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:
Feb. 05, 2002
Filed:
Oct. 12, 2000
Applicant:
Inventors:
Chad W. Martin, Stillwater, OK (US);
Bret A. Martin, Stillwater, OK (US);
Assignee:
Brunswick Corporation, Lake Forest, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B63H 2/110 ;
U.S. Cl.
CPC ...
B63H 2/110 ;
Abstract
A marine propulsion system is provided with an electric motor that drives a water pump. This arrangement allows an engine control unit to selectively change the speed of the electric motor and the water pump to suit operating conditions of the engine. Rather than driving the water pump directly from an output shaft of the internal combustion engine, it is driven by the electric motor which responds to signals provided by the engine control unit. These signals are preferably pulsed width modulated signals in which the duty cycle is changed to affect a change in the operating speed of the motor.