Diaphragm seal for a valve tappet

Details Diaphragm seal for a valve tappet Diaphragm seal for a valve tappet

1988-04-25

1989-03-28

Wolfe, Willis R.

Internal-combustion engines

Poppet valve operating mechanism

Tappet

F01L 124, F01L 114

Patent

active

048154253

ABSTRACT:
A valve tappet assembly has a hollow tappet body, a valve clearance adjusting element spaced from the inner wall face of the tappet body and having a circumferential groove, an elastomer annular diaphragm having an outer edge zone adjoining the inner wall face of the tappet body and an inner edge zone adjoining the outer face of the valve clearance adjusting element, a first radially inwardly projecting circumferential rib provided at the inner edge zone and received in the circumferential groove; an outer and an inner clamping ring circumferentially pressing the outer edge zone against the inner wall face at the tappet and, respectively, the inner edge zone against the outer wall face of the valve clearance adjusting element to provide respective circumferential sealing zones; and a second radially inwardly projecting circumferential rib in the inner edge zone, situated adjacent the first rib and being pressed into circumferential engagement with the outer wall face of the valve clearance adjusting element adjacent the circumferential groove thereof.

REFERENCES:
patent: 4397271 (1983-08-01), Gardner
patent: 4610225 (1986-09-01), Camosso et al.
patent: 4632075 (1986-12-01), Camosso et al.
patent: 4656978 (1987-04-01), Deuring
patent: 4694790 (1987-09-01), Kowal
patent: 4715334 (1987-12-01), Buente et al.
patent: 4735197 (1988-04-01), Ishida et al.

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