US2859774A - Railway car dump valve - Google Patents

Description

Nw. n, 195s original Filed Feb. 21, 1949 RAILWAY CAR DUMP VALVE LUND 2,859,774

s sheets-sheet 1 1N VENTOR [7227027 Zz//zd ATTORNEY Nov. 11, 1958 E. o. LUNDE RAILWAY CAR DUMP VALVE Original Filed Feb. 2l, 1949 m m, w m

ATTORNEY N0v.'11,195s E. o. LUNDE 2,859,774

RAILWAY CAR DUMP VALVE Original Filed Feb. 21, 1949 5 Sheets-Shegt 3 z,ss9,774

RAILWAY can DUMP VALVE Einar t). Lunde, Wyckoff, N. I., assignor to Magor Car Corporation, New York, N. Y., a corporation of Delaware @riginal application February 21, 1949, Serial No. 77,655,

now Patent No. 2,647,471, dated August 4, 1953. Divided and this application May 8, 1953, Serial No. 353,833

9 claims. (Cl. 137-620) This invention relates to a railway car dump valve.

The invention is more particularly concerned with an improved dump valve for use in'a pneumatic system for electing the dumping ot railway cars as disclosed in my (zo-pending application Ser. No. 77,655, tiled Feb. 2l, 1949 and which was issued as Patent No. 2,647,471, dated August 4, 1953 and of which Figs. l to 4 of this application is a division.

As disclosed in the referred to parent application Ser. No. 77,655, now patent number 2,647,471, the said pneumatic dumping system includes a pair of pneumatic cylinders at each side of the car, an operating air line disposed lengthwise lof the car for control from a locomotive, a charging air line for connection with a locomotive air supply for charging air into a reservoir, an automatic or pressure operative valve communicating with the reservoir and `operating air line, a directional valve in communication with the'pressurc operative valve and the pneumatic cylinders and the present dump valve being in communication with the operating air line and the pressure operative valve.

A primary object of the invention is to provide a manually operable railway car dump valve for supply of air to the operating air line in the event of the dumping being conned to individual cars 'in a train thereof in the absence of control from a locomotive.

A further object of the invention is to provide a railway car dump valve structure comprising a manually operable air admission control valve having a bleeding valve operatively associated therewith, a gravity operable air charging valve and a manually operable air exhaust valve.

Other objects and advantages of the invention will become apparent in the course of the following detailed description, taken in connection with the accompanying drawings, wherein- Fig. 1 is a vertical sectional view of the improved dump valve in accordance with a preferred structural embodiment thereof. p

Fig. 2 is a bottom plan view of the valve shown in Fig. 1.

Fig. 3 is a horizontal sectional View as observed in the plane of line 3-3 on Fig. 1.

Fig. 4 is a vertical sectional view of a modied embodiment of the valve illustrated in Figs. l, 2 andv 3.

Fig. 5 is a View partly in elevation and partly in vertical section disclosing a further modied embodiment of the invention.

Referring now in detail to the drawings, the improved dump valve structure comprises a body portion and a co-operating body portion 11, and the body portions have adjacent faces thereof clamped into engagement by means of screw bolts 12.

The said body portions 10 and 11 are further provided with aligned apertures 13 for the reception of securing means engageable with a car frame F shown in dotted lines in Fig. 1.

s United States Patent 0 Patented Nov. 11, 1958 ICC A suitable combination gasket and valve seat 14 is disposed between body portions 10 and 11.

The body portion 10 is provided with three air chambers 15, 16 and 17 with chamber 15 adjacent one end of the body portion 10, chamber 17 adjacent the opposite end thereof and chamber 16 intermediate the chambers 15 and 17.

The chamber 15 is provided with an inlet 18 for communication with an air line which in turn communicates with the air reservoir and the air charging line and the chamber 17 is provided with an outlet 19 for communication with the operating air line, and chambers 16 and 17 are in intercommunication through opening 20.

The body portion 11 is provided with an air chamber 21 having openings 22 and 23 axially aligned with air chambers 15 and 17 respectively and adapted for communication therewith. Y

The body portion 11 is further provided with an ex haust port 24 for communication with the air chamber 16.

The body, portion 10 is provided with a cylindrical skirt 25 depending within the air chamber 15 which together with an air sealing gasket 26 and a gasket retaining plug 27 provides a guide for a vertically reciprocable cylindrical valve stem 28.

The lower end of the cylindrical valve stem 28 is provided with a head 29 engageable with the combination gasket and valve seat 14 and said lower end is provided with a reduced inner radius providing a guide wall 31 for a purpose later to appear.

The upper end of the cylindrical valve stem 28 projects slightly above the upper wall of body portion 10 in its valve seated position and same is provided with circum- 'ferentially spaced guide lugs 32 for a purpose later to appear. The valve head 29 is normally maintained in seated position by means of a relatively heavy coil spring 33 disposed in surrounding relation to the skirt 25 and having its respective opposite ends bearing on the valve head 29 and the upper wall of air chamber 15.

A bleeding valve stem 34 is disposed co-axially within the cylindrical valve stem 28, whose upper end is guided by the inner ends of lugs 32 and Whose lower end is provided with circumferentially spaced guide lugs 35 cooperating with said guide wall 31.

The lower end of the valve stem 34 is provided with a valve head 36 for co-operation with a valve seat 37 on the Valve head 29.

The bleeding valve is normally maintained in open position by means of `a relatively light coil spring 38 which encircles the stern 34 and whose opposite ends react upon lugs 32 and a circumferential ilange 39 on the stem.

A head member 4d is releasably secured to the upper end of valve stem 34 as by means of a Cotter 41 and the head member normally engages lugs 32 as is indicated in Fig. l.

The head member 40 is provided with spaced apertured ears 42 through which projects a pivot pin 43.

The body portion 10 is further provided with a second cylindrical skirt 44 depending within the air chamber 16 which together with an air sealing gasket 45 and a gasket retaining plug 46 provides a guide for a cylindrical exhaust'valve stem 47 whose lower end is provided with a Vhead 48 co-operable with said combination gasket and valve seat 14 and which is normally maintained in seated position by means of a relatively heavy coil spring 50 which is disposed in surrounding relation to the skirt 44 and has its opposite ends bearing on the head 48 and the upper wall of the air chamber 16.

The upper end of the exhaust valve stem 47 is provided with spaced apertured ears 51 through which projects a pivot pin 52.

A cylindrical check valve guide 53 is disposed coaxially within the air chamber 17 and the lower end 0f the guide is provided with an annular groove 53a in which is disposed a O-ring 53b which provides a seal with the body 10.

The check valve guide 53 is provided with a pair of air ports 56 and a ball type check valve 57 normally seats under the action of gravity on a seat 58 on the guide 53.

These ports are so placed that when the check valve 57 is seated, the ports will permit air pressure from chamber 1'7 to enter the inner portion of guide 53 and thus act to hold the ball check on its seat. Also, these ports 56 are so placed that when the air pressure from beneath the ball check has forced same upward into contact with plate 54, the ports will permit the passage of air through the guide 53 into chamber y17.

An actuating lever arm 59 is provided for manual actuation of the valves 29, V36 and 48 in the manner disclosed in said parent application and the said arm is provided with 'longitudinally elongated slots 60 through which said pivot pins 43 and 52 project.

Having described the structure of the improved dump valve in accordance with a preferred embodiment thereof, the operation is as follows- With the valve in the neutral position of Fig. l and a dumping operation is to be performed, the lever arm 59V is lifted from its full line position to the dump position 59-D, indicated in dot-and-dash lines. Upon initial upward pressure on the lever arm, the exhaust valve 48 remains on its seat` 14 and the pin 52 at the top of the exhaust valve stem 47 acts as a fulcrum for the lever arm 59.

Lifting of the lever arm 59 will then cause the bleeding valve 36 to move to its seat 37 on the inlet valve 29, and then the continued movement of the valve stem 34 will fully open the inlet valve 29.

The valve chamber 15 is adapted for communication with the reservoir through inlet 18.

The opening of the inlet valve 29 therefore, will permit the owof air from the reservoir into the chamber 21 and thus to the underside 0f the check valve 57. The air pressure within chamber 21 will effect opening of the valve 57 and the air will then flow through the ports 56 in the check valve guide 53 and into the valve chamber 17 which is in communication with the operating air line through the outlet 19.

When the air pressure in the valve chamber 17 reaches a point where it is approximately equal to the pressure in chamber 21, the check valve 57 will automatically seat itself. This action will seal valve chamber 17 from the chamber 21 and will permit the exhaust valve 48 to control the exhausting of air from the air operating line.

In order to return the cars from the dump position to anormal position, the lever arm 59 must be depressed to the exhaust position 59-E as indicated in dot-anddash lines in Fig. l and this action of the lever arm will result in the following actions- First, the exhaust valve 43 will remain on its seat 14 and the pin 52 will act as a fulcrum for the lever arm 59. The downward movement of the lever arm will rst cause the bleeding valve 36 to leave its seat 37. The bleeding valve will move until the cap 40 of the top of thev bleeding valve stem 34 cornes into contact with the top of `the inlet valve stem 28, and thus cause the inlet valve to close.

This action will permit any air in chamber 21 to exhaust ,to the atmosphere through the bleeding valve 36 and the open ports between the guide lugs 32 at the top of the vinlet valve stem 28.

When the inlet valve 29 is seated, the pin 43 at the top of cap 40 becomes the fulcrum for the lever arm S9 and Ythecontinueddownward movement of the lever arm will cause the exhaust valve 48 to open.

This action will permit the air in the .operating air line 1to escape through the valve chamber 17, past the open exhaust valve 48 and to the atmosphere from the exhaust port 24. After the air pressure in the operating air line has thus been exhausted, the lever arm 59 is placed in its neutral position shown in full lines in Fig. 1.

With the various parts in the neutral position, it will be noted that the check valve 57 will seal the pressure in the operating air line valve chamber 17 until such time as the exhaust valve 48 is opened. Any leakage of .reservoir pressure past the inlet valve Z9 will be permitted to escape to the atmosphere through the open bleeding valve 36 and out through the open ports at the top of the cylindrical inlet valve stem 28.

A modied embodiment of the inlet valve is shown in Fig. 4 and wherein the inlet valve stem 231 is provided at the lower end thereof with a recess 61 whose cylindrical wall is provided with circumfercntially spaced vertical channels 62 and the bleeding valve comprises a ball 63 which is engaged by a relatively light coil spring 64 from above and by which the ball is normally urged into engagement with a small snap ring 65 seated in the wall of recess 61.

The remaining elements shown in this figure correspond to the like elements in Fig. 1 and are designated by corresponding reference characters.

The modied form of dump valve shown in Fig. 5 is substantially of the same construction as that shown in Figs. l to 3. The predominating distinction between the valve of Fig. 5 and that of Figs. l to 3 is that in the latter, the inlet chamber 15, exhaust chamber 16 and the outlet chamber 17, are all provided in the single body portion or casting 10, while in the structure of Fig. 5 the inlet chamber 15 is provided in a body portion or casting 10a while the exhaust and outlet chambers 16 and 17 are provided in a body portion or casting 10b which is wholly independent of the bodyportion 10a as is indicated by the space designated S on the drawing.

This purpose of this modied structure is that in the event of leakage due to a defect in the body portion 19a, no air pressure could pass into the body portion which is connected with the operating line.

While I have disclosed the invention in accordance with but a single specic structure embodiment thereof, such is to be considered as illustrative only, and not restrictive, the scope of the invention being dened in the sub-joined claims.

What I claim, and desire to secure by U. S. Letters Patent is:

l. A dump valve structure comprising a body portion, an air chamber in said body portion provided with an air inlet, a second air chamber in said body portion provided with an air outlet, a third air chamber in said body portion, a communicating opening between said third air chamber and each of said rst and second air chambers, a valve controlling each of said openings, a fourth air chamber in saidbody portion intermediate said first and second air chambers, an intercommunicating opening between said second and fourth air chambers, an exhaust port communicating with said fourth air chamber, and a valve in said fourth air chamber for controlling said exhaust port.

2. A valve structure according to claim l, wherein the valve for controlling the opening between the lirst and third air chambers, and the valve for controlling said exhaust port, each comprise a seat engageable head and a stern, reciprocally disposed within said body portion and projecting therefrom, and a manually operable lever arm having pivotal connections with the projecting ends of said stems.

3. A valve structure according to claim 2, wherein the valve stem of the valve for controlling the opening between the first and third air chambers is tubular, a bleeding valve including a head engageable with a seat on the head of the last named valve and a stem reciprocally disposed within the said tubular valve stem, and said pivotal connection between said lever arm and said tirst valve comprising a head member provided with a pivot pin and being secured to the bleeding valve stem.

4. A valve structure according to claim 1, wherein said valve controlling the opening between the second and third air chambers is an automatic check valve.

5. A valve structure .according to claim 1, wherein a cylindrical check valve guide is disposed Within said second air chamber, a spherical check Valve disposed within said guide, a valve seat on said guide and air ports in the wall of said guide.

`6. A valve structure according to claim 2, wherein the stem of the valve for controlling the opening between the rst and third air chambers is tubular, and a bleeding valve within said stem comprising a valve seat on the stem, a spherical valve `co-operating with the seat, and a spring normally urging the valve to its seated position.

7. A dump valve structure comprising a vertical air chamberprovided with a horizontal air inlet, a second vertical air chamber provided with a horizontal air outlet, a third air chamber disposed beneath said tirst and second air chambers, a communicating opening between said third air chamber and each of said tirst and second air chambers, a valve controlling each of said openings, a fourth air chamber disposed intermediate said first and second air chambers, a horizontal disposed intercommunicating `opening between said second and fourth air chambers, an exhaust port communicating with said fourth air chamber, and a valve in said fourth air chamber for controlling said exhaust port, the axes of said Valves, said intercommunicating openings and said exhaust port being in a single vertical plane.

8. A dump Valve structure comprising a first body member having an upper horizontal supporting surface, and second .and third separate body members supported on said surface, a vertical air chamber in said second body member having a horizontal air inlet, a vertical air chamber in Said third bod?.v member provided with a horizontal air outlet, an air chamber in said rst body member disposed beneath said air chambers in said second and third body members, a communicating opening between said air chamber located in said first body member and each of said air chambers in said second and third body members, a valve controlling each of said openings, a second vertical air chamber in said third body member, a horizontal intercommunicating opening between said air chambers in said third body member, an exhaust port communicating with said second chamber in said third body member, and a valve in said last air chamber controlling said exhaust port.

9. The structure according to claim 8, wherein said exhaust port extends through said air chamber in said first body member.

References Cited in the flle of this patent UNITED STATES PATENTS 583,632 Roesch June 1, 1897 1,258,342 Justen Mar. 5, 1918 1,488,013 Lundblad Mar. 25, 1924 1,606,426 lusten Nov. 9, 1926 1,610,811 Nordstrom Dec. 14, 1926 1,751,276 Karibo Mar. 18, 1930 2,332,739 Mott Oct. 26, 1943 2,380,745 IFrantz July 31, 1945 2,399,756 Mott May 7, 1946 2,592,352 Speck Apr. 8, 1952

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