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:
Jul. 09, 1991
Filed:
Nov. 29, 1989
Paul A Crafton, Norman, OK (US);
Other;
Abstract
A system for very high speed ground transportation employing vehicles running in tunnels. The interior surface of the tunnels is a helical thread, and the wheels of the vehicle are helical gears meshing with the helical interior surface of the tunnel so as to provide positive traction. The vehicles have top traction wheels as well as bottom traction wheels in order to provide dynamic stability at very high vehicular speeds. Each vehicle carries an inner compartment coupled to the vehicle so that the compartment may be continually positioned relative to the vehicle in order to provide passenger comfort and/or cargo safety as the vehicle moves down the tunnel when the longitudinal axis of the tunnel has curvature.