Mihailo J Gavrilovic

6347837, Feb 19, 2002

Apr 9, 1999

09/288952

John D. Watson - Evergreen CO
Paul Krogh - Fremont CA
David B. Carnegie-Smith - Lesmurdie, AU
Mihailo Gavrilovic - Denver CO
Ockert R. Fourie - Lesmurdie, AU

BeckTek Limited - Pinjarra

E21C 4116

299 13, 102333

The present invention is directed to a boom supporting a slide assembly. The slide assembly includes a guide track, a drill, and a stemming member for use in small charge blasting. The drill is initially moved along the guide track to form the drill hole. After the hole is completed, the drill is retracted along the guide track, and the stemming member is moved along the guide track and placed in the drill hole. After the stemming member fractures the rock, the stemming member is retracted along the guide track and the steps repeated to break new material. The stemming member has a breech and barrel that are located in the hole. The breech is either side- or front-discharging.

6422145, Jul 23, 2002

Jul 10, 2000

09/530816

Mihailo Gavrilovic - Golden CO
Keith Wright - Dienella, AU

RockTek Ltd.

F42B 300

102200, 1022021, 1022022, 102301

The controlled electromagnetic induction detonation system for initiation of a detonatable material system includes an automated radio charge (ARCH) module connectable to an electric detonator, a transducer module for providing operational power by electromagnetic induction to the ARCH module, and a remote controller for sending instructions to the transducer module from a location remote from the detonator. Upon completion of an arming sequence, the transducer module generates an electromagnetic field which is picked up by a coil in the ARCH module and used to power the ARCH module and provide a detonation current for the detonator. The transducer module or at least a coil thereof which produces the electromagnetic field is supported on or in a stemming bar which in turn acts as a core of an electromagnet confining the magnetic flux for pick up by the ARCH module. Multilevel access control and interlock systems operate between the remote controller, transducer unit and the ARCH module to reduce the likelihood of unintentional initiation of the detonator.

6457416, Oct 1, 2002

Oct 16, 1998

09/173876

Brian P. Micke - Golden CO
Mihailo Gavrilovic - Denver CO
Keith W. Wright - Dianella, AU

RockTek Limited - Pinjarra

F42B 1000

102473

The present invention is directed to a system for fragmenting rock obstacles and obstructions in mines. The system uses a projectile having a flat or concave nose and a detonating device that has a safety pin to prevent a striker from prematurely igniting the primer during handling of the projectile. The primer is designed to initiate a detonator which detonates an explosive charge upon impact of the projectile with the target rock. The system can include transmitters and receivers and counters to provide remote operation of projectile launch, prearming, arming and/or detonation.

6679175, Jan 20, 2004

Jul 19, 2001

09/909493

Mihailo Gavrilovic - Denver CO

Rocktek Limited - Pinjarra

F42D 300

102302, 102306, 102312, 102313

The present invention is directed to a cartridge that includes a number of advantageous features. For example, the cartridge can include a bulk energetic material, an igniter located in a central portion of the cartridge body, and a low void space in the cartridge.

7047886, May 23, 2006

Nov 2, 2001

10/005797

Brian P. Micke - Golden CO, US
Mihailo Gavrilovic - Denver CO, US
Keith W. Wright - Dianella, AU

RockTek Limited - Pinjarra

F42B 10/00

102473

The present invention is directed to a system for fragmenting rock obstacles and obstructions in mines. The system uses a projectile having a flat or concave nose and a detonating device that has a safety pin to prevent a striker from prematurely igniting the primer during handling of the projectile. The primer is designed to initiate a detonator which detonates an explosive charge upon impact of the projectile with the target rock. The system can include transmitters and receivers and counters to provide remote operation of projectile launch, prearming, arming and/or detonation.

20020178955, Dec 5, 2002

May 22, 2002

10/154120

Mihailo Gavrilovic - Denver CO, US
Keith Wright - Dianella, AU

Rocktek Ltd. - Pinjarra

F42C001/00

102/200000

The controlled electromagnetic induction detonation system for initiation of a detonatable material system [()] includes an automated radio charge (ARCH) module connectable to an electric detonator [()], a transducer module [()] for providing operational power by electromagnetic induction to the ARCH module [()], and a remote controller [()] for sending instructions to the transducer module [()] from a location remote from the detonator [()]. Upon completion of an arming sequence, the transducer module [()] generates an electromagnetic field which is picked up by a coil in the ARCH module [()] and used to power the ARCH module [()] and provide a detonation current for the detonator [()]. The transducer module [()] or at least a coil thereof which produces the electromagnetic field is supported on or in a stemming bar [()] which in turn acts as a core of an electromagnet confining the magnetic flux for pick up by the ARCH module [()]. Multilevel access control and interlock systems operate between the remote controller [()], transducer unit [()] and the ARCH module [()] to reduce the likelihood of unintentional initiation of the detonator [()].

63216558, Nov 27, 2001

Apr 9, 1999

9/288735

Edward W. Tota - Mandurah, AU
Kevin Mudge - Mandurah, AU
Jeffrey W. Branson - Mandurah, AU
Peter N. Georgiou - St. Ives, AU
Mihailo Gavrilovic - Denver CO
John D. Watson - Evergreen CO

RockTek Limited

F42D 300

102302

The present invention is directed to a method for selecting flyrock control devices from among a menu of flyrock control devices to satisfy the flyrock requirements of a given job or application. The present invention is further directed to flyrock devices that can be used in the hole, at or near the opening of the hole, or at a distance from the hole to perform flyrock and/or pressure wave protection. The invention is particularly useful in suppressing flyrock in urban areas.

63324016, Dec 25, 2001

Apr 9, 1999

9/289527

Edward W. Tota - Mandurah, AU
Mihailo Gavrilovic - Denver CO
John D. Watson - Evergreen CO
Peter N. Georgiou - St. Ives, AU
Jeffrey W. Branson - Mandurah, AU

RockTek Limited

F42D 300
F42B 300

102303

The present invention is directed to a method for selecting pressure wave suppression devices from among a menu of pressure wave suppression devices to satisfy the pressure wave requirements of a given job or application. The present invention is further directed to pressure wave suppression devices that can be used in the hole, at or near the opening of the hole, or at a distance from the hole to perform pressure wave and/or flyrock protection. The invention is particularly useful in suppressing airblast and other excavation equipment noise in urban areas.