Patents by Inventor Andre P. Crane

Andre P. Crane has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Detonator
    Patent number: 4939993
    Abstract: A detonator 10 includes an elongate tubular member 12 which defines a longitudinally extending passage 14. A pair of base charges 16 and 20 are located in the passage 14. A primary charge 18 which is substantially disc-shaped is located in the passage 14 and is sandwiched between the base charges 16, 20 such that, upon initiation of the primary charge 18, a shock front generated by the primary charge 18 is propagated by the base charges 16, 20 in a bidirectional manner.
    Type: Grant
    Filed: April 28, 1989
    Date of Patent: July 10, 1990
    Assignee: AECI Limited
    Inventors: Jean L. Curutchet, Michael P. du Plessis, Andre P. Crane