Expansible chamber devices – Piston – With ported chamber in piston part for circulating heat...
Reexamination Certificate
2005-09-06
2005-09-06
Look, Edward K. (Department: 3745)
Expansible chamber devices
Piston
With ported chamber in piston part for circulating heat...
C092S218000, C092S256000
Reexamination Certificate
active
06938537
ABSTRACT:
A piston for an internal combustion engine which comprises a piston body, and a ring element, which together form a basic piston body. When the ring element is screwed onto the piston body, it forms a ring shaped cooling channel which is closed off in a direction of the pin bosses by a projection of the basic body. The projection is structured in the form of an elastically resilient cup spring which is deformed when the ring element is screwed onto the body. This deformation and counter stress, contributes to the strength of the screw connection.
REFERENCES:
patent: 4286505 (1981-09-01), Amdall
patent: 5081968 (1992-01-01), Bruni
patent: 5261363 (1993-11-01), Kemnitz
patent: 6003479 (1999-12-01), Evans
patent: 6026777 (2000-02-01), Kemnitz et al.
patent: 6286414 (2001-09-01), Kruse
patent: 198 46 152 (1998-10-01), None
Leslie Michael
Look Edward K.
MAHLE GmbH
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