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:
Nov. 27, 2001
Filed:
Apr. 28, 2000
Toshio Takayama, Yamanashi-ken, JP;
Kunihiro Matsunaga, Yamanashi-ken, JP;
Takuya Obata, Yamanashi-ken, JP;
Tokico Ltd., Kawasaki, US;
Abstract
The present invention provides a booster in which magnitude of output can be adjusted also by an operation of a solenoid mechanism. An armature (,) is shifted to the right (in FIG.,) in opposition to a returning spring by applying electricity to a solenoid (,), with the result that a space (,) on one end of the armature is communicated with a constant pressure chamber (,) through a passage (T,). When an electromagnetic force acting on the armature (,) exceeds a predetermined value, a distal end of a valve member (,) is shifted to the right (in FIG.,) via a cylindrical member (,) to open an atmospheric valve (,), thereby introducing the atmosphere into a variable pressure chamber (,). The pressure in the variable pressure chamber is applied to the other end of the armature and the difference in the pressure tends to move the armature toward its home position.