Core for casting

Claim 1

IN COMBINATION: (A) A HOLLOW CASING PARTIALLY FILLED WITH A ROCKET PROPELLANT GRAIN, SAID GRAIN HAVING A PASSAGE EXTENDING AT LEAST PARTIALLY THERETHROUGH; (B) AND A REMOVABLE CORE WITHIN SAID CASING AT THE TERMINUS OF THE SAID PASSAGE FOR FILLING AT LEAST A PORTION OF SAID CASING TEMPORARILY, SAID CORE BEING CAPABLE OF BEING REMOVED THROUGH THE SAID PASSAGEWAY TO FORM A VOID IN THE SAME CORE COMPRISING A SOLID BODY OF AN ELASTOMERIC MATERIAL, SAID ELASTOMERIC MATERIAL BEING CUT ENTIRELY THROUGH ONE DIMENSION THEREOF TO FORM A SINGLE CONTINUOUS LENGTH OF MATERIAL COILED UPON ITSELF AND HAVING TWO OPPOSITE ENDS, THE ADJACENT SEVERED PORTIONS OF MATERIAL SO FORMED BEING FREE OF MEANS SECURING SAID ADJACENT PORTIONS TOGETHER WHEREBY OPPOSITE ENDS OF SAID ELASTOMERIC MATERIAL MAY BE PULLED APART TO FORM A CONTINUOUS, ELONGATED MEMBER.

Claim 3

A METHOD FOR CASTING A SOLID PROPELLANT GRAIN IN A ROCKET ENGINE CASING COMPRISING: (A) INSERTING IN THE SAID CASING A CORE, SAID CORE COMPRISING A SOLID BODY OF AN ELASTOMERIC MATERIAL, SAID ELASTOMERIC MATERIAL BEING CUT ENTIRELY THROUGH ONE DIMENSION THEREOF TO FORM A CONTINUOUS LENGTH OF MATERIAL COILED UPON ITSELF AND HAVING TO OPPOSITE ENDS, THE ADACENT SERVED PORTIONS OF MATERIAL SO FORMED BEING FREE OF MEANS SECURING SAID ADJACENT PORTIONS TOGETHER WHEREBY WHEN OPPOSITE ENDS OF THE SAID CORE ARE PULLED IN OPPOSITE DIRECTIONS, A CONTINUOUS ELONGATED MEMBER IS FORMED; (B) INJECTING INTO THE SAID CASING AN INITIALLY FLUID ROCKET PROPELLANT MATERIAL CAPABLE OF SOLIDIFYING THEREIN SAID FLUID MATERIAL BEING EXCLUDED FROM ONE OF SAID ENDS OF SAID CORE WHEREBY TO PROVIDE ACCES TO SAID END OF SAID CORE; (C) PERMITTING THE SAID FLUID MATERIAL TO SOLIDIFY; (D) AND THEREAFTER WITHDRAWING THE SAID RESILIENT CORE MATERIAL BY GRASPING AND PULLING OUT ONE END THEREOF.

Claim 4

A METHOD FOR CASTING A SOLID PROPELLANT GRAIN IN A ROCKET ENGINE CASING COMPRISING: (A) INSERTING IN THE SAID CASING A CORE, SAID CORE COMPRISING A SOLID BODY OF AN ELASTOMERIC MATERIAL, SAID ELASTOMERIC MATERIAL BEING CUT ENTIRELY THROUGH ONE DIMENSION THEREOF TO FORM A CONTINUOUS LENGTH OF MATERIAL COILED UPON ITSELF AND HAVING TO OPPOSITE ENDS, THE ADACENT SERVED PORTIONS OF MATERIAL SO FORMED BEING FREE OF MEANS SECURING SAID ADJACENT PORTIONS TOGETHER WHEREBY WHEN OPPOSITE ENDS OF THE SAID CORE ARE PULLED IN OPPOSITE DIRECTIONS, A CONTINUOUS ELONGATED MEMBER IS FORMED; (B) INJECTING INTO THE SAID CASING AN INITIALLY FLUID ROCKET PROPELLANT MATERIAL CAPABLE OF SOLIDIFYING THEREIN SAID FLUID MATERIAL BEING EXCLUDED FROM ONE OF SAID ENDS OF SAID CORE WHEREBY TO PROVIDE ACCES TO SAID END OF SAID CORE; (C) PERMITTING THE SAID FLUID MATERIAL TO SOLIDIFY; (D) AND THEREAFTER WITHDRAWING THE SAID RESILIENT CORE MATERIAL BY GRASPING AND PULLING OUT ONE END THEREOF.