Decompression device for an engine

Details Decompression device for an engine Decompression device for an engine

1993-04-22

1994-11-08

Argenbright, Tony M.

Internal-combustion engines

Starting device

Compression relieving type

1231854, F02B 7708

Patent

active

053617380

ABSTRACT:
There is provided a highly reliable decompression device of engine which is constructed relatively simply without forming an opening responsible for intrusion of dusts and dirts or foreign matter into a starter cover and/or clogging of foreign matter to ensure that defective operation of individual components due to dusts and dirts hardly occurs to permit steady decompression inside a combustion chamber in cooperation with cranking operation effected by a recoil starter. The decompression device is provided in an internal combustion engine with a recoil starter having a starter cover, a recoil drum housed in the starter cover, and a rotation transmission member movable in the axial direction in cooperation with rotation of the recoil drum to transmit torque from the recoil drum to a crank shaft of the engine. The decompression device comprises a decompression passage through which a combustion chamber defined by the inner wall surface of a cylinder and the top surface of a piston communicates with the outside, a decompression valve inserted in the decompression passage, and valve operating device bearing on a bearing provided in the starter cover and rotated as the rotation transmission member moves in the axial direction to operate the decompression valve.

REFERENCES:
patent: 2742380 (1956-04-01), Peters
patent: 2947300 (1960-08-01), Trapp
patent: 3361124 (1968-01-01), Fend
patent: 3687124 (1972-08-01), Kolorz
patent: 4257367 (1981-03-01), Fujikawa et al.
patent: 5116287 (1992-05-01), Hironaka et al.
patent: 5211140 (1993-05-01), Hironaka et al.

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