F - Mech Eng,Light,Heat,Weapons – 15 – B
Patent
F - Mech Eng,Light,Heat,Weapons
15
B
103/142
F15B 15/18 (2006.01) F04B 47/04 (2006.01)
Patent
CA 1286152
ABSTRACT A pumping unit particularly for pumping oil from an oil bore has an inner stationary cylinder unit and an outer cylinder unit reciprocatable relative to the inner unit by hydraulic fluid; the units are enclosed in a casing and the outer unit functions as a piston in the casing; as the outer unit moves downwardly in the down-stroke, under the action of gravity and hydraulic fluid, air in the casing beneath it is displaced into a reservoir to form a supply of pressurized air; in the upstroke the supply of pressurized air is exploited to drive the outer cylinder upwardly, aided by the hydraulic fluid.
523830
Mestieri Renzo
Swabey Ogilvy Renault
LandOfFree
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