Non-incendive rock-breaking explosive charge
AssigneeThe United States of America as represented by the Secretary of the Interior
InventorRichard J. Mainiero
Life of this patent
Estimating the term…
Abstract
Non-incendive explosive charge for use in flammable atmospheres includes a layer of damp salt as quenching material surrounding a charge enclosed in an inner housing. An outer housing is strong and pliable, being formed of reinforced rubbery material, to resist rough handling yet to be sufficiently pliable to conform to irregular boulder surfaces. The outer housing is pancake-shaped to provide increased contact area and stability. The relatively flat shape further permits insertion of the charge in crevices between boulders.
Claims24
A non-incendive explosives charge comprising:
- explosive means sheathed in a layer of flame quenching material surrounding said explosive means;
- and
- squat housing means formed of a rubbery material enclosing said explosive means and said flame quenching material, said housing means having a pair of substantially planar surfaces separated by a transverse peripheral surface having a height smaller than the smallest dimension of said planar surfaces.
A non-incendive explosives charge comprising:
- explosive means sheathed in a layer of flame quenching material surrounding said explosive means;
- squat housing means enclosing said explosive means and said flame quenching material, said housing means having a pair of substantially planar surfaces separated by a transverse peripheral surface having a height smaller than the smallest dimension of said planar surfaces;
- and
- detonator well means in said housing means.
Housing means for an explosive comprising:
- inner housing means enclosing said explosive;
- outer housing means surrounding said inner housing means and spaced apart therefrom to provide for storage of flame quenching means therebetween, said outer housing being formed of a pliable reinforced latex material and being short substantially flat shaped including a pair of substantially planar surfaces having substantially identical areas and separated by a peripheral transverse surface providing a height dimension to said outer housing means which is substantially smaller than the square root of the area of said planar surfaces.
Housing means for an explosive comprising:
- inner housing means enclosing said explosive;
- outer housing means surrounding said inner housing means and spaced apart therefrom to provide for storage of flame quenching means therebetween, said outer housing being formed of a pliable reinforced latex material and being short substantially flat shaped including a pair of substantially planar surfaces having substantially identical areas and separated by a peripheral transverse surface providing a height dimension to said outer housing means which is substantially smaller than the square root of the area of said planar surfaces.
A method for making a reinforced latex housing to surround an explosive charge and a detonator comprising the steps of:
- (a) forming a first section of said housing,
- said forming step including the steps of
- painting a plurality of layers of latex onto an inner surface of a mold;
- forming a detonator well internally of the housing by placing a tubing section partially in the latex when wet;
- drying the latex;
- and
- peeling the latex from the mold surface;
- (b) forming a second section of said housing;
- said second forming step including the steps of
- painting a plurality of layers of latex onto an inner surface of a mold;
- drying the latex;
- and
- peeling the latex from the mold surface;
- (c) enclosing said explosive charge within said housing;
- (d) surrounding said explosive charge with a flame quenching material;
- and
- (e) sealing said first and second sections.
Dependencies are inferred from the claim text.