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:
Sep. 15, 1998
Filed:
May. 01, 1996
Shawn Darrell Chriswell, Longmont, CO (US);
Darrell Ray Chriswell, Longmont, CO (US);
Other;
Abstract
A pneumatic system for comparing air flow characteristics of different unknown flow restrictions. The first head or piece of equipment and a base orifice are installed in turn on the flowbench and air flow rates are measured for each using a critical flow venturi nozzle. The base orifice flow rate is referred to as p.sub.1. The first head or piece of equipment flow rate is referred to as p.sub.2. A small orifice is identified which equates in flow rate to the first head or piece of equipment, p=p.sub.2. A flow coefficient can be calculated were R.sub.1 =p.sub.2 /p.sub.1. A second head or piece of equipment, for comparison, is then flow tested at the same location or at another location under different atmospheric conditions. The ratio of the first condition flow rates p.sub.2 /p.sub.1 multiplied by the base orifice flow rate at condition two, p.sub.3, allows calculation of a theoretical flow rate for the first small orifice (or first head or piece of equipment) at condition two, p.sub.4. Once measured, the flow rate of the second head or piece of equipment at condition two (p) may be compared to the theoretical first small orifice flow rate at condition two, (p.sub.4), to determine relative performance of both heads or pieces of equipment at condition two or as between each other either at condition one or condition two. In an alternate embodiment, the system compares the relative air flow characteristics of different race engines.