable form of lining or packing may be employed.

The portion 19 of the lower section, or sleeve 4 which is positioned Without the casing 3 is preferably threaded exteriorly, as at. 20, to permit of securing a supporting frame 21 thereto, said frame being provided with legs 22 adapted to support the whole.

23 is a screen supported onthe cross members 24 carried by the frame 21 for the purpose of preventing foreign matter from entering the valve casing.

The lower end of the sleeve v4 is preferably threaded interiorly, as at'25, for the reception of a pipe, should one be required, in, which case the frame 21 and screen 23 are removed.

In the operation of this invention the valve 14 is drawn upwardly by suction past the ports 10 and into engagement with the stops of said piston the valve drops downwardly 7 from passing said valve. In this connection it may be stated here that in actual practice this air seal has been found to be so effectualthat no leakage resulted even when the valve was raised slightlyfrom its seat. a

By this arrangement the iullweight of the fluid remaining above the valve when'seated rests on said valve and tends to hold same firmly to its seat. What we claim is a J In a valve, the combination with atubular casing having oppositely disposed inlet and discharge openings of lesser internal diameter'than the body of said casing, of a sleeve threading into said inlet opening and having a reduced tubular extension extending into the body of said casing and providing an annular fluid chamber therearound, said sleeve having outlet ports at intervals therearound, the lower walls of said ports being above the bottom of said chamber, saidsleeve providing a valve seat positioned belew said chamber, and a valve slidable across said ports to alternate positions clear of said ports, said valve when in contact with said seat completely fillingthe space between the lower walls of said ports and said seat and when in its fully 'raisedposition filling the space within said sleeve above said ports.

Signed at the city of Toronto, 5th day of December, 1925.

JOHN H. HODGA RT. ANDREW \V. BRYDON.

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