US556636A

US556636A - Check-valve

Info

Publication number: US556636A
Authority: US
Publication date: 1896-03-17
Anticipated expiration: 1913-03-17

Description

(No Model.) v 2 Sheets-Sheet 1,

E. KUIOHLING 8; E. L. ROWE.

CHECK VALVE.

2 SheetsSheet 2. E. KUIOHLING 8: E. L. ROWE. CHECK VALVE.

(No Model.)

Patented Mar. 17, 1896.

5 a 611w 04.68 W

UNITED STATES ATENT OFFICE.

EMIL KUIOHLING, OF ROCHESTER, AND ELLIS L. ROlVE, OF TROY, AS- SIGNORS TO THE RENSSELAER MANUFACTURING COMPANY, OF TROY, NEW YORK.

CH EC K VALVE.

SPECIFICATION forming part of Letters Patent No. 556,636, dated March 1'7, 1896.

Application filed May 31, 1895- SeriaI No. 551,051. (No model.)

To all whom it may concern: ing being inclined upwardly toward this seat Be it known that we, EMIL KUICHLING, of at the inlet side and dropping below the seat Rochester, inthecountyofll/lonroe, andELLIs on the outlet side, so that there will be no L. ROWE, of Troy, in the county of Rensseplace for lodgment of silt, &c., which might laer, State of New York, have invented cerchoke the valve. In the top of the casing is tain new and useful Improvements in Checkan opening closed by a removable cover A.

Valves; and we do hereby declare that the fol- Said opening is of such size that the entire lowing is a full, clear, and exact description gate mechanism can be readily put in or taken thereof, reference being had to the accompaout, as desired, when cover A is removed.

10 nying drawings, and to the letters of refer- The gate 0 is provided withabronze facing ence marked thereon, which form part of this O to fit against the seat B, and has two pairs specification. of perforated ears 0 c projecting from its This invention is an improvement in checkrear face, said ears being horizontally in line valves especially designed for use on waterand below the central horizontal diameter of I 5 supply systems, and its objects are, first, to the gate. Between these cars are pivotally obviate the injurious shocks and pounding secured the lower ends of hangers D D by from water-ram in the pipes (attendant on the means of a through-bolt d. Said hangers are use of check-valves as ordinarily constructed) preferably of bronze extend above the gate, by making the valve-gate open and close in a and have sleeves D on their upper ends by 20 peculiar manner; second, to so construct the which they are hung on a stub-shaft E, which check-valve that its gate will open or close is supported in U-shaped lugs 61., projecting under very low pressure or from the slightest from the inner wall of the casing directly current of water in either direction, or gradabove seat B, as shown. ually but quickly unseat itself under high The shaft E is centered in any suitable 25 pressure, and will be operated without loss manner in its bearings or supports a, so that of head or pressure in the mains, and, third, thegate is hung directly opposite its seat and to render all parts of the check-valve readily (when the seat is vertical, as shown) will accessible, and simple and durable in 0011- just close by gravity, if otherwise unaffected. struction. The shaft is properly centered in its bearings 30 The invention therefore consists in the by pouring soft-metal packing into the cavi- 8o novel construction and combinations of parts ties in lugs a, while the gate is held properly hereinafter claimed, and the following is a on its seat in any suitable manner, such packdetailed description of what we consider the ing being indicated at a in Fig. 1. best and simplest form of check-valve em- On the under side of cover A are lugs A 3 5 bodying our invention, reference being made which fit over lugs a when the cover is in poto the accompanying drawings, illustrating sition and confine the shaft E in place. To the same, by letters of reference. prevent rotation thereof the shaft is slightly In said drawings, Figure 1 is a central verflattened at one end, as at E, beneath the tical longitudinal section through the checklugs, as shown in Fig. 3.

40 valve 011 line 1 1, Fig. 2. Fig. 2 is a trans- Hangers D pass through a yoke O on the 0 verse section through the valve-casing on line back and near the top of the gate. The pas- 2 2, Fig. 1, showing the valve and its hangers sages O through the yoke are slightly larger in fulllines. Fig. 3 is a top plan view of the than the hangers are thick, so that the gate valve with the top plate of casing removed. is allowed a limited swing upon bolt (1 in re- 45 Figs. 41 and 5 are detail sections like Fig. 1, lation to the hangers. showing the different positions of the valve The hangers are preferably T-shaped in in opening and closing. cross-section to make them light, but are pro- The valve-casing A, as shown, is provided vided with cross-flanges D where they pass with a Vertical bronze valve-seat B near one through the yokes to increase their contact 5 end, the bottom of passage through the caswearing-surfaces. 10o

It will be noticed that the pivots or hinge of the gate on its hangers is below the center of the gate or near the side of the gate farthest from the shaft E. Consequently there will be a tendency of the upper end of gate to drop away from the hangers. The gate is hung in this peculiar manner so that instead of rising bodily away from the seat in opening its upper end or edge nearest the shaft E will first tilt ofi the seat and allow water to flow past the top of the valve before the lower part is off the seat, and in closing the same peculiar hinging causes the reverse action of the valve, for the top of the valve will reach the seat before the lower part. Consequently while the greater part of the water is shut off at once a sufficiently small quantity of water is caught between the lower edge of valve and seat to cushion it and prevent the injurious jarring and pounding which would certainly ensue if the entire water-way was closed at once. Hence it will be seen that the action of the gate hung in this peculiar manner is such that the slightest current of water in either direction will operate it, and no appreciable loss of head or back pressure upon the pumps can ensue, and by being cushioned in the closing process the usual wear upon the seats and consequent leakage caused by pounding of the gate in closing, in valves as usually constructed, is avoided. For instance, when the gate is closed, as indicated in Fig. 1, it fits closely and easily on seat B. If a small quantity of water be withdrawn from the main in rear of the gate the slight pressure in front thereof will tilt the upper part of the gate slightly backward, as indicated in Fig. 4, unseating the upper portion of the gate sufiiciently to allow the minute quantity of water to pass before swinging the gate entirely oif its seat, and as soon as the pressure on both sides of gate is equal the gate closes easily and quietly. If a large volume of water is to pass, the gate is first tilted back, as described, and then bodily swung ofi its seat, as indicated in Fig. 5. hen the rush ceases the gate tilts forward by gravity, as indicated in dotted lines, Fig. 5, and the upper part of the gate first contacts with the seat; but, as the gate is hinged on its hangers, it yields until the bottom comes in contact with the seat also. Thus the double swinging movement of the gate prevents any sudden clacking of the gate against its seat and consequent sudden cut-off of the entire water-passage. If the gate be forced suddenly in either direction it will tilt on its hangers, and therefore instead of lifting directly away from the seat at all points, or seating directly on the seat at all points, it gradually separates from and comes back to the seat. This tilting action of the gate causes an automatic water-cushioning of the gate in opening and closing, and it further renders the cheek-valve very sensitive in action, for it will respond immediately to very slight changes in pressure which would not affect the gate if it has to lift bodily from the seat at all points simultaneously.

hile we prefer to hang the gate vertically, as shown in drawings, it might in some cases be arranged on an incline, as in ordinary forms of check-valves, the. hinge connections being maintained, so that it would be cushioned in opening and closing, as described.

For small check-valves one hanger might be found sufficient; and for very large mains we would prefer to arrange a number of the gates over corresponding seats, constructed substantially as described, but having a total area equal to the desired water-way, rather than use one large gate, as the multi-gate cheek-valve would be more sensitive in action.

The foregoing with the drawings will make clear the peculiar tilting motion of the gate and its method of hanging,whereby the weight of the gate is supported on the pivots, thus requiring only the slightest fiow of water to open the check, also its method of opening one side first and closing in the same mannerthat is, the area of water above where it is hung is so much greater than below where the gate is pivoted onto its hangers, that in closing the top of the gate always closes first and cushions down on the water passing through it.

Having thus described our invention, what we therefore claim as new, and desire to secure by Letters Patent thereon, is-- 1. In a check-valve the combination of a casing, and seat, with a tilting and swinging gate hinged on swinging supports below its center, substantially as and for the purpose set forth.

2. In a cheek-valve the combination of the casing, the seat, and the hangers hinged to the casing above the seat, with the gate fitted to the seat and hinged to the hangers below its center, so that the gate will tilt 0E and on its seat in opening and closing, substantially as and for the purpose specified.

3. In a check-valve the combination of the casing, the seat, and the hangers hinged to the casing above the seat with the gate fitted to the seat and hinged to the hangers below its center, so that the gate will tilt off and on its seat in opening and closing, and the yoke attached to the gate and embracing the hangers to limit the movement of the gate in relation thereto, substantially as and for the purpose described.

at. In a check-valve, the combination of the casing having a seat, lugs above the seat and a shaft supported in said lugs; with the gate fitted to said seat, and the hangers suspended from said shaft and pivoted to the gate below its center, for the purpose and substantially as described.

5. In a check-valve the combination of the casing having a seat, lugs above the seat and a shaft supported in said lugs; with the gate fitted to said seat, and the hangers suspended from said shaft and pivoted to the gate below embracing the hangers, all substantially as and for the purpose set forth.

In testimony that We claim the foregoing as our own We affix our signatures in presence I 5 of two witnesses.

EMIL KUICHLING. ELLIS L. ROWE.

\Vitnesses HORACE G. PIERCE, SoLoMoN R. HENDRICKS.