Load dependent valve for railway vehicles
CA 1313686 C · Owner: Nippon Air Brake Co. Ltd. · Inventors: Tamamori, Hideo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Case No. 8508), ABSTRACT OF THE DISCLOSURE A load dependent valve for railway cars comprising a, first spring having one end contacting a balance piston and having the other end supported by a first spring retainer which extends through center part of a control piston. A second spring having one end contacting the balance piston side and having the other end supported by a second spring retainer, a first spring adjusting mechanism disposed between the first spring retainer and the side of the main valve body for adjusting the compressive force of the first spring. A second spring adjusting mechanism disposed between the second spring retainer and side of the control piston for adjusting the …
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
- Granted February 16, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 16, 2010.
- 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.