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US 2012/0073133 A1Published application
Piston for a hydraulic motor having radial pistons, and a method of manufacturing such a piston
AssigneePoclain Hydraulics Industries
InventorsGilles LEMAIRE, Alain NOEL
Life of this patent
Estimating the term…
Abstract
A piston for a hydraulic motor including a body having a guiding and sealing surface, a base, and a top, which top is providing with a cradle-shaped recess. The base is provided with an additional cradle-shaped recess whose concave surface faces in the direction in which the concave surface of the recess in the top faces.
Claims3
A method of manufacturing pistons for a hydraulic motor having radial pistons, the method comprising the steps of:
- providing longitudinal axis,
- machining cylindrical transverse holes at regular intervals in the bar, and,
- in order to form two adjacent pistons, cutting up the bar on a transverse cutting-up plane passing through a hole, so that a first portion of said hole forms a cradle-shaped recess in the base of the first one of the two adjacent pistons and so that another portion of said hole forms a cradle-shaped recess in a top of the second one of the two adjacent pistons.
Dependencies are inferred from the claim text.