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US 4,901,626 AGranted
Hydraulic power booster
AssigneeAlfred Teves GmbH
InventorsHeinz Zingel, Thomas Bartsch
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AssigneeAlfred Teves GmbH
InventorsHeinz Zingel, Thomas Bartsch
Estimating the term…
The invention relates to a hydraulic power booster, in particular for the actuation of a master cylinder in a hydraulic brake system for motor vehicles. The booster comprises a pressure fluid source, a control device for the control of the pressure level in a booster pressure chamber, an actuating element for the actuation of the control device which actuating element is acted upon by an input force, a converting device for the conversion of the hydraulic pressure into a translatory force which converting device is acted upon by a pressure fluid, and a force transmission element which, preferably is an operating rod for a tandem master cylinder. A semi-rigid force transmission element is arranged in the structure for the transmission of force from the actuating element to the force transmission element in order to obtain a two-stage effect.
A hydraulic power booster for the actuation of a master cylinder in a hydraulic brake system of a motor vehicle, said brake system including a pressure fluid source, comprising a control device for the control of the hydraulic pressure level in a booster pressure chamber of said power booster, an actuating element connected for the actuation of the control device, said actuating element adapted to be acted upon by an input force, a converting device connected for the conversion of the controlled hydraulic pressure into a translatory force including a converting element adapted to be acted upon by said controlled pressure fluid, and a force transmission element connected for the transmission of the translatory force to the master cylinder, wherein a semi-rigid force transmission unit is arranged between the converting device and the force transmission element, a closable fluid reservoir, means responsive to said input force for closing said fluid reservoir wherein said fluid reservoir is closed to define a pressure reservoir and provide a pressure cushion after a specific input force has been reached.
A hydraulic power booster for the actuation of a master cylinder in a hydraulic brake system of a motor vehicle, said brake system including a pressure fluid source, comprising a control device for the control of the hydraulic pressure level in a booster pressure chamber of said power booster, an actuating element connected for the acutation of the control device, said actuating element adapted to be acted upon by an input force, a converting device connected for the conversion of the controlled hydraulic pressure into a translatory force including a converting element adapted to be acted upon by said controlled pressure fluid, and a force transmission element connected for the transmission of the translatory force to the master cylinder, wherien a semi-rigid force transmission unit is arranged between the converting device and the force transmission element, and wherein a closable fluid reservoir is arranged between the converting device and the force transmission element, said fluid reservoir defining a pressure cushion adapted to be closed and define a pressure reservoir after a specific input force has been reached, the pressure fluid of said pressure reservoir transmitting the translatory force.
Dependencies are inferred from the claim text.