Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
F03C1/00—Reciprocating-piston liquid engines
F03C1/013—Reciprocating-piston liquid engines with single cylinder, single-acting piston
F03C1/0135—Reciprocating-piston liquid engines with single cylinder, single-acting piston with actuation of the return stroke by gravity