Valves and valve actuation – Biased valve – Springs and spring retainers
Patent
1991-08-29
1992-09-01
Schwadron, Martin P.
Valves and valve actuation
Biased valve
Springs and spring retainers
123 9067, F01L 310
Patent
active
051433516
ABSTRACT:
A self-locking valve spring retainer (30) operatively retaining a return spring (28) on the stem (20) of a poppet valve (16) comprises an annular base ring (48) from which three flexible arms (52) upwardly extend. A pair of axially spaced locking steps (66, 68) project radially inwardly from each of the arms (52) to provide barbed engaging ledges (74, 76) which interlock with a correspondingly shaped valve stem (20). An annular waisted hinge (86) is formed between the three arms (52) and the base ring (48) to ease stresses on the retainer (30) as the arms (52) are blossomed outwardly during installation and removal. A metallic anti-wear plate (88) is secured to the top of each arm (52). An installation and removal tool (92) for the retainer (30) comprises three wedge-shaped prongs (98) insertable within the three expansion slots (54) separating the three arms (52) for blossoming the retainer (30) prior to insertion and removal. A member (102) extends integrally from each of the prongs (98) for engaging the return spring (28) to maintain the return spring (28) spaced from the retainer (30) prior to blossoming the retainer (30).
REFERENCES:
patent: 3273856 (1966-09-01), Tauschek
patent: 3416771 (1968-12-01), Updike
patent: 3466009 (1969-09-01), Giles
patent: 3612016 (1971-10-01), Jeken
patent: 4515346 (1985-05-01), Gaterman, III
patent: 4879978 (1989-11-01), Pierce
Lee Kevin L.
Schwadron Martin P.
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