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:
Jan. 18, 2000
Filed:
Oct. 29, 1998
Applicant:
Inventor:
Derek A Tidman, McLean, VA (US);
Assignee:
Advanced Launch Corporation, McLean, VA (US);
Primary Examiner:
Int. Cl.
CPC ...
F41B / ;
U.S. Cl.
CPC ...
124-6 ; 124-1 ; 74 86 ;
Abstract
The velocity of a mass is monotonically increased from an initial non-zero value at the time it enters a spiral track. A drive gyrates the track about an axis so the mass makes each turn around the track in about the same period of time. The drive includes plural rotary drive shafts eccentrically and fixedly connected to the track at several points. The drive shafts and track are arranged so points on a first side of a particular spiral turn where the mass is located are driven toward the axis and points on a second side of the particular spiral turn remote from where the mass is located are driven away from the axis.