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:
Apr. 09, 2002
Filed:
Dec. 18, 2000
Jason L. Williams, Erie, PA (US);
Darco Industries LLC, Granada Hills, CA (US);
Abstract
A toe cap is a reinforcement member made of thermoset structural composite material with a tensile strength of 30,000 psi, a tensile modulus of 2.5×10 psi, a compression strength of 35,800 psi, a specific gravity of 1.85, and a Barcol hardness of 65. More preferably, the material has a tensile strength of at least 50,000 psi, a tensile modulus of at least 3.8×10 psi, a compression strength of at least 42,000 psi, a specific gravity of at least 1.90, and a Barcol hardness of at least 70. A suitable family of materials is a thermoset vinyl ester based sheet molding compound reinforced with glass fiber and/or carbon fiber. The sheet molding compound has fiber content of about 63% and a typical fiber length of one inch. The maximum wall thickness of the upper portion of the toe cap is in the range of between 0.100 inch and 0.250 inch.