Spring devices – Coil – Circular
Patent
1981-07-27
1983-11-01
Reger, Duane A.
Spring devices
Coil
Circular
423449, C01B 3102
Patent
active
044126751
ABSTRACT:
A carbon spring composed substantially of carbonaceous carbon or graphite carbon is prepared by shaping an organic linear material to a coiled spring and thereafter heating it to carbonize.
REFERENCES:
patent: 3423496 (1969-01-01), Olstowski
patent: 3956436 (1976-05-01), Honda et al.
patent: 4080417 (1978-03-01), Kishimoto et al.
patent: 4293533 (1981-10-01), Asano et al.
Mitsubishi Pencil Co. Ltd.
Reger Duane A.
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