Oil pressure device

Details Oil pressure device Oil pressure device

2001-01-25

2003-02-18

Bray, W. Donald (Department: 3725)

Presses

Reciprocating press construction

Fluid pressure actuation

C060S301000, C091S224000, C137S087010, C100S269180

Reexamination Certificate

active

06520076

ABSTRACT:

BACKGROUND OF THE INVENTION
The present invention relates to an oil pressure device. More particularly, the present invention relates to an oil pressure device which is disposed on a hoist frame.
Referring to
FIG. 8
, a conventional oil pressure pump
60
; is disposed on a hoist frame
10
. The hoist frame
10
has an upper panel
40
and a middle panel
20
. An oil cylinder
50
is disposed on the upper panel
40
. A mold
501
is disposed on a bottom of the upper panel
40
. Two mounts
30
are disposed on the middle panel
20
. A working piece
70
is disposed on the mounts
30
. A handle
601
is connected to the oil pressure pump
60
. An oil pipe
80
is connected to the oil pressure pump
60
and the oil cylinder
50
. The handle
601
should be operated manually.
SUMMARY OF THE INVENTION
An object of the present invention is to provide an oil pressure device which is operated easily.
Accordingly, an oil pressure device is disposed on a hoist frame. The hoist frame has an upper panel and a middle panel. An oil cylinder is disposed on the upper panel. A mold is disposed on a bottom of the upper panel. Two mounts are disposed on the middle panel. The oil pressure device comprises a pneumatic pump having a lower cover and a pneumatic cylinder, a base seat disposed on the pneumatic cylinder, the lower cover disposed on a bottom of the pneumatic cylinder, an oil tank disposed on the base seat, and an oil pump connected to the base seat. The oil pump has a piston shaft. A handle is connected to the piston shaft. The base seat has an oil sucking channel. An oil pipe is connected to the base seat and the oil cylinder. The oil pipe communicates with the oil sucking channel of the base seat. The lower cover has a guide channel, a valve plug, a through aperture for receiving the valve plug, an inner chamber, an inlet channel, an outlet channel, a plurality of vent holes communicating with the outlet channel, and a valve piston disposed in the inner chamber. The pneumatic cylinder has an inner pump connected to the base seat, a piston rod passing through the inner pump, a pneumatic piston connected to the piston rod, and a spring surrounding the inner pump and the piston rod.


REFERENCES:
patent: 3456297 (1969-07-01), Andreasson
patent: 5449051 (1995-09-01), Liao
patent: 6415704 (2002-07-01), Wang

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