Hydraulic brake booster

Patent · Tue Feb 16 00:00:00 EST 1988

OSTI ID:5136710

Fulmer, K H

This patent describes a hydraulic brake booster, a connection with an accumulator for storing fluid pressure used selectively during braking to provide a power assist, a booster housing forming a bore communicating with the accumulator, a pair of pistons movable within the bore to communicate fluid from the bore to respective brake circuits during braking, and a sleeve assembly disposed within the bore and cooperating with one of the pistons to form a power chamber. The sleeve assembly carries a pair of valve members one of which normally closes communication between the power chamber and the accumulator and the other normally venting the power chamber to a reservoir. An input member cooperates with the pair of valve members to move the valve members during braking such that the one valve member communicates the accumulator with the power chamber and the other valve member closes communication between the power chamber and the reservoir. The input member cooperates with the pair of valve members by means of a resilient member, characterized in that the sleeve assembly includes a reduced diameter portion forming a sleeve chamber between the reduced diameter portion and the bore, and an axially movable sleeve member disposed about the sleeve assembly.

• Assignee: Allied Corp., Morristown, NJ
• Patent Number(s): US 4724674
• OSTI ID: 5136710
• Resource Relation: Patent File Date: Filed date 30 Oct 1985
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
BRAKES
DESIGN
HYDRAULIC ACCUMULATORS
HYDRAULIC FLUIDS
HYDRAULICS
OPERATION
PISTONS
STORAGE
VALVES
ACCUMULATORS
CONTAINERS
CONTROL EQUIPMENT
EQUIPMENT
FLOW REGULATORS
FLUID MECHANICS
FLUIDS
MACHINE PARTS
MECHANICAL ENERGY STORAGE EQUIPMENT
MECHANICS
TANKS
WORKING FLUIDS
330602* - Vehicle Design Factors- Engine-Transmission Matching