Piston for hydrostatic axial and radial piston machines and meth

Details Piston for hydrostatic axial and radial piston machines and meth Piston for hydrostatic axial and radial piston machines and meth

1992-03-18

1993-06-08

Look, Edward K.

Expansible chamber devices

With lubricating means

Lubricant passage extends axially through articulated piston...

92254, 29888042, 29888046, 29888047, F01B 3110

Patent

active

052169430

ABSTRACT:
A method of manufacturing a piston for hydrostatic axial and radial piston machines by non-machining forming, by filling a material that is in a substantially unresistant, formable state into a mold defining a piston outer contour which is closed on all sides, in which at least one supporting core is arranged spaced from the inner contour of the mold to remain in the completed piston to define a core region in the interior of the piston that is closed on all sides, then solidifying the material forming a piston with high strength characteristics and low weight, and removing the completed piston with the enclosed supporting core. The invention also comprises a piston for a hydrostatic axial or radial piston machine, made integrally of high-strength material in a non-machining forming process, such as by casting, sintering or the like, having in its interior at least one core region surrounded by the high-strength material and containing a supporting core that is provided to take up forces acting on the piston when in operation and which, during formation of the piston defines the core region, which supporting core is lighter than the high-strength material it replaces in the core region.

REFERENCES:
patent: 3080854 (1963-03-01), Wiggermann
patent: 4494448 (1985-01-01), Eystratov et al.
patent: 5007332 (1991-04-01), Wagenseil
patent: 5038673 (1991-08-01), Schulze
Materials, Parts and Finishes, copyrighted 1984 by Technomic Publishing Co., pp. 378-379.
Goetzel, Cermets, vol. 7 of Metals Handbook, Ninth Edition, copyrighted 1984, American Society for Metals, pp. 798-800, 805-806.

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