Override arrangement and actuating knob for a shifting mechanism

Details Override arrangement and actuating knob for a shifting mechanism Override arrangement and actuating knob for a shifting mechanism

1977-06-15

1979-06-26

Braun, Leslie

Machine element or mechanism

Control lever and linkage systems

Elements

81 524A, 144 32R, 173 48, 192 67R, 192 99S, G05G 104, E02D 702

Patent

active

041589700

ABSTRACT:
The invention is directed to an override arrangement and handle for a shifting mechanism in portable tools. The portable tool includes a housing and a drive motor mounted in the housing. A case extends from the housing and a transmission is operatively connected to the motor and mounted in the case. A shifting mechanism engages the transmission for adjusting the same between at least two modes of operation. The shifting mechanism includes a shaft penetrating the case and rotatable between two positions corresponding to respective ones of the modes of operation. The improvement includes a handle attached to the shaft that is contoured so as to abut against the case when the handle is rotated past one of the two positions thereby preventing the operator of the tool from overriding the one position.

REFERENCES:
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patent: 3178956 (1965-04-01), Stanley
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patent: 3845826 (1974-11-01), Beisch
patent: 3866692 (1975-02-01), Stelljes
patent: 3867988 (1975-02-01), Koehler
patent: 3937036 (1976-02-01), Sauerwein
patent: 4006136 (1978-01-01), Wanner et al.

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