Christopher R Hansen

US Patent:

7028682, Apr 18, 2006

Filed:

Oct 14, 2004

Appl. No.:

10/955060

Inventors:

Christopher L. Hansen - Chatsworth CA, US

International Classification:

A63B 69/40
F41B 7/00

US Classification:

124 16, 124 37

Abstract:

A ground-based ball launcher for inflated-ball sports practice provides an impulse that propels the ball upwardly in a trajectory of pre-adjustable angle and velocity so as to obtain a desired maximum height and landing distance offset from the launcher. An optional adjustable time delay gives a player time to move into place and get set for each launching. Launching energy may be provided by a compressed coil spring which can be reloaded by the user with foot-pump action.

US Patent:

7731594, Jun 8, 2010

Filed:

Aug 22, 2007

Appl. No.:

11/894292

Inventors:

Christopher L. Hansen - Chatsworth CA, US

International Classification:

A63C 19/02
A63C 19/12

US Classification:

472 93, 472 94

Abstract:

A platform for performance of personal combat martial arts is made with a concave upper surface having a central generally flat region for main performance surrounded by a border region that slopes upwardly to the platform periphery, so that instead of the traditional impasse and fight interruption experienced when a combatant is forced into the border region, ropes or corners of conventional flat fight rings, the action tends to continue and automatically gravitate back into the main central region without interruption. A full-height constraint net that slopes upwardly and inwardly further urges combatants away from the periphery and safely prevents bodily ejection, thus protecting ringside spectators while providing all spectators with a good view of the sports action.