Seal for a reciprocating rod
CA 2087303 A1 · Owner: Schumacher, Herbert · Inventors: Trauth, Werner; Ehmsen, Roland; Schumacher, Herbert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Seal for a reciprocating rod includes a seal ring made of elastic rubber material, which at an end remote from the space to be sealed has a recess that is open towards the rod and the end and a guide ring loosely, inserted into the recess. The guide ring is provided with a circumferential, radially outwardly directed annular ridge spaced from the end, which is engaged by a protrusion of relatively smaller diameter on the seal ring. The guide ring is thereby held in the seal ring so that it cannot be lost during shipping and installation of the seal and both rings can be installed as a unit which provides for simplified storage, shipping and installation of the seal.
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 January 14, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 14, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 14, 2015.
- 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.