US274308A

US274308A - Pump-piston

Info

Publication number: US274308A
Authority: US
Publication date: 1883-03-20
Anticipated expiration: 1900-03-20

Description

S. W. GEORGE.

PUMP PISTON.

I Patented Mar.20, 1883.

(No Model.)

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n4 mans Hula-mm. vim n. c.

U ITED STATES PATENT OFFICE.

SAMSON w. GEORGE, or CHESTER, NEW JERSEY.

PUMP-PlSTON;

SPECIFICATION forming part of Letters Patent No. 274,308, dated March 20, 1883.

Application filedOetober 2.1882. (NomodeL) To all whom it may concern:

. Be it known that I, SAMSON WILLIAM GEORGE, a citizen of the United States, residing at Chester, in the countyof Morris and State of New Jersey, have invented new and usefulImprovementsinPump-Pistons,ofwhich j for the outer edge of the valve.

the following is a specification.

It is important that the piston or plunger of a lift-pun] p should have provision for adjusting the packing to the suction pipe or barrel, that the valve-part should be of a durable and effective construction, and that the suction andlifting action of the pump should be as perfect as possible. 1 t it My improvements are directed to the attainment of these objects in the production of a valved plungerin which the valve and thepacking parts are constructed with special reference to effect very perfect operation in the pump; and these improvements will be made the subject of specific claim. Referring to the accompanyingdrawings, Fignrelrepresentsavertical section of a pumppiston embracing my invention, the valve being shown as closed in the lifting and suctionactio-n; Fig. 2, a similar view, showing the valve open in the plunging action of the piston; and Fig. 3, a top view of the valve-seat casting.

The valve on is placed at the top of the piston is of leather or rubber, of suitable thickness, and is seated so as to have an inverted conical form, a fixed relation at its center to its seat and to the pump-rod, and opening and closing at its circumference with the seat. This construction gives an instantaneous and perfect seating function to the outer edge of the valve, allows it to open upon a fixed central seat, giving a free flow'for the water up through the piston, and requiring no weighting or re-enforcement.

The body of the piston is a'metal shell, b, of cylindrical form, open at both ends, with an interior web, 0, having a central core with an opening, b, for receiving the pump-rod. The shell is formed with a top rim, (1, of a diameter a little less than the interior of the suction pipe orbarrel, and is turned off atits inner upper edge to form a beveled seating-face, e, The top of the tubular core of the web 0 is of a less height than the top rim, d, and forms the central part [of the valve-seat,'upon which thevalve is clamped by a shoulder, f, on the pump-rod g, the latter passing through a central opening in the valve, thus giving itthe dish or inverted conical form and necessarily a constant pressure upon its rim seating bevel e, regulated by the thickness or stifl'ness of the valve. In the plunging action o'fthe piston the valve is opened against such force or pressure, but must be sufiiciently flexible to open readily. A key, h, driven through a slot inthe pump-rod. against the lower end of the tubular core of the shellweb, serves to secure the piston to the pumprod by the same force by which the valve is clamped upon its central seat, in which the shoulder f and the key co-operate to form such clamp and a removable fastening for the valve and for the piston. For large-sized pumpssuch as used in mining operationsa metal disk may be placed between the shoulder f and the valve, the object being to allow the valve.

to open to a limited extent at its circumference from a fixed center seat.

Apacking-ring, i,of rubber or other suitable material, is fitted upon the shell against its top rim, (1, and forms the wearing-surface of the piston, the shell portion of which should be of such diameter as to allow the use of a packing-ring of proper thickness. The shell extends below the packing to receive a loosely-fitting metal-ring follower, j, having a diameter preferably equal to that of the top rim, and abutting against the lower edge of the packing-ring, so as to bind it against the top To compensate for the surface-wear of the packing-ring, I provide means by which it is compressed against the top rim to increase its diameter or swell it laterally, and thereby maintainaclose and proper working joint with thesuction-pipe. The provision for this purpose consists of a cross-head, k, fitting loosely upon the pump-rod, with its arms preferably seated in recesses or notches in the lower end of the ring-follower, against which it is bound by jam-nuts I, screwed upon the lower threaded end of the pump-rod against the eyed part of said cross-head. By setting up these,

nuts the cross-head is forced hard against the ring-follower, which thereby compresses the.

packing-ring and expands it to the desired degree as it becomes worn. The construction allows the parts to be readily separated to renew the packing and the'valve.

I have stated that the key and the pumprod shoulder co -operate to secure both the valve and the piston upon the pump-rod; but it is obvious that the cross-head and the said shoulder may form the clamp for the valve upon its seat, a clamp for the piston upon its rod, and a clamp by which to confine and to adjust the packing-rim g in relation to its wearing-joint. I have also described the valve as being seated in the form of an inverted cone, and prefer such form as giving the best results; but it may be seated in a plane at right angles to the pump-rod. I have also shown the ring-follower and the cross-head as being separate and distinct parts, and prefer to so make them; but it is obvious that the ringfollower may be cast with a skeleton end having a central opening, and the single casting fitted upon thepump-rod and upon the lower cylindrical part of the shell of the piston and answer the same purpose.

I.claim 1. The combination of the pump-rod having the shoulderf, and a webbed shell, I), having a tubular core, b, and a top rim, d, beveled at 6, with a flexible valve, a, bound at its center and seated in the form of an inverted cone opening and closing at its circumference upon the said rim-bevel, substantially as described, for the purpose specified.

l 2. In combination,inapump-piston,theshell having an interior web, 0, a tubular core, I), and a top rim, d, projecting beyond the end of said core, and formed with a valve seating bevel, c, the pump-rod having a shoulder,f, the flexible valve a, seated upon the end of the core and opening and closing at its circumference upon said rim-seat, and the key h, passing through a slot in the pump-rod against the lower end of the shell-core, whereby the valve is secured upon said shell-core and the piston upon the rod.

3. The pump-piston herein described, consisting of the webbed'shell having a top beveled rim, (1, a tubular core, and a cylindrical body, the pump-rod having the shoulder], the packing-ring i, the ring-followerj, the crossnuts I, and the key h, all constructed and arranged substantially as described, for the purpose specified.

Intestimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

SAMSON WILLIAM GEORGE.

Witnesses:

H. W. 00131312, 0. E. THURBER.