A reservoir includes at least a container, a cap, a diaphragm, and a sealing device. The container includes a neck portion that extends from a body of the container. The neck portion includes an opening that provides access to an interior of the container. The cap is structured to interact with the neck portion. The cap includes a vent for pressure balancing of the reservoir. The diaphragm includes a slit that communicates with the vent. The sealing device includes a sealed vessel and a holder. The sealed vessel includes a sealing member sealed by a seal. The sealed vessel is movable to at least a first position such that the sealed vessel physically contacts the diaphragm to seal the slit. The sealed vessel is movable to a second position such that the sealed vessel is spaced from the diaphragm to unseal the slit. The holder is configured to bold the sealed vessel in alignment with the cap. The holder maintains a fixed position within the container when the sealed vessel moves from the first position to the second position. The holder maintains a fixed position within the container when the sealed vessel moves from the second position to the first position.

A reservoir includes at least a container, a cap, a diaphragm, and a sealing device. The container includes a neck portion that extends from a body of the container. The neck portion includes an opening that provides access to an interior of the container. The cap is structured to interact with the neck portion. The cap includes a vent for pressure balancing of the reservoir. The diaphragm includes a slit that communicates with the vent. The sealing device includes a sealed vessel and a holder. The sealed vessel includes a sealing member sealed by a seal. The sealed vessel is movable to at least a first position such that the sealed vessel physically contacts the diaphragm to seal the slit. The sealed vessel is movable to a second position such that the sealed vessel is spaced from the diaphragm to unseal the slit. The holder is configured to bold the sealed vessel in alignment with the cap. The holder maintains a fixed position within the container when the sealed vessel moves from the first position to the second position. The holder maintains a fixed position within the container when the sealed vessel moves from the second position to the first position.

The present invention relates to an oil tank ventilation device for a hydraulic brake unit of a tramcar, comprising a vent plug, a sealing ring, a gas guide hole and a gas guide pipe; the gas guide hole is a through-hole structure arranged at an upper end inside an integrated valve block; the communications of electrical element protection case, integrated valve block and the oil tank are realized by the gas guide pipe stretched into an air chamber of the oil tank and by the vent plug configured in the electrical element protection case. When the surface of the oil tank is covered with ice or snow, the rain or snow can be effectively prevent from falling on the vent plug body and the driving safety of the train is ensured.

Brake fluid reservoir valve for installation in the reservoir's outlet tube. It includes an outer sleeve fixed in the reservoir tube and equipped with an outer stop and a hollow piston housed in the sleeve. The top of the piston is closed and bordered by a groove accommodating an o-ring seal that rests upon the upper edge of the sleeve whenever the piston enters the sleeve. The piston has windows beneath the groove communicating with the interior of the piston and lugs near its lower extremity. Openings are provided in the extension of the piston beneath the lugs. A compression spring is inserted between the piston and the outer sleeve, between the stop and the lugs.

Brake fluid reservoir valve for installation in the reservoir's outlet tube. It includes an outer sleeve fixed in the reservoir tube and equipped with an outer stop and a hollow piston housed in the sleeve. The top of the piston is closed and bordered by a groove accommodating an o-ring seal that rests upon the upper edge of the sleeve whenever the piston enters the sleeve. The piston has windows beneath the groove communicating with the interior of the piston and lugs near its lower extremity. Openings are provided in the extension of the piston beneath the lugs. A compression spring is inserted between the piston and the outer sleeve, between the stop and the lugs.

A pneumatic brake system (110) for a commercial vehicle (1) has one spring brake (27), a protection valve (56), a parking brake unit (30), a network of pipelines (40), at least a first (4) and a second (5) tank with compressed air and a relay valve (19) for the parking brake unit (30). A first subnetwork of pipelines (40a) comprises pipelines configured to be pressurized at all times. A second subnetwork of pipelines (40b) comprises at least one pipeline configured to be non-pressurized when the parking brake function is applied. The first subnetwork (40a) comprises pipelines establishing fluid communication between the tanks (4, 5) and the parking brake unit (30), wherein the direction of air flow in these pipelines is by at least one thereto associated valve (50). A method for managing an air flow to an air-actuated spring brake (27) of a pneumatic brake system (110) is disclosed.

A pneumatic brake system (110) for a commercial vehicle (1) has one spring brake (27), a protection valve (56), a parking brake unit (30), a network of pipelines (40), at least a first (4) and a second (5) tank with compressed air and a relay valve (19) for the parking brake unit (30). A first subnetwork of pipelines (40a) comprises pipelines configured to be pressurized at all times. A second subnetwork of pipelines (40b) comprises at least one pipeline configured to be non-pressurized when the parking brake function is applied. The first subnetwork (40a) comprises pipelines establishing fluid communication between the tanks (4, 5) and the parking brake unit (30), wherein the direction of air flow in these pipelines is by at least one thereto associated valve (50). A method for managing an air flow to an air-actuated spring brake (27) of a pneumatic brake system (110) is disclosed.

A fluid container having at least one internal chamber for receiving a fluid, and having at least one connector for hydraulically connecting the internal chamber to a downstream hydraulic apparatus, wherein the connector at the end thereof toward the internal chamber has a mouth portion. In order to propose an improved fluid container by way of which high volumetric flows can also pass through the connector at high throughflow rates with low losses and reduced resistance, it is proposed that an escape value of the connector is provided so as to be larger than 0.82, and the mouth portion in relation to a container wall region that directly surrounds the mouth portion is at least in portions designed so as to be raised in the direction of the internal chamber.

A fluid container having at least one internal chamber for receiving a fluid, and having at least one connector for hydraulically connecting the internal chamber to a downstream hydraulic apparatus, wherein the connector at the end thereof toward the internal chamber has a mouth portion. In order to propose an improved fluid container by way of which high volumetric flows can also pass through the connector at high throughflow rates with low losses and reduced resistance, it is proposed that an escape value of the connector is provided so as to be larger than 0.82, and the mouth portion in relation to a container wall region that directly surrounds the mouth portion is at least in portions designed so as to be raised in the direction of the internal chamber.

A replaceable fluid container for an engine or a vehicle, comprising: a fluid reservoir, at least one fluid port adapted to couple with a fluid circulation system; and an actuator, configured to be operated between a first condition and a second condition, wherein the actuator is configured, in the first condition, to enable the fluid container to be inserted into and/or held in a dock, in a seated but undocked condition, and inhibit docking of the fluid container to the dock; and wherein the actuator is further configured, when operated from the first condition to the second condition with the fluid container being in the seated but undocked condition, to enable the fluid container to dock in an engaged condition with the dock, associated docks and associated methods of supplying a fluid to a vehicle or an engine and of decoupling a fluid container from a fluid circulation system of a vehicle or an engine.