Hydraulic system

A hydraulic system for motor vehicles, said hydraulic system comprising:

• a master cylinder, a slave cylinder, a fluid conduit connecting said cylinders for carrying a pressure-transmitting fluid, and at least one pressure relief valve positioned in the conduit between the cylinders and having a valve inlet and a valve outlet, wherein the relief valve is operable in response to fluid pressure and includes at least one port between the valve inlet and the valve outlet to provide fluid communication between the valve inlet and the valve outlet, wherein an elastic body overlies the at least one port to block flow therethrough and to allow flow through the port when the pressure of the fluid on one side of the valve exceeds a predetermined pressure value, to cause the elastic body to move away from the port and allow flow therethrough, and wherein the valve inlet and the valve outlet are substantially coaxial and the at least one port extends transversely relative to the valve inlet and valve outlet axis.

A hydraulic system for motor vehicles, said hydraulic system comprising:

• a master cylinder, a slave cylinder, a fluid conduit connecting said cylinders for carrying a pressure-transmitting fluid, and at least one pressure relief valve positioned in the conduit between the cylinders and having a valve inlet and a valve outlet, wherein the relief valve is operable in response to fluid pressure and includes at least one port between the valve inlet and the valve outlet to provide fluid communication between the valve inlet and the valve outlet, wherein an elastic body overlies the at least one port to block flow therethrough and to allow flow through the port when the pressure of the fluid on one side of the valve exceeds a predetermined pressure value, to cause the elastic body to move away from the port and allow flow therethrough, and wherein the valve includes an internal cylindrical member having an inner surface that communicates with one of the valve inlet and the valve outlet, and an outer surface that communicates with the other of the valve inlet and the valve outlet, and the port extends substantially radially through a wall of the cylindrical member, and the elastic body is a tubular member that engages one of the outer surface and the inner surface of the cylindrical member.

A hydraulic system for motor vehicles, said hydraulic system comprising:

• a master cylinder, a slave cylinder, a fluid conduit connecting said cylinders for carrying a pressure-transmitting fluid, and at least one pressure relief valve positioned in the conduit between the cylinders and having a valve inlet and a valve outlet, wherein the relief valve is operable in response to fluid pressure and includes at least one port between the valve inlet and the valve outlet to provide fluid communication between the valve inlet and the valve outlet, wherein an elastic body overlies the at least one port to block flow therethrough and to allow flow through the port when the pressure of the fluid on one side of the valve exceeds a predetermined pressure value, to cause the elastic body to move away from the port and allow flow therethrough, wherein the elastic body includes a reinforcement element, and wherein the reinforcement element is selected from the group consisting of woven fabric materials, spiral wound materials, and annular elements.

A hydraulic system for motor vehicles, said hydraulic system comprising:

• a master cylinder, a slave cylinder, a fluid conduit connecting said cylinders for carrying a pressure-transmitting fluid, and at least one pressure relief valve positioned in the conduit between the cylinders and having a valve inlet and a valve outlet, wherein the relief valve is operable in response to fluid pressure and includes at least one port between the valve inlet and the valve outlet to provide fluid communication between the valve inlet and the valve outlet, wherein an elastic body overlies the at least one port to block flow therethrough and to allow flow through the port when the pressure of the fluid on one side of the valve exceeds a predetermined pressure value, to cause the elastic body to move away from the port and allow flow therethrough, wherein at least two spaced ports are provided in a flow path of the fluid between the valve inlet and the valve outlet and each port is blocked by an elastic member, and wherein the ports are spaced axially from each other relative to the valve inlet axis.

A hydraulic system for motor vehicles, said hydraulic system comprising:

• a master cylinder, a slave cylinder, a fluid conduit connecting said cylinders for carrying a pressure-transmitting fluid, and at least one pressure relief valve positioned in the conduit between the cylinders and having a valve inlet and a valve outlet, wherein the relief valve is operable in response to fluid pressure and includes at least one port between the valve inlet and the valve outlet to provide fluid communication between the valve inlet and the valve outlet, wherein an elastic body overlies the at least one port to block flow therethrough and to allow flow through the port when the pressure of the fluid on one side of the valve exceeds a predetermined pressure value, to cause the elastic body to move away from the port and allow flow therethrough, wherein at least two spaced ports are provided in a flow path of the fluid between the valve inlet and the valve outlet and each port is blocked by an elastic member, and wherein each elastic member blocks fluid flow from a different direction relative to the valve inlet.

A hydraulic system for motor vehicles, said hydraulic system comprising:

• a master cylinder, a slave cylinder, a fluid conduit connecting said cylinders for carrying a pressure-transmitting fluid, and at least one pressure relief valve positioned in the conduit between the cylinders and having a valve inlet and a valve outlet, wherein the relief valve is operable in response to fluid pressure and includes at least one port between the valve inlet and the valve outlet to provide fluid communication between the valve inlet and the valve outlet, wherein an elastic body overlies the at least one port to block flow therethrough and to allow flow through the port when the pressure of the fluid on one side of the valve exceeds a predetermined pressure value, to cause the elastic body to move away from the port and allow flow therethrough, wherein at least two spaced ports are provided in a flow path of the fluid between the valve inlet and the valve outlet and each port is blocked by an elastic member, and wherein each elastic member opens its associated port at a different fluid pressure level.

A hydraulic system for motor vehicles, said hydraulic system comprising:

• a master cylinder, a slave cylinder, a fluid conduit connecting said cylinders for carrying a pressure-transmitting fluid, and at least one pressure relief valve positioned in the conduit between the cylinders and having a valve inlet and a valve outlet, wherein the relief valve is operable in response to fluid pressure and includes at least one port between the valve inlet and the valve outlet to provide fluid communication between the valve inlet and the valve outlet, wherein an elastic body overlies the at least one port to block flow therethrough and to allow flow through the port when the pressure of the fluid on one side of the valve exceeds a predetermined pressure value, to cause the elastic body to move away from the port and allow flow therethrough, wherein at least two spaced ports are provided in a flow path of the fluid between the valve inlet and the valve outlet and each port is blocked by an elastic member, and wherein one elastic member contacts an outer cylindrical surface and another elastic member contacts an inner cylindrical surface, and wherein each tubular member is responsive to a different fluid pressure for opening its respective port.

A hydraulic system for motor vehicles, said hydraulic system comprising:

• a master cylinder, a slave cylinder, a fluid conduit connecting said cylinders for carrying a pressure-transmitting fluid, and at least one pressure relief valve positioned in the conduit between the cylinders and having a valve inlet and a valve outlet, wherein the relief valve is operable in response to fluid pressure and includes at least one port between the valve inlet and the valve outlet to provide fluid communication between the valve inlet and the valve outlet, wherein an elastic body overlies the at least one port to block flow therethrough and to allow flow through the port when the pressure of the fluid on one side of the valve exceeds a predetermined pressure value, to cause the elastic body to move away from the port and allow flow therethrough, wherein at least two spaced ports are provided in a flow path of the fluid between the valve inlet and the valve outlet and each port is blocked by an elastic member, and wherein the elastic members are tubular members and have substantially the same outer and inner diameters.

A hydraulic system for motor vehicles, said hydraulic system comprising:

• a master cylinder, a slave cylinder, a fluid conduit connecting said cylinders for carrying a pressure-transmitting fluid, and at least one pressure relief valve positioned in the conduit between the cylinders and having a valve inlet and a valve outlet, wherein the relief valve is operable in response to fluid pressure and includes at least one port between the valve inlet and the valve outlet to provide fluid communication between the valve inlet and the valve outlet, wherein an elastic body overlies the at least one port to block flow therethrough and to allow flow through the port when the pressure of the fluid on one side of the valve exceeds a predetermined pressure value, to cause the elastic body to move away from the port and allow flow therethrough, and including a temporary bypass path that extends between the valve inlet and the valve outlet.

A hydraulic system for motor vehicles, said hydraulic system comprising:

• a master cylinder, a slave cylinder, a fluid conduit connecting said cylinders for carrying a pressure-transmitting fluid, and at least one pressure relief valve positioned in the conduit between the cylinders and having a valve inlet and a valve outlet, wherein the relief valve is operable in response to fluid pressure and includes at least one port between the valve inlet and the valve outlet to provide fluid communication between the valve inlet and the valve outlet, wherein an elastic body overlies the at least one port to block flow therethrough and to allow flow through the port when the pressure of the fluid on one side of the valve exceeds a predetermined pressure value, to cause the elastic body to move away from the port and allow flow therethrough, wherein the at least one pressure relief valve damps vibrations of pressure-transmitting fluid having a frequency of less than about 1 kHz, and wherein the at least one pressure relief valve damps vibrations transmitted by an internal combustion engine of a motor vehicle.

A hydraulic system for motor vehicles, said hydraulic system comprising:

• a master cylinder, a slave cylinder, a fluid conduit connecting said cylinders for carrying a pressure-transmitting fluid, and at least one pressure relief valve positioned in the conduit between the cylinders and having a valve inlet and a valve outlet, wherein the relief valve is operable in response to fluid pressure and includes at least one port between the valve inlet and the valve outlet to provide fluid communication between the valve inlet and the valve outlet, wherein an elastic body overlies the at least one port to block flow therethrough and to allow flow through the port when the pressure of the fluid on one side of the valve exceeds a predetermined pressure value, to cause the elastic body to move away from the port and allow flow therethrough, wherein two oppositely acting pressure relief valves are carried in one housing, and including a unitary elastic member that overlies each of two spaced ports, wherein the elastic member swells when in contact with pressure-transmitting fluid to seal a gap within the relief valve that when in an unsealed condition allows flow of pressure-transmitting fluid between the valve inlet and the valve outlet.