Abstract:
The invention relates to a method for producing a membrane reservoir with a metal case. The inventive method comprises the following steps; a) rotating a tubular piece around its longitudinal axis, b) preheating one end of the tubular piece for deformation through heat retraction by strain-hardening, c) strain-hardening the end of the tubular piece by applying at least one pressure tool, selectively heating the target area of said pressure tool to deformation temperature in order to form a floor at the end of the tubular piece with an opening at a collar, said collar being turned outwards, d) forming an inner circular groove in the central area of the tubular piece, e) introducing a membrane system, said membrane system being sustained in the circular groove by a corresponding clamping ring, and f) forming a second floor at the second end of the tubular piece according to steps b) and c).
Abstract:
In an accumulator (A) in which a peripheral edge of a bladder (2) dividing the interior of a shell into a gas chamber (3) and a liquid chamber (4) is attached to the shell, the radius of curvature of an inner wall (1b) of the shell defining the gas chamber (3) is larger than that of an inner wall (1a) of the shell defining the liquid chamber (4). The bladder may be provided with a laminated gas-impervious member 14, which may itself be laminated from a first membrane (12) of polyvinyl alcohol containing glycerine and a second membrane (13) of ethylene-vinyl alcohol co-polymer. The first membrane (12) may be laminated from a plurality of thin films.
Abstract:
Procédé de fabrication d'accumulateur hydraulique constitué par deux coquilles (1 et 2) assemblées l'une à l'autre avec interposition d'une membrane souple (5), caractérisé par le fait que l'élément mécanique (8,17) assurant la liaison des deux coquilles est soumis, avant assemblage desdites coquilles, à une précontrainte préalable engendrant un effort de rapprochement des deux coquilles l'une contre l'autre qui est supérieur à l'effort maximum de séparation des deux coquilles auquel est soumis l'accumulateur lorsqu'il est soumis à la pression d'épreuve.
Abstract:
The invention relates to an electronically controllable brake system for a motor vehicle with a cylinder/piston arrangement provided with brake fluid. Operation of a brake pedal causes said arrangement to supply brake fluid acting on a vehicle brake. The cylinder/piston arrangement can be connected to a pump arrangement and a pressure accumulator which has a housing (10) having a fluid connection (12) for fluid flowing in or out of the housing, and a spring arrangement (30a, 30b). Brake fluid flowing in through the fluid connection (12) acts against the force of said spring arrangement, at least one part (30a) of the spring arrangement being formed by at least one part of the housing wall.
Abstract:
Disclosed is an accumulator comprising: a pressure vessel (1); an elastic bellows (5) in which a compressed gas is sealed, an end of the bellows being fixed to an interior of the pressure vessel; a flow path (8) having an opening (8a) communicating with the interior and an exterior of the pressure vessel (1); a valve (7) connected to a movable end of the bellows (5) to operatively close the opening (8a) according to elastic motion of the bellows (5); and a hydraulic chamber (4) partitioned from a gas chamber (3) formed in an interior of the bellows (5) containing the compressed gas. The valve (7) comprises an upper surface (7a) which can cover the opening (8a), and plural circular protrusions (7b,7c) which surround the entire circumference of the opening (8a) and can closely contact the circumference of the opening (8a).
Abstract:
The invention relates to an electronically controllable brake system for a motor vehicle with a cylinder/piston arrangement provided with brake fluid. Operation of a brake pedal causes said arrangement to supply brake fluid acting on a vehicle brake. The cylinder/piston arrangement can be connected to a pump arrangement and a pressure accumulator which has a housing (10) having a fluid connection (12) for fluid flowing in or out of the housing, and a spring arrangement (30a, 30b). Brake fluid flowing in through the fluid connection (12) acts against the force of said spring arrangement, at least one part (30a) of the spring arrangement being formed by at least one part of the housing wall.
Abstract:
PURPOSE: A brake system is provided to be controlled electronically and be good for a vehicle having a cylinder/piston device that is provided a brake fluid. CONSTITUTION: The cylinder/piston device is connected to a pump device and the compressor and the compressor has a housing(10) that contains a fluid connecting unit(12) good for flowing fluid to the outside and to the inside of the housing as well as spring devices(30a,30b) applying power brake fluid through the fluid connecting unit, so that a brake pedal can be worked and brake fluid can be provided. The component of the spring devices are formed by a component(30a) on the housing wall.
Abstract:
A hydroaccumulator, especially a membrane accumulator, has an accumulator housing with two housing parts and a separating element in the housing. The separating element can be a separating membrane dividing the accumulator housing into a gas chamber and a fluid chamber. The gas chamber is connected to carry gas to and from gas refiller through a connection. The gas refiller is formed from an additional housing part connected to the accumulator housing to form a unit. The connection is at least one connecting opening in the accumulator housing connecting the interior of the additional housing part to the gas chamber. Additional gas accumulator volume is provided without otherwise conventional pipework to save money and installation space and avoid conventional leaks which occur in the area of the pipework.
Abstract:
The present invention relates to a method of filling a pressure medium accumulator with a housing having an inner space that is subdivided into two chambers by a metallic pleated bellows used as a media-separating element, the first chamber thereof being filled with a gas and the second chamber being filled with a liquid pressure medium, and wherein a bottom valve is provided in a hydraulic port, its closing member being operable by the media-separating element, said valve permitting filling of the second chamber with fluid and preventing a complete evacuation of the second chamber. To enable reliable filling of the above-mentioned chambers with corresponding media without damaging the pleated bellows, the invention proposes a combination of the following process steps: a) evacuation of the second chamber b) filling of the second chamber with pressure medium, and c) filling the gas into the first chamber.