摘要 |
A pre-assembled valve mechanism for use in valve controlled internal combustion engines and the like which is constructed and arranged to be installed and removed quickly as a unitary module with minimum effort and expenditure of time; the module comprising a cylindrical housing with valve seat and exhaust port, a headed valve cooperable with the seat, a valve guide, a return spring and a valve actuating cam follower coaxially mounted in operating position with the housing.
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