Valve cover fastener and method

Internal-combustion engines – Frame construction – Horizontal cylinder

Reexamination Certificate

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Details

C123S090380, C411S536000, C411S350000, C403S337000, C403S408100

Reexamination Certificate

active

07051695

ABSTRACT:
A valve cover fastener includes a bolt including an elongated threaded rod and a bolt head. The rod has a bottom end and a top end. The bolt head is integrally coupled to the top end. A nut is threadably coupled to the rod such that the nut is positioned between the bolt head and the bottom end of the rod. The bottom end of the bolt may be extended through a valve cover and a gasket and threadably coupled to an engine block so that the nut abuts the gasket. A spring is positioned on the bolt. The spring has a generally frusto-conical shape. An upper end of the spring has a smaller diameter than the bolt head. The upper end abuts the bolt head and the lower end abuts the gasket such that the spring biases the gasket away from the bolt head.

REFERENCES:
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patent: 4027644 (1977-06-01), Timour
patent: 4066058 (1978-01-01), Anderkay
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patent: 4456268 (1984-06-01), Penn et al.
patent: 5184698 (1993-02-01), Coffenberry
patent: 5209018 (1993-05-01), Heinrich
patent: 5628601 (1997-05-01), Pope
patent: 5655489 (1997-08-01), Kammerer et al.
patent: 5702218 (1997-12-01), Onofrio
patent: 6338591 (2002-01-01), Lilienthal, II

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