Portable handheld power-driven tool

Details Portable handheld power-driven tool Portable handheld power-driven tool

1987-10-09

1989-05-09

Yost, Frank T.

Tool driving or impacting

Means to drive tool about an axis

Means to hold and relatively rotate sections of tool shaft

81 5711, B23B 4500

Patent

active

048280496

ABSTRACT:
An electric handtool includes a two-stage speed reduction gear unit in which each stage includes a sun gear and two planet gears carried by a carrier. The carrier of the first stage has a small diameter hexagonal first socket for receiving and entraining, for example, the shank of a chuck. The carrier of the second stage has a large diameter hexagonal second socket for receiving and entraining, for example, the shank of a screwdriver bit as well as a passage bore to provide access to the first socket. The socket and bore in the second stage are dimensioned so that the shank of the chuck can extend therethrough without being entrained thereby.

REFERENCES:
patent: 3195704 (1965-07-01), Linsker

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