US1328274A - Valve - Google Patents

Description

W. M. FLEMING.

VALVE.

APPLICATION FILED NOV- 5, 1914.

Patented Jan. 20, 1920.

, UNITED STATES; PATENT OFFICE.

WILLS FLEMING, OF HOLYOKE, MASSACHUSETTS, ASSIGNOR. BY MESNE ASSIGN- MEN TS, TO WORTHINGTON PUMP AND MACHINERY CORPORATION, OF NEW. YORK, N. Y., A CORPORATION OF VIRGINIA.

VALVE.

Specification of Letters Patent.

Patented Jan. 20,1920.

Application filed November 5. 1914. Serial No. 870,425.

To all whom it may concern:

Be it known that I, WILLS M. FLEMING, a citizen of the United States, residing at Holyoke, county of Hampden, and State of Massachusetts, have invented certain new and useful Improvements in Valves, fully described and represented in the following specification and the accompanying drawings, forming a part of the same.

This invention relates to improvements in valves, and particularly to valve mechanism for pumps of the type disclosed in my Patent N 0. 1,109,672, although the invention is applicable to pumps and valve mechanism of other types. In that patent, the construction is such as to necessitate as small a clearance as practicable in the space or passage into which the inlet valve mechanism opens and from which the outlet valve mechanism discharges. In a pump of the type shown in the drawings of said patent,

the inlet valve is in alinement with the discharge or outlet valve and the inlet valve is held to its seat by a compression spring which has one end bearing against the inlet valve and the other end bearing against the outlet valve. The object of the present invention is to provide an improved construction in which the inlet valve is controlled by a tension spring and certain advantages secured, as will be more fully explained hereinafter.

With this general object in view, the pres ent invention consists in the features, details of construction and combination of parts which will first be described in combination with the accompanying drawings and then more particularly. pointed out.

In the drawings, Figure 1 is a detail vertical section of a pump cylinder and valve chest embodying this invention; and

Fig. 2 a similar view takenin a plane at right angles to Fig. 1.

Referrin to, the drawings 1 indicates a pump cylinder of the outside packed plunger pump type, having a single port or transverse passage 2 sloping upward, the inner face of said port having its lower edge coincident with the bottom of the pump cylinder, while its upper edge is not higher than the lower edge of the outer face of said such length relative to the cylinder that when the plunger .is at its extreme limit downward, it will leave a slight clearance space between its bottom and the bottom of the cylinder, while at the same time its upper end will project beyond the cylinder, a suitable outside packing gland 4 being provided, which gland serves to compress the packing 5 contained in a recess or counter-bore at the upper end of the cylinder, stud bolts and nuts as indicated at 6 being provided to force the gland 4 against the packing.

At the upper end of the cylinder and surrounding the plunger gland is a basinwhose walls 7 extend considerably above said gland. This basin serves to contain a liquid and thus forms ameans for sealing the plunger air-tight. Water may be used as the sealing liquid, and its level should be kept above the top of the gland in order to seal the plunger and thereby prevent leakage of air into the cylinder, and to lubricate and cool the plunger when the pump is operating as an air-compressor or vacuum pump.

At one side of the cylinder is secured a valve-chest 8, which contains both the inlet and outlet valves, which in the present eX- ample are in vertical alinement. This valve-chest is closed at the top by a cap 9 secured to the valve chest, in the usual way, as by bolts and nuts. The valve chest has an inlet chamber indicated at 10 and an outlet chamber indicated at 11. The top wall 13 of the outlet chamber are separated to form an intermediate space, which registers with the outer face of the transverse port or passage 2 of the pump cylinder, the bottom wall of said intermediate space being above the bottom of the cylinder and arranged to drain thereinto.

The wall 12 is arranged to receive a removable seat 14 for the inlet valve, and the wall 13 is arranged to receive a removable seat 15 for the outlet valve. The seats 14 and 15 are advantageously threaded to their respective walls and have flanges received in counter-bores in said walls. The opening for the outlet valveseat 15 is of greater diameter than the inlet valve seat 14 so that. by' removing the cap 9, the outlet valve and its seat may be removed, whereupon the valve is provided on its lower surface with.

suitable wings, as shown,- which serve to guide the valve during its vertical move ments.

An inlet valve, indicated at 22, is arranged to close downward against the seat 14:. For the purpose of yieldlngly holding this valve against its seat, a suitable'tension spring is provided, this spring being connected atone end to the valve and at its other end to a suitable fixed portion of the pump. In the best embodiment of the invention, the. spring is so arranged that the valve may be rotated, as when grinding it on its seat, Without removing the spring or detaching it from the valve, and, furthermore, the spring advantageously is so connected that it .may be readily detached from the valve or from its fixed point of attachment.

In the present embodiment of the inven tion, the spring, indicated at 23, is provided at each end with a hook, these hooks'being formed as shown in Fig. 1.

- arranged to enter a slot in the wing hub of the inlet valve and to spring over a pin 24 carried by the inlet valve and extending transversely of the slot. The other hook of the spring is arranged to spring over a pin 25, carried by the slotted head 26 of a shackle bolt, having a threaded stem 27 which passes through' a hole in a cupped plug 28 secured in the bottom wall of the inlet chamber. The stem is provided with a nut 29 outside the plug, the head 26 being arranged to make a water-tight joint with the inner face of the plug. By screwing up the nut, the head will be pulled tightly against the plug.

The cupped plug 28 is suitably extended outside the bottom wall of the inlet chamber to receive a wrench, whereby it may be readily unscrewed. .The cup of the plug is an advantage, in that it receives the head of the shackle bolt and thus avoids unnecessary obstruction ofthe inlet chamber.

It will be seen that, by the arrangement described, the clearance chamber can be made as small in height as may 'be desired, thereby avoiding the disadvantages of a larger clearance chamber. Further, the inlet and outlet valve-springs may be adjusted as desired', since each is entirelyindependent of the other. Finally, the construction is One hook is.

such that both valves may readily beiremoved, notwithstanding the use of a tension spring.

When it is desired to grind the inlet-valve to its seat, without entirely removing the tension spring, the nut 29 may be loosened, thus leaving the shackle-bolt 'free to rotate on its axis with the tension spring as the inlet-valve is turned, itbeing understood that in this case the outlet-valve and the cap of the valve-chest are removed. Owing to the fact that thehook at one end of the tension spring 23 is received in a slot in the inlet valve, and the hook at the other end is received in a slot in the head 26 of the shackle-bolt, all danger of the hooks being accidentally released from the respective pins, 24 and25, is avoided. While it is advantageous to have the inlet-valve and its seat in such relation tothe outlet-valve and it'sseat that, bytthe removal of the .outletvalve,.the inlet-valve will be accessible; at the same time by the use-of a tension spring for the inlet-valve, there is no necessity for cylinder having walls forming an inlet a chamber, an outlet chamber and a clearance space between them, said clearance space being in direct communication with the cylinder by an open passage, of an inlet valve in the wall between the inlet chamber and the clearance chamber, a tension spring connected to the inlet valve, an adjustable plug in the outer wall of the valve chest, a shacklebolt extending through said plug and freely rotatable therein and engaging the tension spring, a nut on said bolt-outside the plug I for locking the bolt in. fixed position, an outlet valve in the wall between the outlet chamber and the clearance chamber, and means for pressing said outlet valve to its seat.

2. The combination with valve casing 8 of inlet valve 22, within the casing and having.

a slot and a pin transverse to the slot, adjustable cupped plug 28 threaded in the casing wall, shackle-bolt 27 passing through the cupped plug and freely rotatable therein and having within the cup a slot and a pintransverse to the slot, tension spring 23 hooked over said pins at both ends of the spring,- and a nut 29 on the bolt outside the plug,

.substantially as described.

In testimony whereof I have hereunto set my hand, in the presence of two subscribing witnesses. v

WILLS M. FLEMING. Witnesses:

THos. H. WESTRHAL, RAYMOND H, Plirrncnovn.

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