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:
Dec. 14, 2010
Filed:
Jan. 24, 2007
Ronald L. Uhlenberg, Marshalltown, IA (US);
Stephen G. Seberger, Marshalltown, IA (US);
Riyaz M. Ali, Austin, TX (US);
Jimmie L. Snowbarger, Marshalltown, IA (US);
Clyde T. Eisenbeis, Marshalltown, IA (US);
Ronald L. Uhlenberg, Marshalltown, IA (US);
Stephen G. Seberger, Marshalltown, IA (US);
Riyaz M. Ali, Austin, TX (US);
Jimmie L. Snowbarger, Marshalltown, IA (US);
Clyde T. Eisenbeis, Marshalltown, IA (US);
Fisher Controls International LLC, St. Louis, MO (US);
Abstract
A device intended to meet flameproof approval requirements is configured to have two compartments separated by an energy-limiting barrier. The first compartment of the device houses the wiring terminations that bear ignition-capable energy and, therefore, must be flameproof. The energy-limiting barrier is configured to limit the energy that can reach the second compartment to a level that is not ignition capable. This allows the second compartment to be safe without meeting the flameproof requirements, and allows user-interface elements such as switches and indicators to be designed in a more cost-effective manner.