US1755403A - Hydraulic press - Google Patents

Description

April 22, 1930. I R. E. MANLEY 1,755,403

HYDRAULIC PRESS Filed Jan 5, 1926 5 Sheets-Sheet 2 ambanto a.

Mei! 331d R. E, MANLEY April 22, 1930.

HYDRAULIC PRESS- wed Jan 5, 1926 :5 Sheets-Sheet s anvemfo'ar Patented Apr. 22, 1930 UNITED STATES PATENT OFFICE ROBERT E. MANLEY, OF YORK, PENNSYIJVANIA, ASSIGNOR TO MIANLEY MANUFAC- TURING COMPANY, OF YORK, PENNSYLVANIA; A CORPORATION OF DELAWARE HYDRAULIC PRESS Application med January 5, 1926. Serial No. 79,434.

This invention relates to presses and has for its principal object the provision of an efficient hydraulic press suited for garage use.

A further object of the present invention lies in the provision of a hydraulic press which can rapidly be positioned and which may be operated at either high or low speed.

A still further object of the present invention is the provision of means for avoiding leakage of oil from the press to the work.

In the drawings Figure 1 is an elevation of a hydraulic press embodying the present invention. I

Figure 2 is a cross section thru the ram and pump cylinders.

Figure 3 is a vertical section thru the two flanges of the pump.

Figure 4 is a top plan view of the pump mechanism.

Figure 5 is a side elevation showing a pump lever with its link and associated mechanism.

The press stand is preferably of usual type constructed from commercial metal sections as for example, the two channel feet 10 to each of which is secured a pair of vertical angle uprights 11 connected midway of their length by the heavy channels 14 which under certain circumstances form a bed. At the top of the uprights 11 are the two channels 16 bolted to the uprights 11 as at 17 and having their side flanges parallel and horizontal forming the usual body of the press' To these members 16 ofthe main bed or table are secured the uprights 20 carrying at their top two opposed channel members 22 forming the support for the ram cylinder 30 which preferably has heavy integral lugs 31 bolted to the lower flange of the beams 22.

To one side of the uprights 20 and supported from the channels 22 is an oil tank 36 in which are two pump cylinders 40 and 41, the latter having a considerably larger bore and plunger than the pump 40. Individualfly these pumpsare old and well known and I claim only their arrangement in the tank 35 and their twin arrangement to dischargeindividually or collectively to the 'ram. I

' mount between the two cylinders a check body 43 having a spring pressed'ball valve 44 pipe 54 is in, can be used alone.

The valve body 44 communicates with a pipe 56 leading to the top of the ram cylinder 30 and a pipe 58 leads from the pipe 56 back to the tank, and it is controlled by a valve 60 which is opened to permit return of fluid from the top of the ram to the reservoir or tank 35. The type of each'valve is unimpor-- tant but is preferably such as to open automatically upon excessive pressure in the ram cylinder and to be opened manually to raise the ram.

In addition to the sturdy lugs 31 near the bottom of the ram cylinder 30 I provide two smaller lugs 62 at the top of the cylinder, and in these lugs Imount threaded'hooks 64 to which are secured springs 65 secured to a yoke fast to the ram 71, so as -to cause the ram to receive the discharged fluid back into the reservoir when the valve 60 has been opened.

A very important feature of the present invention is the provision of a screw threaded into the ram. This screw 73 naturally has square threads and is splined to the hub 74 of a hand wheel 75 rotatably mounted on ball bearings 76 between the annular flange 77 of the hub and a loose collar 78 suspended from the yoke 70 by means of screws 79, the yoke 70 being secured directly to the-ram as by the countersunk screws 80. As the parts are shown in Figure 2 the ram and a screw are each at their highest points giving maximum clearance between the bed or anvil and whatever tool is secured to the screw 73. By turning the hand wheel 75 the screw 73 may be lowered with respect to the ram in an extremely rapid manner. and this will allow the ram to have its full travel if desired after the screw has been brought into contact with the work.

At the bottom of the ram I provide the usual stufling box 85 and above the packin 86 I form a groove 87 in the ram cylinder an I bore a passageway 88 thru the cylinder to a tapped hole recelving a nipple '89 'oined by a union 90 to at small tube 91 .leadmg to the oil tank 35. By means of this very important feature I remove all possibility of 'oil leaking past the packing 86 and getting on the work as communication between the oil groove 87 and the reservoir is free and unrestricted. No matterhow carefully the cup washer 93 at the topof the ram be fitted there is always leakage around the ram and the provision of the oove 87 entirely eliminates the possibility c this escaping oil reaching Q the work.

The operation of the device is as follows The work is placed directly on the bed formed either by the channels 14 or 16 or uponan anvil of any form (not shown) placed on lonej' or the other of these beds and the hand wheel is rotated to bring the tool carried b the screw 73 into contact with the work. f the distance between the work and the'tool-is not too great the movement of the hand wheel will be all thatis necessary; if not the screw.

can be lowered to its-safe limit and then the ram is lowered the rest of the way by. placing the handle 54 in the socket of one of the pumps for example, the socket 48 and conling together the two pumps to give a very arge volume of oil. Assuming that the pressure r uired' will be heavy the pin 52 is now remove and the smaller pump is used alone.

In case the work' was not quite so heavy the handle 54 would have been put in the other which time the two springs upward carrying with it the wheel, colsocket so that, when contact was made,- the required bending or pressing could be the more quickly accomplished. It should be understood the pin 52 is entirely optional and the larger pump may be made of such size as to pump suflicient quantity for any use that might be expected. When the pressing has 3. In a press, a ram cylinder a ram, means for telescoping the ram into the cylinder, a screw in said ram, and means carried by said telescoping means for causing relative movement between the screw and the ram.

4. In combination, aram cylinder, a ram,-

a screw threaded into said ram, a yoke secured to said ram, means for causlng said yoke .to telescope the ram into its cylinder, a collar carried by said yoke, a hand wheel rotatably mounted in said collar, and no'n-rotatably secured tosaid screw.

5. In a garage press, a vertically positioned ram cylinder in which the pressure fluid is admitted at the top of the cylinder above the ram, a ram slidable in the cylinder, a pressing screw carried by the ram adapted toengage work beneath the ram, manually operated means below the ram for moving the screw longitudinally of the ram for quick adjustment with respect to the work, and means bc-' low the pressure head of the ram and near the lowerend of the cylinder for collecting. the liquid whichleaks downwardly past the pressure head of the ram and for discharging such liquid to one side of the cylinder so as to avoid the soiling of the work and of the manually operated means b such leakage.

In testimony whereof I a x my signature.

ROBERT E. MANLEY.

been completed the valve 60, preferably pr'ovided with a handle as shown is opened at draw theyoke coaxial with said ram, a yokesecured to said ram,'and mean's carried by said yoke for causmg relative movement between the ram and

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