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. 16, 1991
Filed:
Oct. 02, 1989
Yoshihisa Koizumi, Fujisawa, JP;
Isuzu Motors Limited, Tokyo, JP;
Abstract
A brake system comprises an impeller selectively connected to a propeller shaft of a vehicle for consuming energy of the engine and applying a brake force to the propeller shaft, an impeller housing for rotatably housing the impeller and defining an air passage for introducing/discharging external air to/from the impeller, a throttle valve disposed in the air passage upstream of the impeller for adjusting the air flow rate in the air passage, and a negative pressure actuator for moving the throttle valve in accordance with the air flow rate in the air passage. The throttle valve is moved by the negative pressure actuator in accordance with the air flow rate in the air passage. In other words, the brake system adjusts the brake force mechanically by itself in a manner such that an excessive brake force is never applied to the propeller shaft. The brake system does not require a cooling device and only requires a simple arrangement for controlling the brake force.