Power plants – Pressure fluid source and motor – Ram driven by fluid pumped from reservoir
Reexamination Certificate
2006-02-07
2006-02-07
Lopez, F. Daniel (Department: 3745)
Power plants
Pressure fluid source and motor
Ram driven by fluid pumped from reservoir
C060S482000
Reexamination Certificate
active
06993905
ABSTRACT:
An oil hydraulic cylinder configured to allow an object to be smoothly and continuously lifted without being clatteringly swayed and unnecessarily rotated by the oil hydraulic while supply of the oil hydraulic remains uninterrupted when an adjusting lever is manipulated for lifting and lowering operations, the cylinder comprising: a cap part protrusively formed thereon with a compression unit for forcibly generating oil pressure, an operation unit fixedly connected to an object for lifting, stopping and lowering the object and an adjusting unit for controlling the lifting, stopping and lowering of the object; a body part connected inside a body case to the compression unit, the operation unit and the adjusting unit and formed with a plurality of cylinders and pistons for carrying out an oil pressing operation; a base part coupled underneath the body part and formed therein with a predetermined flow route; an oil control part for controlling oil flowing in an oil route formed inside the base part; and a manipulating unit disposed at one side of the cap part for simultaneously controlling the compression unit, the operation unit and the adjusting unit.
REFERENCES:
patent: 644641 (1900-03-01), Sibley
patent: 1999848 (1935-04-01), Ries
patent: 3146592 (1964-09-01), Johnson
patent: 3230712 (1966-01-01), Redfield
patent: 6155642 (2000-12-01), Kawakami et al.
Hwang Myung-Yong
Lee Keun-Jong
Min Kyung-Han
Lopez F. Daniel
St. Onge Steward Johnston & Reens LLC
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