May 27, 2025

US12313390 - Deployment of a detonator assembly

A detonator assembly which includes a holder, a flexible elongate element which is engaged with the holder, a detonator connected to the element, an energy storage device on the holder and a coil arrangement for charging the energy storage device when the coil arrangement is coupled to a variable electromagnetic field.

Assignee: DETNET SOUTH AFRICA (PTY) LTD
Inventors: Michiel Jacobus Kruger
Filing date: 2022-09-08

The patent describes a detonator assembly that includes a holder with a spool, a flexible elongate element, and an energy storage device that charges through a secondary inductive coil when moved through a magnetic field. This design allows the assembly to accumulate sufficient energy to activate the detonator, enabling its operation when initially insufficient energy is present.

Claim 1

A detonator assembly ( 10 ) which includes a detonator ( 28 ), a holder ( 14 ) which comprises a spool ( 14 ), a flexible elongate element ( 40 ) which is coiled on the spool ( 14 ), an energy storage device ( 26 ) on the spool ( 14 ), a communication device ( 30 B) which is mounted to the spool, a secondary inductive coil ( 32 ) which is mounted to the spool wherein the spool is movable relative to a magnetic field thereby to induce current into the coil which current is used to charge the energy storage device wherein initially the energy in the energy storage device is inadequate for firing the detonator and wherein movement of the coil through the magnetic field transfers adequate energy into the energy storage device to enable the detonator assembly to become operative and to fire the detonator.

Google Patents

https://patents.google.com/patent/US12313390

USPTO PDF

https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12313390