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. 23, 2002
Filed:
Mar. 01, 2000
Majid Rashidi, Pepper Pike, OH (US);
Cleveland State University, Cleveland, OH (US);
Abstract
The present invention relates to polyurethane foam spray guns and disposable, attachable nozzles. The spray gun has at least two barrels and metering chambers containing continuous passageways defined by inner bores. Each inner bore can have at least one ramp-shaped slot for controlled metering of a resin. Within each barrel and metering chamber is a plunger. At the front end of the plunger but not the tip is an O-ring that aids in the control of the metering of each resin. At the mid-section of the plunger is at least one O-ring that aids in the prevention of leakage within the spray gun. Both the plunger tip and the discharge opening of each barrel/metering chamber are narrowed/conical. The nozzle contains a one-way valve to prevent the crossover of the resins. The nozzle's tip has different shapes depending on the structure of the foam product desired.