Title: Piston ring

Abstract: The disclosure embraces a piston ring particularly an oil control ring comprising a spacer-expander ring in association with one or more rails, ring segments or sealing rings wherein the spacer-expander ring component is configurated for preventing or minimizing necklacing during installation of the ring construction in the ring groove of a piston.

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Inventors: Nisper, Kenneth J. (Spring Lake, MI, US)

Application Number: 789022
Filing Date: 1977-04-20
Publication_date: 1978-12-19
Assignee: Questor Corporation (Toledo, OH)
Primary Class(es): 277/481
Other Classes:
US Patent Ref:

3261612	Jul, 1966	Games	277/139.
3695622	Oct, 1972	Davis et al.	277/139.

Other Refs:
Primary Examiner: Smith, Robert I.
Assistant Examiner:
Attorney: Ernsberger; Harry O.