Tools – Wrench – screwdriver – or driver therefor – Machine
Patent
1989-07-27
1990-12-11
Smith, James G.
Tools
Wrench, screwdriver, or driver therefor
Machine
811778, 173 46, 7158, 7167, 279 14, 408 20, B25B 2100
Patent
active
049761730
ABSTRACT:
A manual electric tool which has a housing having a handle and a body. The housing has a socket formed in the body and electrical contacts are accessible internally of the socket. The electrical contacts are connected to a source of energy through the handle. A removable power unit is adapted to be received within the socket and retained within the housing. A second pair of electrical contacts are carried by the power unit and adapted to engage the electrical contacts in the socket when the power unit is inserted in the socket. A motor in the power unit is connected to the electrical contacts. A shaft driven by the motor protrudes beyond the power unit. The shaft receives a tool implement on the protruding portion. The power unit has opposite end portions and the shaft protrudes beyond each end. The opposite end portions of the shaft may be directly driven by the motor, may be driven through a speed reduction gearing or combinations thereof. Other embodiments may not have an electric motor in the power unit and have directly powered implements at opposite ends of the power unit. In this manner, the power unit may be inserted into the socket in a desired orientation to provide two distinct implements.
REFERENCES:
patent: 1805005 (1931-05-01), Phillips
patent: 3603782 (1971-09-01), Wortmann
patent: 3783955 (1974-01-01), Gill
patent: 4522270 (1985-06-01), Kishi
Bloom Leonard
Smith James G.
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