Patent Number: 6,305,752

Title: Pneumatic blasting device

Abstract: A compressed air blasting device (1), insertable in a pre-prepared bore, has a cylindrical housing or tube (2) containing a number of air guns (4). Apertures (3) in the housing (2) direct the flow of compressed air exhausted by the air guns (4) so as to produce a build-up of pressure sufficient to weaken and displace material from the area surrounding the bore. The further enhance the effect of the device (1), the bore may be filled with water and sealed with a packer (11) mounted on the device (1) prior to blasting.

Inventors: McGowan; Alan Colin (Godalming, Surrey, GU7 2LP, GB)


International Classification: E21C 37/14 (20060101); E21C 37/00 (20060101); E21C 037/14 ()

Expiration Date: 10/23/2018