Grease gun auto-pull follower apparatus
CA 2075603 A1 · Owner: Husman, David N. · Inventors: Husman, David N.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An auto-pull follower is provided for use in a grease gun of the type having a grease reservoir with a piston mounted for reciprocating movement in the reservoir. The piston is moved in a first direction through the reservoir interior to enable loading grease into the interior or to permit insertion of a grease containing cartridge or collapsible container into the interior and, the piston is moved by a piston spring in the opposite direction through the reservoir to dispense loaded grease from the reservoir interior or from the grease cartridge or collapsible container contained in the interior. The reciprocating piston is provided with a novel auto-pull mechanism comprising a spring …
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 August 7, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 7, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 7, 2014.
- 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.