Method of manufacturing a piston for a hydraulic motor having radial pistons
AssigneePoclain Hydraulics Industrie
InventorsGilles Lemaire, Alain Noel
Life of this patent
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Abstract
A method for manufacturing radial pistons for a hydraulic motor by machining cylindrical transverse holes at regular intervals in a bar, and, in order to form two adjacent pistons, cutting up the bar on a transverse cutting-up plane passing through one of said holes 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 the top of the second one of the two adjacent pistons.
Claims3
A method of manufacturing pistons for a hydraulic motor having radial pistons, each piston having a base, a top and a cradle-shaped recess, the method comprising the steps of:
- providing a cylindrical bar having a longitudinal axis,
- machining cylindrical transverse through holes spaced apart uniformly in the bar, and
- in order to form two adjacent pistons, cutting up the bar on a transverse cutting-up plane passing through one of said holes, so that a first portion of said hole forms a cradle-shaped recess having substantially the shape of a fraction of a cylinder 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 having substantially the shape of a fraction of a cylinder in a top of the second one of the two adjacent pistons.
Dependencies are inferred from the claim text.