Ball valve
CA 1256084 A · Owner: Fujikin International, Inc. · Inventors: Ogawa, Hiroshi; Mese, Hisayoshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A ball valve includes a valve casing (1) which comprises a valve body (7) having an internally threaded socket (9) and a pipe connecting, bushing (11, 21) having an externally threaded portion (10) screwed into the socket (9). The outer peripheral surface (12) of the forward end of the bushing has a smaller diameter than the externally threaded portion to provide a movable annular step (13, 22), while the valve body (7) is internally formed with a stationary annular step (14) opposed to and spaced apart from, the, movable step (13 22). Provided between the circular steps (13 22) and (14), is a sealing ring (17, 23) which is clamped by these steps when the bushing (11, 22) is screwed in.
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 June 20, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 20, 2006.
- 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.