Expansible chamber devices – Relatively movable working members – Interconnected with common rotatable shaft
Patent
1997-01-08
1999-04-06
Lopez, F. Daniel
Expansible chamber devices
Relatively movable working members
Interconnected with common rotatable shaft
92248, F01B 300
Patent
active
058904131
ABSTRACT:
Disclosed is a piston for a water pump, e.g., a pressure washer pump. The piston includes a piston body and a piston head and in the improvement, the piston body is solid, homogeneous ceramic. That is, the piston body has a generally cylindrical surface and the body is circumscribed by the surface and is homogeneous ceramic. A method for making a piston for a water pump includes the steps of providing a piston body made of a ceramic material, and making a piston head of steel and having a pocket formed therein. The head is heated, the pocket and the body are engaged in overlapping relationship and the head is allowed to cool and "shrink-fit" to the piston body. The piston head is formed to have a relief groove circumscribing the pocket for reducing compression forces resulting from such cooling.
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Bayer Don
Hoenisch Herb
Kern Robert D.
Ruehlow Gerald C.
Sodemann Wes
Generac Portable Products, LLC
Lopez F. Daniel
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