Oil filter crusher
CA 2254965 A1 · Owner: Traub, Zeno P. · Inventors: Gross, John G.; Traub, Zeno P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An oil filter crusher includes an elongated triangular frame a threaded drive , screw (10), and a ram assembly but does not include any actuator for driving the screw. Rather, a first end of the drive screw has a drive head (12) to which a user may couple a conventional wrench such as a pneumatic impact , wrench of the type commonly used in automotive service centers. A thrust bearing assembly (40) couples the second end of the drive screw to the ram assembly (32). A threaded portion of the drive screw (10) engages a threaded opening in a portion of the frame. The ram assembly (32) thus moves in an axial direction in response to rotation of the drive screw with respect to the 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
- Filed May 30, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 30, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 30, 2019.
- 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.