Hydraulic tappet

Details Hydraulic tappet Hydraulic tappet

2008-03-11

2008-03-11

Chang, Ching (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

Tappet

C123S090390, C123S090520

Reexamination Certificate

active

07341034

ABSTRACT:
A hydraulic tappet including: a bottomed cylindrical body; a plunger slidably fitted in the body; a check valve mounted at one end of the plunger so that the check valve is interposed between a high-pressure chamber and an oil chamber, the high-pressure chamber being formed between a closed end of the body and one end of the plunger, the oil chamber being formed within the plunger; and a return spring mounted between the body and the plunger to bias the plunger in a direction to increase the volume of the high-pressure chamber. The return spring is disposed outwardly of the body. Thus, it is possible to decrease the volume of the high-pressure chamber to provide a reduction in size of the hydraulic tappet.

REFERENCES:
patent: 2237854 (1941-04-01), Voorhies
patent: 2386317 (1945-10-01), Jenny et al.
patent: 2001-73723 (2001-03-01), None

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