Powered Toothbrushes (Patent No: 694570)

Inventor: Dresen, Esbern H.

Location: Edmonton

Comments: N/A

Description:


The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:

1. In a powered reversible toothbrush, a housing, a socket mounted rotatably at one end of the housing, a first motor rotatable in one direction and mounted in the housing, a hollow drive shaft having a slidable driven connection with the first motor, a second motor rotatable in the opposite direction to the first motor and mounted in the housing, a solid drive shaft mounted slidably in the hollow drive shaft coaxially therewith and having a slidable driven connection with the second motor, means to reciprocate the hollow drive shaft and the solid drive shaft to alternately engage and disengage the hollow drive shaft and the solid drive shaft with the socket in the housing, a power source, and means to connect the power source to the first or second drive motor coincidentally with the engagement of the hollow or solid shaft with the socket.

2. The device as claimed in Claim 1 wherein the means ,to reciprocate the drive shafts comprises an actuating handle pivoted to the housing to project at one end outside the housing and at its opposite end inside the housing, a running connection inside the housing between the actuating handle and the hollow and solid drive shafts whereby movement of the handle in one direction will move the hollow shaft forwardly and the solid shaft rearwardly and movement of the handle in the opposite direction will move the solid shaft forwardly and the hollow shaft rearwardly.


3. The device as claimed in Claims 1 and 2, and a switch contact connected operatively to the actuating handle and the power source and motors whereby movement of the actuating handle alternately will connect the power source to the first or second motor.

Bishop, McKenzie & Co.
Barristers & Solicitors
303 Alexandra Building Edmonton, Alberta
Patent Agents of the Applicant