Power plants – Pressure fluid source and motor – Pulsator
Patent
1994-04-07
1995-05-02
Ryznic, John E.
Power plants
Pressure fluid source and motor
Pulsator
92128, 921693, B60T 13563, F01B 1102
Patent
active
054108802
DESCRIPTION:
BRIEF SUMMARY
The invention relates to an actuator unit for motor vehicle brakes, comprising includes at least one movable partition at which differential pressure can be generated, part and having at least one through hole, and flange and through the two housing parts as well as the movable partition of the booster, a head disposed in front of the front housing part, and a threaded portion projecting out of the rear housing part and adapted to be screwed into a stationary thread presented in a dividing wall of a motor vehicle.
Such an actuator unit is known from EP 0 119 880 A1. Two bolts have their shafts extending through a hole each in a flange of the master cylinder and through one each of two tubes which are disposed within the brake pressure booster in parallel with the axis thereof and which are fixed to the rear housing part and guided for axial displacement at the front housing part. By means of these bolts, the master cylinder together with the booster can be fastened from the engine compartment of a motor vehicle to the dashboard thereof at which nuts are mounted for this purpose. This means that no manipulations to fix the master cylinder and the booster need be done in the passenger compartment. Where the master cylinder and booster are held together in this manner and both attached to the dashboard, it is not possible to separate the master cylinder from the booster without first disassembling the latter from the dashboard. Another actuator unit for motor vehicle brakes with which a master cylinder and a brake pressure booster are to be fastened jointly to the dashboard of a motor vehicle by means of a pair of threaded bolts is known from DE 28 30 262 C2. The threaded bolts extend paraxially through the booster and each include front and rear threaded portions which can be passed through the dashboard and secured by a nut each from the passenger compartment. Apart from manipulations from the engine compartment to secure the booster at the dashboard of a motor vehicle, further manipulations thus are required which can be accomplished only in the passenger compartment. Two hollow bolts are fastened to the front housing part of the booster, each extending through a hole in a flange of the master cylinder. The threaded bolts pass through one each of these hollow bolts. A small nut is screwed onto the front threaded portion of each threaded bolt so as to press against the front face of the corresponding hollow bolt. A larger nut each is screwed onto the two hollow bolts to press from the front against the flange of the master cylinder. The inner diameter of the larger nuts is greater than the greatest outer diameter of the small nuts. Consequently the master cylinder can be disassembled from the booster without removing the booster from the dashboard. That is done by unscrewing the larger nuts from the hollow bolts and withdrawing them to the front while passing them over the small nuts. Subsequently, also the flange of the master cylinder can be pulled off over the small nuts without loosening the latter. The structural length in axial direction of this known arrangement for fastening the brake pressure booster and the master cylinder is quite considerable and, therefore, it is difficult to find room for it when a brake fluid reservoir and the like are attached in the usual manner to the master cylinder. It is the object of the invention to improve an actuator unit for motor vehicle brakes, composed substantially of a brake pressure booster and a master cylinder, in such a way that space saving fastening elements are sufficient to hold the master cylinder and booster together, to fasten the unit as a whole to a dividing wall, especially the dashboard of a motor vehicle, from the engine compartment of the same without any manipulations from the passenger compartment, and furthermore to permit subsequent replacement of the master cylinder without having to disassemble the booster from the dividing wall of the motor vehicle.
The object is met, in accordance with the invention, by the features of claim 1. Advanta
REFERENCES:
patent: 4291534 (1981-09-01), Jones
patent: 4594854 (1986-06-01), Takeuchi et al.
patent: 4608826 (1986-09-01), Sawyer
patent: 4632014 (1986-12-01), Endo
patent: 4827720 (1989-05-01), Flynn et al.
patent: 5072996 (1991-12-01), Heibel et al.
patent: 5079914 (1992-01-01), Schluter
Lucas Industries Public Limited Company
Ryznic John E.
LandOfFree
Actuator unit for motor vehicle brakes does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Actuator unit for motor vehicle brakes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Actuator unit for motor vehicle brakes will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1129737