US1397591A - Valve - Google Patents

Description

c. c. LAURITSEN.y

VALVE.

APPLICATION FILED APR. 12. 1920.

Patented N ov. 22, 1921.

/fef

- PE2/627%): m @722W UNITED STATES PATENT OFFICE.

CHARLES C. LAURITSEN, OF CLEVELAND, OHIO, ASSIGNOR TO THE OHIO BODY & BLOWER COMPANY, 0F CLEVELAND, OI-IIO, A CORPORATION OF OHIO.

VALVE.

Speeicaticn of Letters Patent.

Application led April 12, 1920. Serial No. 373,301.

To all whom t may concern.' 4

Be it known that I, CHARLES C. LenmarsEN, a subject of King ot Denmark, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented a certain new and useful Improvements in Valves, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings.

This invention relates to an improved self-acting valve that is adapted to automatically control the supply ot liquid to a tank, reservoir or the like; and its objects are to provide a highly efficient device of this character, yet one that is simple ot construction; economical 'and convenient of manufacture 5 is durable, obviating the need of piston packing; which acts with a cushioning etfect at the end of its stroke, avoiding injury to the valve seat by pounding; is positive oit operation; is not likely to get outV ot order, and which lends itseltl readily to various installations.

An embodiment of my invention through lwhich the -foregoing' objects are attained is illustrated in the drawing accompanying and toi-ming a part hereof, and wherein Figure 1 shows a section through the valve; and Figs, 2 and 3 installations thereof, the latter illustratingl a modification ot the valve.

Referring to the drawing bythe use of reference characters, 1 is the valve casing that is divided into inlet and outlet compartments 2 and 3, respectively, by a partition '-1 containing a valve seat 5. The valve seat, in the present instance, is incorporated in a spider that is screwed into an aperture of the partition and has a central guide G spaced :from its rim by radial arms 7.

Operating within the guide 6 is the tubular stem 10 of a valve element 11 involving thevalve disk 12 and piston 13.y The valve diskis shown as having a tapered seating portion corresponding in angle with the cooperating part ot the valve seat 5 and it is of lesser diameter than the opposed circular tace ot the piston 13 which is spaced a suitable distance from the valve disk along the stern 11, the parts having strengthening ribs 14 disposed between them. The piston 13 operates within a cylinder 15 formed in the upper end ot the casing 1 and in axial alinement with the valve seat. The outer end ot the cylinder is closed byv a cover plate 16 that may be secured by any suitable means to the casing. A passageway 18 is formed in a thickened portion ot the wall of cylinder 15 and communicates with the cylinder in the vicinity ot its inner and outer ends, the outer end of the cylinder being shown as ,of somewhat greater diameterthan the portion within which the piston 13 is guided. It will be observed that the lower end of the passageway 18 enters the cylinder immediately adjacent the latters inner end so that the passageway is uncovered upon a slight outward movement of the piston trom its innermost position. And it may be explained, urther, that the piston tits the cylinder loosely enough to permit ot a slight leakage past the piston from the inlet chamber of the casing. l

A threaded boss 19, ontowhich a perforated cap 2O is screwed, projects outwardly beyond the circular wall ot the piston 13 and constitutes, in effect, an extension ot stem 10; and confined within the cap for movement toward and trom its seat is an auxiliary or pilot valve 25 having a stem V2G that is guided within the bore ot the tubular stein 10, the stem 26 being fluted at 27 to avoid obstruction otlow through the bore of the former stem when valve 25 is lifted oit its seat.

Patented Nov. 22,1921.

A pipe 30 has oney ot its ends screwed i through a tapped hole in the wall of casing l opposite, and in axial alinement with, the cylinder 15, and stem 26 is shown as projecting into the pipe. The lower end ot' the pipe is threaded for the application of a cap 31,

equipped with a packing-gland 32 for preventing leakage about a rod 33 that is guidedy through a hollow boss Se onto which the gland nut is threaded. The rod 33 is connected to the pilot valve stem 26 through Y a tube 35 which is slipped over the rod and stem and connected thereto by pins 37.

The rod 33 is pivoted to a lever 38 which has its tulcrum in the lower end ot a link 39 that is swung from an arm L10 projecting from the side of the cap 31. A float 41 is carried by the outer end ofthe lever 38. l

In Fig. 2 I have shown my improved valve in a pipe or conduit i2 which supplies liquid to a system including a iilter 113 and a tank dil, the tank having an outlet 45. The float mechanism is situated within the tank andl serves through its connection with the valve `13, lifts the valve disk 12 from its seat. A

iiow of liquid is now established through conduit 42 and it continues until the liquid level within the tank lll rises sufficiently to elevate the float and draw downward on the Y rod 33, and parts connected therewith, and

seat the valve 25. Assoon as this valve is seated and the escape of liquid from the cylinderl is cut off, the pressure, communicated to the cylinder from the inlet' chamber 2 through the passageway 18, builds up rapidly within the cylinder and forces the piston in a direction to seat the' valve diskv l2. As the disk approaches its seat, the speed of the piston is materially retarded by reason of its closing the inner end of the passageway 18 and making the further supply of liquid to' the cylinder 15 Vdependent upon the escape of the liquid-past the piston. This course being quite restricted and the passage of liquid there-I through comparatively slow, the movement of the piston at this stage in its operation is correspondingly sluggish and as a consequence the valve is gently lowered to its seat.

From the foregoing description it will be obvious to those skilled in the art that my invention is applicable to numerous situations, the installation just described being only one example of its use. Another eX- ample, and one which allows of a slight change inthe valve design, is shown in F ig. 3. Here the float mechanism is situated within the receiver 4:6 into which the conduit 42a discharges directly. Consequently there would be no object in preventing leakage from the valve to the receiver, so that not only may the packing gland 32 be omitted, but a larger pipe 30a may be substituted for the lformer pipe' 30, the valve casing communicating directly therethrough with the receiver, obviating the needv of further pipe and converting, in the present instance, the valve casing l from a straight to an L connection.

Attention is particularly directed tothe manner in which the float mechanism is connected to the casing l and to the stem of the auxiliary or pilot valve 25. inasmuch as these connections are accomplished through the use of standard pipe and tubing, represented herein by the elements '80 or 30a andV 35, it is evident that to alter the distance between the valve casing and iioat mechanism requires only the substitution of appropriate lengths of pipe and tubing, and these can be readily obtained in any desired lengths, and threaded and perforated for the purpose, with little trouble and at slight.V

expense. Y Having thus described my invention, what '1 claim is 1. In a valve of the character set forth,

Vthelcombination of a casing divided into an inlet and an outlet compartment by a partition having an opening surrounded by a valve seat, the casing involving a cylinder opening into the inlet compartment, there being a passageway through which the inlet compartment communicates with the outer end of the cylinder when the hereinafter mentioned piston is at any but its innermost position, a piston within the cylinder, Va

valve element for cooperation with the valve seat and `havingl operative connection with the piston so as to move in unison therewith, the piston having a greater area exposed to the inlet compartmentV than has the valve p in unison therewith, the parts being so designed that when the valveelemcnt is lon its seat, the piston closes the aforesaid passageway from Vdirect communication with the inlet compartment, the piston having a greater area exposed to theinlet compartment than'has the valve element, andmeans governing the escape of fluid from the cylinder.

3. In a valve of the character set forth, the combination of a casing divided into an inlet and an outlet compartment by a partition having an opening surrounded by a valve seat, the casing involving a cylinder opening into theinlet compartment, a piston within the cylinder, a valve element for cof operation with the valve seat and having operative connection with the piston so as to move in unison therewith, the piston having a greater area exposed to the inlet compartment than has the valve element, there being a 'oy-pass through which the outer end of the cylinder communicates with the inlet compartment and which is closed from direct communication with the inlet compartment when the valve element is on its seat, and means governing the escape of iiuid from the cylinder. Y

'4. In a valve of the character set forth,

the combination of a casing divided into an inlet and an outlet compartment by a partition having an opening surrounded by a valve seat and incorporating a cylinder that opens int-o the inlet compartment and is in axial alinement with the valve seat, a member `incorporating a piston that operates within the cylinder and a valve element for coperation with the seat, the piston and valve element being connected together and spaced apart by a tubular stem which opens beyond each the piston and valve element, an auxiliary valve for closing the bore of the tubular stem and having a stein extending through said bore, the casing having an opening in its wall through which access may be had to the last mentioned stem, a tubular extension applied to the casing in register with said opening, a fitting applied to the opposite end of the extension, a rod guided within said fitting, a sleeve fitting over and connecting the stem of the auxiliary valve and said rod, and float mechanism operatively connected with the rod.

5. In a valve of the character set Jforth, the combination of a casing divided into an inlet and an outlet compartment by a partition having an opening surrounded by a valve seat and incorporating a cylinder that opens into the inlet compartment and is in axial alinement with the valve seat, a member incorporating a piston that operates Within the cylinder and a valve element for coperation with the seat, the piston and valve element being connected together and spaced apart by a tubular stem which opens beyond each the piston and valve element, an auxiliary valve for closing the bore ot' the tubular stem and having a stem extending through said bore, the casing having an opening in its wall through which access may be had to the last mentioned stem, a tubular extension applied to the casing in register with said opening, a fitting applied to the opposite end oi the extension, a rod guided within said fitting, a sleeve fitting over and connecting the stem of the auxiliary valve and said rod, and float mechanism carried by the fitting and operatively connected with the rod.

6. ln a valve of the character set forth, the combination of a casing divided into an inlet and an outlet compartment by a partition having an opening surrounded by a valve seat and involving a cylinder opening into the inlet compartment in axial alinement with a valve seat, a member incorporating a piston which operates within the cylinder and a valve element for cooperation with the seat, the piston and the valve element being connected and spaced apart by a tubular stem the bore whereof opens beyond each the piston and the valve element, the piston having a greater area exposed to the inlet compartment than has the valve element, an auxiliary valve for closing the bore of the tubular stem beyond the piston and having itself a stem which extends through the bore of the tubular stem, the casing having an aperture in axial alinement with the cylinder and valve seat, a pipe having one of its ends fitted within the aperture of the casing, a cap applied to the opposite end of the pipe and having a guide opening, a rod reciprocable within said opening, means connecting the rod and the last mentioned valve stem, a float lever suspended from the cap and having a part operatively connected to the rod, and a float carried by the lever, there being means for supplying iuid to the cylinder.

7. n a device ot the character set forth, the combination of a valve casing divided into an inlet and an outlet compartment, a main valve arranged to close communication between said compartments, means actuated by fluid Jfrom the inlet compartment for closing the main valve, a pilot valve for releasing said fluid and allowing the main valve to open, a conduit communicatively connected with the outlet compartment and into which 'the outlet compartment may discharge, oat mechanism, and means extending throughout said conduit and operatively connecting the float mechanism with the pilot valve.

In testimony whereof, I hereunto aliix my signature.

CHARLES C. LAURITSEN.

Images