Low-stress cam-driven piston machines

Motors: expansible chamber type – Three or more cylinders arranged in parallel radial or... – Radially disposed cylinders

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F01B 1306

Patent

active

040489060

ABSTRACT:
A hydrostatic piston-and-cylinder machine includes an array of cylinders and a piston movable in each cylinder, a sinuous cam track and a cam-follower associated with the pistons engaging the cam track in a manner such that the pistons move to and fro along the axes of their cylinders on movement of the cylinder array along the cam track. For the relief of stresses due to high mutual convexity of the cam and cam follower the cam is shaped to give a relatively low velocity change rate for the pistons along the cylinder bores when the cam follower is negotiating the crests of the cam and a relatively high velocity change rate when the cam follower is negotiating the troughs of the cam.

REFERENCES:
patent: 1723874 (1929-08-01), Lunge
patent: 1766610 (1930-06-01), Davis
patent: 2882831 (1959-04-01), Dannevig
patent: 2992619 (1961-07-01), Nilges
patent: 3046950 (1962-07-01), Smith
patent: 3151529 (1964-10-01), Leath
Selection of the Track, Profile for A Radial-Piston High-Torque Hydraulic Motor by Yu F. Ponamarento, published in Russian Journal, Dec. 1961.

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