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US 4,526,086 AGranted
Piston-cylinder assembly
AssigneeDavy-Loewy Limited
InventorsJames A. Holton, James C. Inman
Life of this patent
Estimating the term…
Abstract
A piston-cylinder assembly for displacing a load through a long stroke consists of a rod, a piston slidable on the rod and by fluid pressure the piston is clamped to the rod, and a cylinder in which the piston is contained. By clamping the piston to the rod and introducing fluid into the cylinder, relative movement is caused between the piston and cylinder and the rod. When one assembly is used, the movement is intermittent but, by mounting two pistons on the rod, each piston being in a separate cylinder, and by controlling the flow of fluid, the movement is continuous.
Claims16
A piston-cylinder assembly, comprising:
- a rod;
- a pair of pistons relatively movable with respect to said rod;
- clamping means for clamping each of said pair of pistons to said rod;
- a pair of cylinders, relatively movable with respect to said rod, for housing said pair of pistons, respectively;
- means for introducing and exhausting pressurized fluid to and from said pair of cylinders and said pair of piston clamping means;
- and
- means cyclically controlling the flow of said pressurized fluid to and from said pair of cylinders and said pair of piston clamping means for moving said pair of pistons relative to said pair of cylinders and sequentially actuating only a first one of said pair of piston clamping means, both of said pair of piston clamping means, only the second one of said pair of piston clamping means, both of said pair of piston clamping means, and only said first one of said pair of piston clamping means, so as to provide said relative movement between said pair of cylinders and said rod.
4 more elements
Dependencies are inferred from the claim text.