Two way cushioning trailer hitch
CA 2233232 C · Owner: Van Vleet, Robert D. · Inventors: Van Vleet, Robert D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Trailer hitch apparatus including dampening mechanisms to simultaneously dampen vibration and shock in a longitudinal direction and vertical direction. The apparatus consists of a hollow draw bar tube capable of being removably coupled to a vehicle mounted receiving tube. The draw bar tube is adapted to move longitudinally relative to the receiving tube while a biasing means within the draw bar tube provide dampening of shock and vibration in the longitudinal movement. The apparatus further has a ball hitch assembly carried by a transverse support bar attached to an outer portion of the draw bar tube. The ball hitch assembly is biased against vertical movement thereby dampening shock and …
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 March 27, 1998 and granted May 28, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 27, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 27, 2020.
- 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.