Long stroke well pumping unit with carriage
CA 1333546 C · Owner: Rota-Flex Corporation · Inventors: Lively, Gordon R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A long stroke well pumping unit including a drive motor, a pulley and band assembly, a carriage assembly a, counterweight assembly and a belt and pulley assembly. The pulley and band assembly includes first and second pulleys and a continuous band which extends between and engages the pulleys. One of the pulleys is driven by the drive motor. The pulleys are spaced vertically. The carriage assembly includes a block base, wheels rotatably attached to the block base and an outer frame. The block base is swivelly connected to the continuous band. The wheels rotatably engage the interior of the frame. The counterweight assembly is fixedly attached to the frame. The belt and pulley assembly has …
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 December 20, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 20, 2011.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
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.