The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 06, 1991
Filed:
Dec. 28, 1989
Applicant:
Inventors:
David M Husband, Tehachapi, CA (US);
Francisco Q Roberto, Lancaster, CA (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01M / ; D03D / ; G01B / ; F02K / ;
U.S. Cl.
CPC ...
364508 ; 364496 ; 36457103 ; 1491088 ; 73760 ; 60253 ;
Abstract
A process for determining the aging characteristics of solid rocket propellant samples by measuring their dynamic mechanical properties is disclosed. Samples of rocket propellant are tested using a mechanical spectrometer at low strain levels and low frequencies. Since the dynamic storage modulus of a sample increases with aging time and aging temperature, it is an indicator of the acceptability of the propellant sample as a usable fuel source. The process allows a user to determine empirically the aging rate of a sample for each aging temperature with a nondestructive test procedure.