Spring retainer and spring system

Details Spring retainer and spring system Spring retainer and spring system

2011-08-16

2011-08-16

Denion, Thomas E (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

With nonvalving movement

C074S088000, C251S337000, C123S090670

Reexamination Certificate

active

07997242

ABSTRACT:
A spring retainer can reduce the set height and mass of a coil spring. The spring retainer has a retainer body attached to a stem end of a valve and a circumferential plate-like spring part having an inner circumferential part supported by the retainer body and resiliently supporting an end of the valve spring. A spring constant of the plate-like spring part is made higher than a spring constant of the valve spring, so that the plate-like spring part deflects after the valve spring is compressed, to provide a two-step load characteristic and reduce the set height, compressed height, and mass of the valve spring. It can also reduce the height and mass of the spring retainer. A spring system formed by combining the spring retainer and valve spring with each other will be compact and lightweight.

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