Margaret L Lu

US Patent:

20160067625, Mar 10, 2016

Filed:

Nov 10, 2015

Appl. No.:

14/937595

Inventors:

Margaret LU - Edmond OK, US

International Classification:

A63H 33/00
B29C 39/02

Abstract:

Disclosed are methods of making polymeric swords and sparring instruments having improved mechanical properties. In one embodiment, a method of making a polyurethane sword includes centering a flexible support member on either a first half of a sword mold or on a second half of the sword mold; spraying a base coat paint on either the first half of the sword mold or on the second half of the sword mold; pouring a machine perfused polyurethane mixture into the first half the sword mold and into the second half of the sword mold and closing the sword mold by clasping the first half of the sword mold to the second half of the sword mold; heating the sword mold comprising the machine perfused polyurethane mixture in a heating apparatus; and removing the polyurethane sword from the sword mold.

US Patent:

20150147937, May 28, 2015

Filed:

Nov 22, 2013

Appl. No.:

14/088327

Inventors:

- Ontario, CA
Margaret Lu - Edmond OK, US

International Classification:

A63H 33/00
B29C 70/68

US Classification:

446473, 264161, 264259

Abstract:

Disclosed are polymeric swords and sparring instruments having improved mechanical properties and methods of making such swords and sparring instruments. In one embodiment, a polyurethane sword comprises a handle portion and a blade portion. In this embodiment, the polyurethane sword also comprises a flexible support member having a handle support portion and a blade support portion. In this embodiment, the polyurethane sword also comprises a polyurethane outer layer configured to encase the flexible support member from the handle support portion to the blade support portion. The handle portion comprises the handle support portion and the polyurethane outer layer encasing the handle support portion. Moreover, the blade portion comprises the blade support portion and the polyurethane outer layer encasing the blade support portion. In addition, the polyurethane outer layer may be composed of a machine perfused polyurethane mixture.