US996692A

US996692A - Hydraulic compress with double-acting ram.

Info

Publication number: US996692A
Application number: US5540901A
Authority: US
Inventors: Samuel J Webb
Original assignee: Individual
Current assignee: Individual
Priority date: 1901-04-11
Filing date: 1901-04-11
Publication date: 1911-07-04
Anticipated expiration: 1928-07-04

Description

S. J. WEBB. HYDRAULIC GOMPRESS WITH DOUBLE ACTING RAM.

APPLICATION FILED APR.11, 1901.

Patented July 4, 1911.

coLUMmA ILANOORAIII 60.. WASHINGTON, I). c

SAMUEL J. WEBB, 0F MINDEN, LDUISIANA.

HYDRAULIC COMPRESS WITH DOUBLE-ACTING RAM.

Specification of Letters Patent.

Application filed April 11, 1901.

Patented July 4, 1911. Serial No. 55,409.

To all whom it may concern:

Be it known that I, SAMUEL J. WEBB, a citizen of the United States, residing at Minden, in the parish of Webster and State of Louisiana, have invented certain new and useful Improvements in Hydraulic Compresses with Double-Acting Rams, of which the following is a specification.

My invention relates to high pressure hydraulic presses, such for instance as are adapted for compressing bales of cotton and other material, which involve generally speaking a hydraulic compressing press and a double-acting hydraulic ram connected to operate the hydraulic press, and the object of the invention is to provide improved means of this general character, and the invention consists in the various features of construction and arrangement of parts, having the general mode of operation, substantially as hereinafter more particularly set fort Referring to the accompanying drawings: Figure 1 is a side view of a press and ram embodying my invention, parts of the press and ram being shown in section; Fig. 2 is an enlarged sectional View of one of the valves.

The apparatus as a whole comprises the press A, the hydraulic ram or pump B, and the operating engine 0 of the pump, the pump or ram receiving its water from a tank D, or from any other suitable source, and delivering the same to the cylinder or cylinders of the press A. The engine C may be of any suitable character, but as shown it is a steam engine with a cylinder 1 having detachable heads 2 and 3, a piston 4 and piston rod 5, which piston rod is continued to form the rod connected with the piston 6 of the ram B.

A construction which is most effective consists inanaking the cylinder 7 of the cam B with the inner head 8 in one piece with the body of the cylinder, the outer head 9 only being detachable, andintegral with the head 2 of the engine C is a circular bracket or support 10 which is bolted to theend 8 of the ram cylinder 7. By this means, theccylinder of the engine and of the ram are maintained in accurate alinement with each other and ready access may be had to the respective packing boxes without disturbing the other parts.

In order to avoid shocks or strains I provide means for butting or reducing the shock as the piston 4t approaches each end of the der through suitable cylinder, the same consisting in providing the piston rod 5 with a small subsidiary block or piston 12 at each side of the main piston 4, said piston being adapted to sockets or chambers m, with which communicate the ports of the engine, to and from which steam flows under the action of the valves 15, 16. As the piston 4 approaches either end of the cylinder, the piston 12 gradually closes the adjacent chamber m which is preferably slightly larger than the piston, and as the steam is compressed in the said chamber and flows gradually therefrom, it acts as a buffer to prevent shock. Whenever it is necessary, however, to start the piston in the opposite direction, the steam flows into the chamber m in the first instance so t t the piston 12 will pass readily therefrom.

The valves 15, 16 may be of any suitable construction, and as shown, they are operated by levers 18 connected together and to a rod 19 which extends to the hand lever upon the press.

The pump of ram B may be of any usual or suitable construction with one or more cylinders when desired, but as shown, consists, as before stated, of a single cylinder and piston, but with inlet and discharge ports at the opposite ends so that the water may flow from the tank or other source of supply D into either end of the cylinder and may be discharged from either end. In other words, the ram is a double acting ram in place of the usual single acting ram, whereby the water may be forced to the press A by the movement of the piston 4c of the engine in either direction. By this arrangement, I am able to get a multiplicity of pressures in the press cylinder, as I will now describe.

As shown, there are two discharge ports 3 a at the opposite ends of the ram cylinder, which communicate with a circulating pipe 20, and from the latter a pipe 61 extends to the press, and at proper points, as for instance, in the circulating pipe are arranged check valves 21, 22, the water being admitted to the opposite ends of the cylinports controlled by check valves 23.

The outer area of the piston 6 is, of course, not limited by the piston rod 5 like the area of the inner face of the piston, and consequently when the piston 6 moves outward under the operation of the piston 4, the energy of the latter is distributed over a to the press under a heavier pressure, and by then opening the valve 22 as the piston 6 aga n noves outward, the volume of water passed to the press is only equal tothat dis-1 placed by the piston rod 5 inasmuch as the portion of water at the outer side of the piston 6 will be carried through the circulating pipe 20 back to the cylinder below the piston 6, exceptsuch portion as cannot thus find its way back in consequence of the area occupied by the piston rod 5. There is therefore a limited quantity of water forced toward the press at this movement but at a very much higher pressure. I am thus en-.

filled to secure a multiplicity of pressures with the same apparatus, requiring only a mechanical manipulation of the valve 22 under certain conditlons.

Any suitable means may be employed for opening the valve 22 when required; as

shown, there is a lever 30 hearing on the valve stem and connected to a hand lever 31' by a rod 32, the said hand lever 31 arranged adjacent to the lever 60 upon the press.

Instead of using a single cylinder, I prefer to use a plurality of cylinders in the press, as thereby I am enabled to make them of smaller diameter than would otherwise be required and to bring the plungers within the lateral limits of the movable platen and am therefore able to make the latter narrower, which is exceedingly desirable in some forms of compresses not necessary to be here described. To insure the absolute alinement of all of the plungers, which is a matter of utmost importance when several are connected together, and also to avoid expense of construction, I form all of the cylinders in a single cylinder block I), cast integral in one piece and properly bored out to form the chambers adapted for the reception of the plungers 40 connected with the movable platen 41, the lower ends of the chambers being connected by suitable chan nels Z), which, as shown in Fig. 1, are

formed in the block b, with a suitable control valve 0, in the line of the pipe 61. This,

control valve as shown, is lifted by a lever 42connected by a rod 43, with an arm upon a hand lever 70 so that when the latter is Copies of this patent'may be obtained for manipulated, the valve 0 will be properly moved to permit the water to pass from the press to the tank D. s

In order to properly connect the cylinder block Z2 with the stationary platen 50, the said block is provided with bosses or projections 51, at the corners and these are recessed for the passage of the tie rods or bolts 52, which connect the block and the stationary platen together.

Either of the platens carries a face block or plate A, which as shown is a detachable platen plate provided with cross channels secured to the face of the movable platen 41. This plate 14, is of such thickness that when the two platens are in contact, the ends of the'plungers will yet be within the chambers or cylinders. When, however, the plate or block 44 is removed, the movable platen may be moved far enough toward the platen 50 to carry the ends of the plungers out of the cylinders to permit the packings to be inserted or for repairs. lVhile this block is shown as upon the movable platen, it may be upon the stationary platen.

lVithout limiting myself to the precise construction and arrangement of parts shown, I claim as my invention:

1. The combination in a hydraulic press, with a ram for operating the press, having a double acting piston in its cylinder and a by-pass pipe connecting the space on each side of the piston, the bypass being provided with automatic check valves, and means for positively operating one of the check valves for the purpose described.

2. In a press, a ram having a hydraulic cylinder with a double-acting piston, and a by-pass pipe outside of the cylinder connecting the opposite ends of the cylinder, with two check valves in said by-pass pipe and means for positively operating one of the valves.

3. The combination in a hydraulic press, of a hydraulic cylinder, a piston therein, a piston rod extending through one end of the cylinder, discharge pipes from opposite ends of the cylinder connected with the press and each havmg a check valve closing aga nst back pressure, means for positively opening the lower check valve, and a circulating pipe connecting with discharge pipe s beyond said valves.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

/ SAMUEL J. WEBB;

Witnesses:

F. L. FREEMAN, WV. CLARENCE DUVALL.

five cents each, by addressingrthe Commissioner of Patents, Washington, D. G.