Abstract: An interconnecting structure between a hub and a nut of a tandem brake booster is disclosed. The nut is formed with a plurality of recesses while the hub is formed with anti-rotation locks extending radially outward for engagement with the recesses to prevent a rotation of the nut relative to the hub, and also formed with stops extending radially inward for abutment against an end of a push rod which is received within the hub to prevent such end from being withdrawn from the hub.

Abstract: A brake booster, in particular, a construction for strengthening the coupling between the brake booster and a master cylinder, is disclosed. A strengthening plate is interposed between the head of a bolt extending through an enclosed shell and the inner surface of the shell and the bolt head is ring projection welded to the strengthening plate, which is in turn projection welded to the shell while maintaining a hermetic seal therebetween at a location outside of the welding location of the bolt.

Abstract: A brake booster, in particular, a construction for strengthening the coupling between the brake booster and a master cylinder, is disclosed. The head of a bolt which extends through an enclosed shell is welded to the internal surface of the shell so as to maintain a hermetic seal, and a strengthening plate disposed around the bolt head is welded to the internal surface of the shell. Additionally, a reinforcing member fixedly connected to the strengthening plate is welded to the bolt head to improve the rigidity of the strengthening plate.

Abstract: The invention relates to a reaction transmitting mechanism for use in a brake booster in which a reaction from an output shaft is transmitted to an input shaft through a reaction disc and a valve plunger. A reaction transmitting member is interposed between the reaction disc and the valve plunger so that a reaction from the reaction disc is transmitted to the valve plunger through a plurality of paths including and not including the reaction transmitting member. When the brake is actuated, the reaction is transmitted through the reaction transmitting member. On the other hand, when the brake is released, the transmission of a reaction through the reaction transmitting member is halted. In this manner, it is possible to change the servo ratio between the actuation and the release of the brake.

Abstract: A mounted check valve assembly to be installed between two fluid vessels comprises a check valve having a cylindrical body annularly bulged midway, a pipe securely fixed at one end to one of the vessels and engaged at the other end with one end of the check valve, and a hose connected at one end to the other vessel and fitted at the other end over the check valve and farther over the end portion of the pipe to support the same.