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:
Jan. 26, 1999
Filed:
Jun. 11, 1996
Sylvain Matte, St-Denis De Brompton, CA;
Bombardier, Inc., Montreal, CA;
Abstract
The invention relates to a variable venturi for a watercraft vehicle or similarly powered vehicle which allows the operator of the vehicle to selectively choose to operate a watercraft vehicle for achieving maximum acceleration or, alternatively, maximum top end speed. The venturi is comprised of a collar surrounding the venturi adjacent to a distal end of the venturi. At such time as the collar is activated, exposing the water flow exiting the venturi to atmospheric pressure, the diameter of the water flow exiting the venturi is reduced by approximately 1.0 mm. to 1.5 mm. in radius. This slight change in the surface area of the water flow provides a lower mass flow of the exiting water with an increased velocity of the water and top speed of the vehicle. Alternatively, a larger diameter venturi provides a higher mass flow with a decreased velocity and maximum acceleration. In a preferred embodiment, the vehicle comprises a means for allowing the rotation of the engine or the pressure of the water flow to activate an actuator means for altering the surface area of the water exiting the venturi. The preferred embodiment is comparable to automatic shifting of a transmission for a conventional land vehicle. In an alternative embodiment, the collar may be manually controlled by an operator of the vehicle to modify the surface area of the water flow exiting the venturi, thereby allowing the vehicle to achieve maximum acceleration.