US1049451A - Valve mechanism. - Google Patents

Description

'S. S; CASKBY.

VALVE MECHANISM.

APPLICATION FILED APR. 9, 1910.

1,049,451. I Patented Jan.'?, 1913.

4 SHEETS-SHEET 1'.

ii Eli IIIHM L I H LL H oooooooooooooooooooooooooooooooooooo S. S. GASKEY.

VALVE MEGHANISM.

' APPLICATION FILED APR.9, 1910.

. 1,049,451. Patented Jan. 7, 1913.

4 SHEETSSHEET 2.

. 4 I H v WITNESSES g \Iffi: 7 gVENTUR W0 2mwf S. S. CASKEY.

VALVE MECHANISM.

APPLIOATION FILED APR. 9, 1910.

1,049,451 Patented Jan. 7, 1913.

COLUMBIA PLAN c S. S. OASKEY.

VALVE MECHANISM.

APPLICATION FILED APR.9, 1910.

1,049,45 1 Patented Jan. 7, 1913.

4 SHEETS-SHEET 4.

42? 42 i 4a 4" WlTNESSES 4/ (NVENTOR I BY 5M WNFFED @TATES PATENT @FFlCE.

SAMUEL'S. CASKEY, 0F PHILADELPHIA, PENNsYLvANIApAsSIGNoR TO GASKEY VALVE COMPANY, OF l-IOLMESBUHG, PHILADELPHIA, PENNSYLVANIA, A COR- PORATION 0F NEW YOEK.

VALVE MECHANISM.

Specification of Letters Patent.

Patented Jan. '7, 1913..

Application filed April 9, 1910. Serial No. 554,323.

To all whom, it may concern:

Be it known that I, SAMUEL S. Casnnr, a citizen of the United States, residing in the city and county of Philadelphia, State of Pennsylvania, have invented a new and useful Valve Mechanism, of which the following is a specification.

This invention relates to hydraulic ram mechanisms and more particularly to a means for controlling and operating a ram through the medium of a novel type of valve construction to withstand high pressure andwvherein the moving parts of the valve are power governed and permit of easy and sensitive control of the valve at any suitable distance therefrom.

The invention consists further of a novel pilot valve mechanism by means of which the main control valve is regulated and operated at the proper time to introduce the fluid pressure into the ram for a forward or return stroke of the same.

The device is particularly adapted for use in connection with hydraulic rams, such as used in high pressure pipe or tube manufacture, elevator practice or other kindred uses.

It further consists of other novel features of construction, all as will be hereinafter fully set forth.

For the purpose of illustrating my invention, I have shown in the accompanying drawings one form thereof which is at present preferred by me, since the same has been found in practice to give satisfactory and reliable results, although it is to be understood that the various instrumentalities of which my invention consists can be variously arranged and organized and that my invention is not limited to the precise arrangement and organization of these instrumentalities as herein shown and described.

Figure 1 represents a side elevation of a ram cylinder, broken away, and the device embodying my invention secured thereto. Fig. 2 represents a bottom plan of the same. Fig. 3 represents a bottom plan of the valve mechanism. Fig. 1 represents an end elevation of the same. Fig. 5 represents a side elevation showing the valve control mechanism. Fig. 6 represents in plan a portion of the valve control mechanism. Fig. 'Z repre sents a section on line a2-a=, Fig. 6. Fig. 8 represents an end elevation of the mecha nism shown in Fig. 6. Fig. 9 represents a section on line y-y, Fig. 6. Fig. 10 represents an end elevation of the pilot valve. Fig. 11 represents a longitudinal section of the same. Fig. 12 represents a side elevation partly in section of the main control valve. Fig. 13 represents an end elevation, partly in section, of the same. Figs. 1 1 to 18 inclusive represent diagrammatically my valve control mechanism in different positions.

Similar numerals of reference indicate corresponding parts in the figures.

Referring to the drawings :1 designates a pipe forming in the present instance the cylinder of a hydraulic ram, of which 2 is the piston and 3 the piston rod, all being of well known construction. As here shown, the cylinder 2 has secured thereto an apertured plate 4 for the purpose of supporting a novel valve mechanism now to be de scribed. This valve mechanism consists of a casing 5 having apertured ears 6 preferably integral therewith and by means of which the casing 5 is mounted upon the plate 4, suitable stud bolts 7 or the like being utilized as will be apparent. The casing 5 is bored out to receive a closure plug 8 and it will be noted that the bored portion has a three-way communication with the exterior of the casing, these communications, as here shown, consisting of an inlet port 9, an outlet port 10 and an exhaust port 11. In order to establish a flow of fluid between any two of these ports the plug 8 has therein a passage 12 preferably T-shaped as in the ordinary three-way valve construction. It will thus be apparent that by turning the plug 8 the inlet port 9 may be connected to deliver fluid direct to the outlet port 10 and then the exhaust port is closed, and piston 2 will move downwardly. If desired, the outlet port 10 may be thrown into communication with the exhaust port 11 while the inlet port 9 is e11- tirely cut off, and then the piston 52 moves upwardly due to the differential area. As here shown, an inlet pipe 13 is suitably scoured to the casing 5 in alinement with the inlet port 9 and is also connected to the cylinder 1 at a suitable point to admit fluid pressure at one side of the piston 2.

14 designates a supply pipe connected to a suitable fitting 15 in the inlet pipe 13 and to this arrangement of the fluid pressure conduit, since one side of the piston 2 is thereby always subject to the line pressure while the opposite side is subjected thereto a only at certain times, as determined by the position of the valve plug 8 as above de-' scribed. The piston 2 is, in fact, a differential one and operates as well known through the same pressure applied to varying areas.

In connection with the inlet port 9 it will be noted that a sealing bushing 17 is utilized to prevent leakage around the plug 8 and its inner face corresponds in shape to the contour of the surface of the plug 8, with which it preferably makes a ground joint. This bushing 17 is maintained in operative position preferably by a collar 18 threaded into the casing 1 and a spring 19, as will be apparent.

In valves designed for high pressure work it often becomes diflicult to manually operate the closures at the proper time for the reason that should there be any sticking due to sediment, scale or the like, the pressure of the fluid makes it practically impossible to open or close the valve at the time desired. In order to obviate such defects of operation, I have devised an auxiliary mechanism operating in conjunction with the valve mechanism above described, wherein the latter is positively controlled and may be manipulated surely and quickly.

The plug 8 is provided with the usual stems 20, here shown as projecting exterior of the casing 5, and packed by means of a suitable stufling box structure 21. Cap plates 22 are provided on each side of the casing 5 to permit access to the interior of the casing 5 and allow assembling and disassembling of the parts. Each plate 22 is secured in position by means of studs 23 or like fastening devices.

24 designates a gear segment secured by akey 25 or the like to one of the plug stems 20 and serving as a power transmitting means to cause a turning of the valve plug 8. This segment 24 is secured in operative position by means of a nut 26and cotter pin 27, though, of course, any well known fastening means may be employed. In the present instance, a lug 28 is formed integral with the segment 22 for a purpose to be presently described, and as here shown, this lug 28 is internally threaded as at 29 to receive a coiiperating member.

30 designates a piston rod carrying the piston 31 and has formed thereon rack 32 normally in mesh with the toothed segment 24. The piston 31 is slidingly mounted in a casing 33 secured by studs 34 to the casing 5 and forming the cylinder of an auxiliary motor for operating the main valve plug 8. It will be noted that the casing 33 is suitably cut away to receive the segment 24 and is also provided with a port 35 lead; ing back of the piston 31. This port 35 has connection through the pipe 36 with an auxiliary supply pipe 37 connected to the fitting 15 and receiving fluid pressure from the main supply pipe 14.

38 designates a pilot valve suitably secured to the casing 33 and having a bore 39 therethrough provided with an enlarged portion 40 therein to receive the plug 41 forming the closure of the valve.

42 designates the exhaust port of the valve 38, the same communicating with the interior of the valve and controlled by the movement of the plug 41. In the present instance the plug 41 has a three way opening 43 therein for obvious control purposes. As in the main valve 5, a sealing bushing 44 abuts the plug 41 and is similarly held by a spring 45 and threaded collar 46.

The opening and closing movement of the pilot valve 38 is controlled-by a lever system which alsooperates in conjunction with the main valve 5 and will now be described.

47 designates a rod pivotally secured at 48 to an arm 49 and of suflicient length to eX tend within reach of the operator of the mechanism. As here shown, the arm 49 is pivoted at 50 to a link 51, keyed to the stem 52 of the pilot valve plug 41, thus it- Will be seen that any movement of the rod 47 efl'ects a shifting of the pilot valve plug 41.

In the operation of the valve mechanism the rod 47 is shifted toturn the pilot valve plug 41 to the position indicated in Fig. 14, the main valve being closed as shown in dotted lines. During this movement the lever mechanism is swung about the point 53 as a fulcrum, and as soon as the pilot valve 41 has been turned, the pressure fluid acts on piston 31, and through the rack 32 and segment 24 swings the valve plug 8 to the position shown in Fig. 15. This movement shifts the lever mechanism about the point 48 as a fulcrum and closes the pilot valve 41 as will be apparent. When it becomes necessary to close the main valve 8 the rod 47 is shifted in the opposite direction to bring the parts into the position shown in Fig. 18. In this position the cylinder 33 is exhausting through port 42 and pressure normally passing through port 35 act-s on the piston 31 and thus shifts the rack 32 to close the valve 8. The closing of the main valve shifts the lever mechanism about the point 48 as a fulcrum and the parts assume the position of Fig. 16. At this time the fluid pressure on the smaller area of main piston 2 returns the ram to normal position, while the opposite end of the cylinder 1 is exhausting through port 11. The auxiliary pressure control mechanism operates the main valve substantially simultaneously with the shifting of the pilot valve 41, the effect being that a positive movement of the main valve is obtained for the slightest shifting of the manually operated lever 4L7. That is to say, if the lever 47 is moved to crack the pilot valve 41, the main valve 8 will also be cracked, thus it will be seen that the valve 8 is manipulated with the same precision as if directly connected to the hand lever 47.

It will now be apparent that I have devised a complete unitary structure operating effectively for the purpose intended and whereby the valve mechanism of the hydraulic ram may be operated with extreme ease, and furthermore its action is positive and sure.

It will now be apparent that I have devised a novel and useful construction of a valve which embodies the features of advantage enumerated as desirable in the statement of the invention and the above description, and while I have, in the present instance, shown and described a preferred embodiment thereof which has been found in practice to give satisfactory and reliable results, it is to be understood that the same is susceptible of modification in various particulars without departing from the spirit or scope of the invention or sacrificing any of its advantages.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, 'is:

1. In a device of the character stated, a ram, a valve casing secured thereto, a rotatable plug in said casing, a pressure operated piston slidingly mounted adjacent said plug, means to transmit movement of said piston to said plug, a pilot valve to control a supply of fluid pressure to said piston, means to open said pilot valve to admit fluid pressure to said ,piston, and means operated by said rotatable plug to close said pilot valve.

2. In a device of the character stated, a ram, a valve casing secured thereto, a rotatable plug in said casing, a pressure operated piston slidingly mounted adjacent said plug, means to transmit movement of said piston to said plug, a pilot valve to control a supply of fluid pressure to said piston, and a plurality of levers connected to said valves whereby said pilot valve is opened by the movement of one lever and closed by the movement of said rotatable plug.

3. In a device of the character stated, a hydraulic motor comprising a cylinder and a piston, a pressure fluid by-pass communicating with said cylinder on opposite sides of said piston, a valve casing located in said by-pass, a rotatable valve in said casing, a pilot valve adjacent thereto, pressure operated means for operating said rotatable valve in one direction and controlled by said pilot valve, and manually operable means for moving said rotatable valve in the opposite direction.

l. In a device of the character stated, a hydraulic motor comprising a cylinder and a piston, a pressure fluid by-pass communicating with said cylinder on opposite sides of said piston, a valve casing located in said by-pass, a rotatable valve in said casing, a pilot valve adjacent thereto, connections between said valves whereby one movement thereof opens said pilot valve, another movement thereof closes both valves, and a third movement opens said pilot valve to an exhaust position.

5. In a device of the character stated, a hydraulic motor comprising a cylinder and a piston, a pressure fluid by-pass communicating with said cylinder on opposite sides of said piston, a valve casing located in said by-pass, a rotatable valve in said casing, a pilot valve adjacent thereto, an auxiliary cylinder controlled by said pilot valve, a piston slidingly mounted in said cylinder and operatively connected with said rotatable valve, connections between said valves, whereby one movement thereof opens said pilot valve to admit pressure fluid to said auxiliary cylinder to actuate said piston to open said rotatable valve, a second movement thereof closes said pilot valve, and a third movement of said connections closes said rotatable valve and opens said pilot valve to exhaust said auxiliary cylinder.

SAMUEL S. CASKEY.

Witnesses:

Ronnn'r M. BARR, C. D. McVAY.

copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.- Washington, 1). G.

Images