Elevator – industrial lift truck – or stationary lift for vehicle – Having specific load support drive-means or its control – Includes fluid supporting ram in drive-means
Patent
1994-01-05
1996-03-26
Terrell, William E.
Elevator, industrial lift truck, or stationary lift for vehicle
Having specific load support drive-means or its control
Includes fluid supporting ram in drive-means
187414, 92144, 4052111, 405216, B66B 904
Patent
active
055012990
ABSTRACT:
The surface of a hydraulic cylinder is enclosed with a cylindrical casing. A fluid, preferably a thixotropic dielectric hydrophobic fluid which retains a gel structure when static, has a specific gravity greater than water and inhibits bacteriogenic and aqueous corrosion fills the annular space between the cylinder surface and the casing, preventing water that may be rich in bacteria, from reaching the cylinder surface. A fluid conduit between the annular space and a reservoir is provided and the fluid fills the reservoir to a predetermined level such that water, hydraulic fluid or another fluid in the system may be detected by a rise in the predetermined level. The water or hydraulic fluid can be easily removed as it will float on the top of the fluid in the reservoir.
REFERENCES:
patent: 2933068 (1960-04-01), Johnson et al.
patent: 3630037 (1971-12-01), Howard
patent: 3956934 (1976-05-01), White
patent: 4565468 (1986-01-01), Crawford
patent: 4792289 (1988-12-01), Nieratschker
patent: 5076146 (1991-12-01), Bialy et al.
patent: 5105664 (1992-04-01), Wagner
Reichard Dean A.
Terrell William E.
U.S. Elevator
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