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:
Nov. 25, 1997
Filed:
Oct. 31, 1996
Applicant:
Inventors:
Peter Thiel, Bloomington, IN (US);
Don D Hughes, Columbus, IN (US);
John F Grote, Columbus, IN (US);
Assignee:
Caltherm, Columbus, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01P / ;
U.S. Cl.
CPC ...
236 345 ; 13763015 ; 236100 ;
Abstract
A thermostat having a main valve and a secondary valve is disclosed both of which are biased closed by a single coiled compression spring and opened by a single piston. The entrance to the channel of the secondary valve is maintained at a maximum dimension of approximately 0.015 inches in order to keep undesirable particulate matter out of the valve. The surfaces within the valve channel encourage laminar flow which increases the volume of flow which can be passed through the valve while keeping the total surface area of the valve small.