Power control hand truck
CA 1069088 A · Owner: Woodward Mfg. And Sales Co. · Inventors: Rhodes, Chester E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electrically powered two wheeled hand truck having, telescoping frame parts the inner frame part being raised and, lowered by electric power means in the form of a rotatable screw shaft which engages a bearing nut fixed to the inner movable frame part. Rotation of the screw in a particular direction either lowers or raise the inner frame part. A DC motor is carried by the hand truck and powered by a battery voltage source also carried by the hand truck. Electrical switching means select the direction of rotation of the screw shaft for lowering or raising the inner movable frame part. Rapid and accurately controlled raising and lowering allows moving a load carried on the movable frame …
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted January 1, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 1, 1997.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.