The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 27, 2022
Filed:
May. 23, 2018
Applicant:
Detnet South Africa (Pty) Ltd., Johannesburg, ZA;
Inventor:
Phillip Olwage, Sandton, ZA;
Assignee:
DETNET SOUTH AFRICA (PTY) LTD, Johannesburg, ZA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01B 7/04 (2006.01); F42D 1/045 (2006.01); F42D 3/00 (2006.01); H01B 7/08 (2006.01); H01B 7/18 (2006.01);
U.S. Cl.
CPC ...
H01B 7/04 (2013.01); F42D 1/045 (2013.01); F42D 3/00 (2013.01); H01B 7/0869 (2013.01); H01B 7/1825 (2013.01);
Abstract
A downline wire () serves to connect a location on the ground surface to at least one detonator () in a blast hole. The downline wire includes at least two flexible electrical conductors () encased by respective flexible layers of an insulating material () and a flexible sheath () in which the insulated conductors are embedded. Each conductor () is made of a copper-clad steel core and the insulating material is either a filled flexible polyvinylchloride (PVC) composition or a polyester elastomer. The sheath () is made from a medium or high density polyethylene compound which includes carbon black.