Electronically controlled valve for a materials handling vehicle
CA 2580680 C · Owner: Dammeyer, Karl L. · Inventors: Dammeyer, Karl L.; Jones, William C. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A materials handling vehicle (10) is provided comprising: a base (20); a carriage assembly (30, 60) movable relative to the base; at least one cylinder (50, 70) coupled to the base to effect movement of the carriage assembly relative to the base; and a hydraulic system (80) to supply a pressurized fluid to the cylinder. The hydraulic system includes an electronically controlled valve (300, 600) coupled to the cylinder. The vehicle further comprises control structure to control the operation of the valve (300 600) , such that the valve is closed in the event of an unintended descent of a carriage assembly in excess of a commanded speed.
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
- Filed September 22, 2005 and granted October 29, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 22, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.