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. 12, 1993
Filed:
Aug. 21, 1991
Takayoshi Shinohara, Nagano, JP;
Chiseki Kaneko, Nagano, JP;
Nissin Kogyo Kabushiki Kaisha, Ueda, JP;
Abstract
In a tandem type booster, the inner peripheral end of a front booster piston and the inner peripheral bead of a front diaphragm are clamped between a front end of a sleeve fitted over an outer periphery of the piston boss and a flange provided on the piston boss, so that they are connected to a front portion of the piston boss, and a rear booster piston and the piston boss are coupled to each other in a bayonet manner by retaining pawls formed on a inner peripheral end of a rear booster piston and retaining grooves provided in the outer periphery of the piston boss. The rear booster piston, the sleeve and the piston boss are engaged with one another while preventing relative rotation therebetween, and an inner peripheral bead of a rear diaphragm is clamped between the rear booster piston and a set ring and connected to a rear portion of the piston boss. Therefore, even if the set ring should be removed, the rear booster piston and the piston boss coupled to each other in the bayonet manner cannot be immediately separated, thereby ensuring that the coupling of the front and rear booster pistons with the sleeve is maintained.