Drill bit for rock drilling
CA 1094049 A · Owner: Hawera Probst G.M.B.H. Co. · Inventors: Peetz, Wolfgang; Klaissle, Siegfried
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A drill bit for rotary impact drilling of reinforced concrete comprises a shank having brazed to one end thereof a cutter ring. An ejection passage for removing drilling ? has a first section extending axially through the cutter ring and shank end and a second section opening, to the helical outlet grooves on the surface of the shank. The second section can be in the form of a slot of a radial bore through the shank. In one arrangement the second section is formed by two opposed radial bores at an acute angle to the drill axis which meet in a chisel edge within the shank. This chisel edge serves to fi?gment the standing core which remains within the cutter ring.
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 January 20, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 20, 1998.
- 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.