Hand-held power tool with a combustion motor

Details Hand-held power tool with a combustion motor Hand-held power tool with a combustion motor

1981-02-02

1982-09-21

Cuchlinski, Jr., William A.

Internal-combustion engines

Combined devices

173163, 403338, 403374, F02B 6302

Patent

active

043501230

ABSTRACT:
A hand-held power tool comprises a drive unit including a first housing, a combustion motor located in and fixed to said first housing and having an output shaft; and a work unit including a rotatable tool, an input shaft, a transmission between the input shaft and the tool for driving the latter and a second housing. A quick-connection arrangement is provided for releasably connecting the first to the second housing and a coupling arrangement coaxial with the connection arrangement serves to couple the output shaft with the input shaft. The quick-connecting arrangement comprises a centralizing ring coaxial with the output shaft and fixed to a stationary part of the combustion motor, a coupling ring turnably mounted on the centralizing ring, an annular coupling member fixed to the second housing, the coupling ring and the coupling member having cooperating cams having inclined faces, a spring connected to the coupling ring for turning the latter in a direction in which these inclined faces are tightly engaged to couple the coupling ring with the coupling member and therewith the first housing to the second housing, and a lever projecting radially from the coupling ring and being movable from an arresting position holding the coupling ring in a stationary position to a releasing position permitting turning of the coupling ring under the action of the spring.

REFERENCES:
patent: 3616867 (1971-11-01), Celli
patent: 3703113 (1972-11-01), Feisel
patent: 4173951 (1979-11-01), Ishihara
patent: 4280373 (1981-07-01), Denkowski et al.
patent: 4286675 (1981-09-01), Tuggle

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