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US 6,274,083 B1Granted
Method of producing a hollow piston for a hydrostatic power unit
AssigneeSauer-Danfoss Inc.
InventorErnest Burdell Clark, III
Life of this patent
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Abstract
A method of manufacturing a hollow piston including: fixing a core insert formed of a non-metallic material in a desired location within a mold cavity, injecting a mixture of non-metallic binder material and metal particles into the cavity so as to surround at least a portion of the core insert and form a piston, and eradicating the core insert from the piston.
Claims10
A method of producing a hollow piston comprising:
- forming a core insert of non-metallic material;
- securing the core insert within a cavity of a die or mold, the cavity being larger than the core insert;
- filling the cavity with a mixture of non-metallic binder material and metal particles so as to surround at least a portion of the core insert to form a piston;
- eradicating the core insert from the piston so as to leave a void in the piston;
- and
- elevating the temperature of the piston to a temperature sufficient to debind the non-metallic binder material from the metal particles and metallurgically bond the metal particles to each other.
3 more elements
A method of manufacturing a hollow piston comprising:
- fixing a core insert formed of a non-metallic material in a desired location within a mold cavity;
- injecting a mixture of non-metallic binder material and metal particles into the cavity so as to surround at least a portion of the core insert and form a piston;
- and
- eradicating the core insert from the piston.
1 more element
Dependencies are inferred from the claim text.