US1459460A - Valve - Google Patents

Description

June 19, 1923. 1,459,460

F. YARDLEY VALVE Filed May 4, 1922 Patented Jame 12), 1223.,

warren snares nan -tee earner oration FARNHAH YLEY, OF NEW YORK, N. Y., ASSIGNOR TO JENKINS BROTHERS, OE

' NEW YORK, NJ Y., A CORPORAEION 015 NEW JERSEY.

VALVE.

Application filed ma a,

tain new and useful Improvements in Valves; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art towhich it appertains to make and use the same.

The invention relates to a novel anduseful construction of a valve provided with means for effecting a quick opening thereof,

and with means for preventing the rapid closing of the valve, which would produce the objectionable efiect known as waterhammer.

. In my copendin application, Serial N um- 2ober 506,518, filed ctober 8th, 1921, I have described and claimed a valve ,involving a particulartype of operating mechanism, and

the object of the present invention-is to supplement the operat' means of the quick action type of valve ifiustrated, with a special construction of valve and associated dash-pot mechanism, that will be efiective in producing agradual closing of the valve without undue jar or shock, without, in any so way, interfering with the rapid opening of the valve.

The invention is illustrated in the accompanying drawing, in which the figure shows the valve in vertical sectional elevation.

as Referring to the drawing, 1, indicates the valve casing, which is preferably of the globe type, having the valve seat 2, in the cross partition, the casin being provided with the usual threaded et and outlet conto nections;

Cooperating with seat 2, is the valve proper, which comprises a metallic cup-like section 3, havin a central screw threaded boss on one side, and a T-headed lug 7,

on the opposite 'side. member 3 is fitted a seating ring 5, which engages the annular rim of the valve seat 2,

said ring 5, being held in position by means 7 of a spider-like :nut 6, adjustably mounted on the threaded hose 4:, and snugly fitting the opening in the valve seat 2, thereby servmg as guide forthe valve in its opening and closin movements, and also constituting additional closure for the opening in Within the cup-like 1922. Serial no. 558,437.

vided with a threaded opening in which is fitted a hollow cap 8, which constitutes the cylinder of a dash-pot or check device, the other elements of which comprise a piston member 9, working in the cylinder, and which is loosely connected to the hos 7, on the under side of the valve by a neck 11 having a keyhole slot slidably engaging the boss 7 the" piston member having a central vent opening 12, closed by a ball check valve 13, and

an exhaust passage 14, communicating with the passage 12, a smallv vided in the piston to a mit the ressure to the under side thereof, slowly. referably a helical spring 16 is interposed between the under surface of the piston 9, and the end of a cylinder cap 8, and normally assists the pressure-in seating the valve.

lhe valve is normally unseated by means of a loose stem 20 passing through a suitable packing land and engaging the upper end of the threaded boss 4, the outer end of ort 15, being prostem 20, being operatively engaged by the cam end 23, of the lever 22, pivotedat 24, to a suitable bracket 21, adjustably connected to the neck of the valve casing.

In the normal operation of the valve,'as

described, when the valve stem 20 is depressed by the proper manipulation of the handle 22, the ring 5, of the valve member, is first disengaged from the valve seat, and the spider member 6 is moved downward sufiicient to clear the rim of the valve seat, and thereby opening up the passage through the valve. The piston member 9, which is loosely connected to the under side of the valve moves downward against the tension of sprin 16, the fluid pressure on the under side of t e piston being released hrough the passage 12, past the ball check 13, and thence through the lateral passage 14:. This passage is of suiiicient size. to permit the instant release of pressure below the piston, so

( teeaeeo ing, thereby permitting the sprin 16, and the fluidpressure on the underside of the valve, to close the latter. If the valve were permitted to close quickly, under the influences of these two forces, it would be liable to quick deterioration because of the heavy impact between the valve and the seat, and would also produce the objectionable effect known as water-hammer.

In order to avoid these difiiculties, the valve is caused to seat slowly and without undue shock, first, by the throttling action of the spider member 6, and second, by the retarding action of piston 9, which will rise only as fast as the pressure on the inlet side of the valve seeps into the cylinder of the dash-pot, through the small openinglf), in

the piston, the check valve 13, servlng to prevent the pressure passing to the under side of the piston, through passages 1e and 12.

It will be particularly noted that the connection between the valve proper and the piston is such as to permit a relatively free movement between these elements, and as both of said elements are loosely mounted in the valve cas1ng,and are held therein principally bythe cap 8, it will be apparent that the parts may be readily removed for inspection, adjustment or repair, after which they may be quickly restored to their proper positions within the casing.

What I claim is:

1. The combination of a valve casin a transverse valve seat therein, a valve c osing against said seat, having a T-headed lug on the rear face, a hollow screw cap forming a cylinder engaging in an opening in the bottom of the casing, a piston working in-said cylinder and having a slotted neck surrounding the lug on the valve, an exhaust passage in said piston having an inwardly seating ball check therein, and a relativelysmall inlet passage in said piston to slowly admit .the pressure to the cylinder.

2. lhe combinatiton of a valve casing having a transverse valve seat therein, a hollow screw cap forming a cylinder mounted in an opening in the casing opposite the valve seat, a disk valve closing against said seat, a piston working in said cylinder, means for detachably connecting the piston to the rear of'the valve disk, an exhaust passage in the. piston, an outwardly openin check valve in said passage, and a relative y small inlet passage in said piston to admit pressure gradually to the cylinder.

In testimony whereof ll affix m signature.

FARNHAM YA DLEY.

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