Acoustic pulse generator
CA 1185004 A · Owner: Atlantic Richfield Company · Inventors: Barta, Henry R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Apparatus for generating an acoustic pulse in a medium wherein an impact piston is driven downwardly along a cylindrical housing by compressed gas to strike a rigid target positioned in contact with the earth. In its firing position the tapered, upper portion of the piston extends above the top of the housing within a container occupied by the compressed gas the top of, the piston being at the same time recessed within a gastight mating enclosure at the top of the container. In this position the tapered piston surface is constantly exposed to circumferential gas pressure so as to provide a positive breakaway force. Upon release of suitable piston latch means the piston, is first urged …
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 April 2, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 2, 2002.
- 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.