US1195253A - Valve - Google Patents

Description

E. A. NASLUND.

VALVE.

APPLICATION FILED IUIIE 23, I9I3.

Patented Auf. 22, 1916.

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ERIC A. NASLUND, OF DUNKIRK, NEW YORK.

VALVE.

Specification of Letters Patent.

Patented Aug. 22, 1916.

Application led .T une 23, 1913. Serial No'. 775,310.

To all 'whom t may concern.'

Be it known that I, ERIC A. NASLUND', a citizen of the United States, residing at Dunkirk, in the county of Chautauqua and State of New York, have invented certain new and useful Improvements in Valves, of which the following is a specilication.

This invention relates to improvements in valves, particularly adapted for use in water tanks stationedV along railway tracks for supplying water to locomotives.

y invention has for its object the production of a valve in which provision is made to prevent leakage past the valve proper'when grit or any foreign substance lodges thereon and also to so construct the valve with a view of increasing its durabilit yTo these ends the invention consists in the' novel features of construction and in the arragement and combination of parts to be hereinafter described and particularly pointed out in the subjoined claims.

In the drawings in which like numerals of reference refer to like parts in the several figures, Figure 1 is a vertical section of a water tank equipped with my invention. Fig. 2 is a vertical section through my improved valve and parts to which it is connected. Fig. 3 is an enlarged vertical section of the lowermportion of the valve, the

valve proper beingl in a different positionthan shown in Fig. 2. Fig. l'is a cross section taken on line c-a, Fig. 2.

The reference numeral 5 designates a water tank having an outlet-pipe 6 andan inlet or supply pipe 7 to which my im proved valve 8 is secured. Said valve has a valve casing 9 which comprises three parts lO, 11, 12, but which may be otherwise constructed, if desired. The upper part 10 is a short length of pipe threaded at its lower end into the intermediatepart 11 which is a pipe T-Iitting having its lateral branch 13 connected to a lateral branch 14 ofthe inlet or supply pipe 7. The lower partf12 of said casing has its upper end threaded into the lower end of said intermediate part; it having a cylindricalupper portion 15 and a downwardlyflaring` lower portion 16. The part 10 may be termed the equalizing chamber, the part 11 the inlet member, and the part 12 the outlet member.

At the point where the cylindrical upper end of the outlet member meets theJ flaring lower portion, an offset or shoulder 17 is formed which also liares downwardly at a greater angle than said flared lower portion, serving as a valve-seat for a valve 18 movable between a plurality of longitudinallydisposed guide-webs 19 extending inward from the flaring wall of the said lower portion, the inner guide edges 2O of said webs being parallel and the valve 18 moving in contact therewith. Said webs are separated by intervening spaces 21 which serve as water passages and by reason of said webs being gradually widened from top to bottom, said water passages are correspondingly enlarged downwardly. This arrangement allows free escape of water through the valveand eliminates all pounding.

- Valve 18 closes against the water pressure and is secured to a rod 22 having its upper end projecting beyond the upper end of the valve casing for connection with a float lever 23 pivotally secured at one end `to an arm or extension 24 rising from the inlet or supply-pipe 7 and having a float 25 at its opposite end. The connection of the valve rod 22 to said float lever is such as to let said valve rod travel in a true vertical plane, and for this purpose said lever is provided with a longitudinal slot through which and the upper end of said valve rod a pivot 27 is passed. Secured to said valve rod at a point within the equalizing chamber is an equalizing plunger 28 which may be of any approved construction, it being adapted to equalize the pressure of the water as it enters the valve casing. l

f jWith a. view of preventing grit or other foreign matter lodging between the valve and thevalve-seat and alsoy to relieve the seating member ofthe valve fromV pressure I have provided thenovel constructon of valve to vbe now described, which in conjunction I'with the novel construction of valve-seat associated with the water passage 21 will most effectively producethe desired results. Said valve comprises two .metallic or other rigid members 28, 29 which are secured to the valve rod 22 in any suitable manner, but by preference are threaded onto said valve rod, which is reduced at its lower end to form a shoulder 30 against which the upper member 28 bears, both members being retained on said rod by a nut 3l threaded thereon and bearing against the lower face of the lower member 29. Valve members 28, 29 are separated by a central hub or boss 32 formed on one member and in the space thus provided is clamped a seating member 33 of rubber or any other suitable material.

Lower member 29 and seating member 33 are of like diameter and have their edges in contact with the guide webs'19 while upper member 28 is of somewhat smaller diameter so as to snugly but slidably enter the cylindrical upper portion of the outlet member of the valve casing.

1t is to be noted that the seating member 33 of the valve comes in contact with the valve-seat 17 at its greatest diameter, and as said seating member is preferably yielding, it acts to positively shut ofi the supply of water to the tank. By reason of the valve-seat 17 being made flaring, the wearing of the seating member of said valve will only result in its coming in contact with said valve-seat at a point of smaller diameter, but assurance will always be had of an absolute closure against the 'flow of Water through the valve casing.

An important feature of my invention is that the upper member 28 of the valve servesas an initial shut-od or closure member since it is constructed to enter the cylindrical upper end or neck of the outlet member of the casing before the seating member is seated, and any grit or other foreign matter will be prevented from reaching the seating member, and if of any length or size, will be sheared by said closure member if part has reached a point below the upper or smaller edge of the valve-seat. 1n this manner any grit or other matter lodging on the seating member has an opportunity to become dislodged without possibility of additional grit or foreign matter lodging thereon, since the initial closure member, owing to its snug fit in the neck of the casing for at least part of its depth, will prevent foreign matter reaching the seating member, although water may seep along the edge of said initial closure member and assist in dislodging any grit `or foreign matter thereon. Moreover, said upper member, when partly entered in the upper cylindrical portion of the outlet member serves to relieve the seating member 33 of the valve from pressure. 1t is highly essential that valves of this type should absolutely shutoff the supply of water to the tank, as in many cases the overflowing of water from the tank, particularly when surmounted on a building, may cause considerable damage. Moreover, the closing of a valve against its seat with grit or other foreign matter thereon will cause the valve to wear quick and unevenly and 1f worn Vuneven will be a continual source of annoyance due to leakage.

Having thus described my invention,l

ameters spaced apart and a seating-memberv of larger diameter than the smaller of said rigid members held between said rigid members, said valve closing against the pressure of water passing through said casing and in its closing movement being adapted to cause the smaller rigid member to at least partly enter the smaller interior portion of said casing and the exposed angle of said seating-member to bear against said valveseat after the initial entrance movement of said smaller rigid member into said smaller interior portion of the casing, said smaller rigid member serving as a shearing element to shear foreign matter that may lodge within the casing at the point at which said member enters the smaller interior portion of the casing.

2. The combination of a valve-casing having a cylindrical portion, a flaring outlet portion, a flaring valve seat joining the walls of said outlet portion With said cylindrical portion and guide webs in said flaring outlet portionA extending from the outerV end of the latter to said valve seat, said guide webs having parallel guide edges and being separated by water passages, a valve rod in said casing, a valve secured to said valve rod and comprising a rigid cylindrical member adapted to enter said `cylindrical portion, a yielding seating member adapted to close against said valve seat after the initial entrance movement of said rigid cylindrical member i-n the cylindrical portion of said casing, and a second rigid member between which and said rst-Inentioned rigid member said seating member is clamped, said second rigid member and said seating member being of the same diameter and both in contact at their parallel edges with said guide webs and said rst-mentioned cylindrical member serving to relieve said. seating` member of pressure when the latter closely approaches its seat.

3. The combination of a valve casing having a cylindrical portion, an enlarged outlet portion and a Haring valve seat joining the walls of said enlarged outlet portion with said cylindrical portion, a valve within said casing comprising a rigid cylindrical member adapted to enter said cylindrical portion, a yielding seating member adapted to close against said valve seat after the initial entrance movement of said rigid cylindrical member into the cylindrical i por- In testimony whereof I aiiX my signa-ture tion of said casing, and a second rigid memin presence of two Witnesses. ber between which and said rst-mentioned rigid member said seating member is ERIC A' NASLUND' 5 clamped, said first-mentioned rigid member Witnesses:

serving to relieve said seating member of EMIL NEUHART,

pressure when the letter approaches its seat. J AooB OBERST, Jr.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C.

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