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:
Mar. 13, 1990
Filed:
May. 18, 1988
Michael C Manion, Hopkins, MN (US);
Vernon C Ralph, Hopkins, MN (US);
Honeywell Inc., Minneapolis, MN (US);
Abstract
An obturating band of the despun variety is manufactured within the channel of a projectile assembly. A split ring polymer pre-band is clamped around the band seat of the projectile assembly and the free ends are welded together to form a continuous ring around the diameter of the projectile assembly within the encircling channel. One free end includes a male connector and the other free end includes an undersized female receptacle. Upon exposure to ultrasonic energy, the free ends are welded together at a scarf joint. A calculated amount of extra material which is present in the male connector is allows the joint to weld itself. The joining surfaces are positioned on indented sections of the free ends such that the resulting obturating band does not bulge at the joint. The obturating band is constructed to slip against the band seat and, therefore, is allowed to rotate at a rate independent of the underlying projectile.