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US 2016/0201461 A1Published application
Piston Unit and Hydrostatic Radial-Piston Machine
AssigneeRobert Bosch GmbH
InventorsAdam MacPhee, Geoffrey Kermode, Kevin Kilroy
Life of this patent
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Abstract
A piston unit includes a piston which has a rolling element seat configured to rotatably support a rolling element. The rolling element seat has a bearing surface with a surface coating composed of a polymer compound or with a ceramic surface coating.
Claims11
A piston unit of a hydrostatic machine, comprising:
- a piston including a rolling element seat configured to rotatably support a rolling element, the rolling element seat including a bearing surface,
- wherein the bearing surface has one of a surface coating composed of a polymer compound and a ceramic surface coating.
A hydrostatic radial-piston machine, comprising:
- at least one piston unit including a piston, the piston having a rolling element seat configured to rotatably support a rolling element,
- wherein the rolling element seat includes a bearing surface having one of a surface coating composed of a polymer compound and a ceramic surface coating, and
- wherein the at least one piston unit is guided in a cylinder bore of a cylinder block.
Dependencies are inferred from the claim text.