A stopcock, comprising a housing element defining a central bore and at least first, second and third ports; and a handle element which is selectably positionable relative to the housing element; at least one of the housing element and the handle element defining: a first fluid flow passageway communicating between two of the at least first, second and third ports; a second fluid flow passageway communicating between at least two of the at least first, second and third ports, and a fluid flow guide associated with the second fluid flow passageway, the fluid flow guide extending radially towards an inner facing wall of the central bore.

The invention discloses a rotation-type flow path switching valve, which includes a driving component and a valve body component connected with a driving shaft. The valve body component includes a valve body, and a spool. The valve body component further includes: a driving disc, and a driven disc which is connected, by means of a first gap linkage mechanism, with the driving disc to transfer an axial movement within a preset swivel stroke of the driving disc. The driving shaft and the spool are connected by means of a second gap linkage mechanism to transfer the axial movement to the spool within a preset swivel stroke of the driving shaft. The valve body component further includes a spring which makes the spool abut against the valve body.

A stopcock, comprising a housing element defining a central bore and at least first, second and third ports; and a handle element which is selectably positionable relative to the housing element; at least one of the housing element and the handle element defining: a first fluid flow passageway communicating between two of the at least first, second and third ports; a second fluid flow passageway communicating between at least two of the at least first, second and third ports, and a fluid flow guide associated with the second fluid flow passageway, the fluid flow guide extending radially towards an inner facing wall of the central bore.

A control valve includes a casing and a rotor. The casing has an inlet and an outlet. The rotor has a peripheral wall in which communication ports are formed. The peripheral wall of the rotor has a gradually decreasing diameter surface of which an outer diameter gradually decreases from one end side to the other end side in an axial direction and in which the communication port is formed. The rotor accommodating portion of the casing has a rotor guide surface in which an amount of protrusion inward in the radial direction gradually increases from one end side to the other end side in the axial direction, and of which an inner end surface in the radial direction is slidably in contact with the gradually decreasing diameter surface of the peripheral wall. An outlet is disposed in a part of the rotor guide surface so as to face the peripheral wall of the rotor.

The present invention discloses an oil-gas dual-purpose integrated switch. The oil-gas dual-purpose integrated switch comprises a valve and a knob switch for controlling an ignition coil and a carburetor solenoid valve; the valve cap is fixed on the valve body to form a valve cavity; the valve core is disposed in the valve body; the valve core passes through the valve cap to be fixed with the knob of the knob switch such that when the knob switch is rotated, the valve core is driven to rotate; the valve body is provided with an oil inlet pipe joint, an oil outlet pipe joint, a gas inlet pipe joint and a gas outlet pipe joint which are communicated with the valve cavity; the valve core is provided with an oil duct, and a gas duct. The oil-gas dual-purpose integrated switch can switch the oil path and the gas path randomly.

The present invention discloses an oil-gas dual-purpose integrated switch. The oil-gas dual-purpose integrated switch comprises a valve and a knob switch for controlling an ignition coil and a carburetor solenoid valve; the valve cap is fixed on the valve body to form a valve cavity; the valve core is disposed in the valve body; the valve core passes through the valve cap to be fixed with the knob of the knob switch such that when the knob switch is rotated, the valve core is driven to rotate; the valve body is provided with an oil inlet pipe joint, an oil outlet pipe joint, a gas inlet pipe joint and a gas outlet pipe joint which are communicated with the valve cavity; the valve core is provided with an oil duct, and a gas duct. The oil-gas dual-purpose integrated switch can switch the oil path and the gas path randomly.

The invention discloses a rotation-type flow path switching valve, which includes a driving component and a valve body component connected with a driving shaft. The valve body component includes a valve body, and a spool. The valve body component further includes: a driving disc, and a driven disc which is connected, by means of a first gap linkage mechanism, with the driving disc to transfer an axial movement within a preset swivel stroke of the driving disc. The driving shaft and the spool are connected by means of a second gap linkage mechanism to transfer the axial movement to the spool within a preset swivel stroke of the driving shaft. The valve body component further includes a spring which makes the spool abut against the valve body.

Various systems, methods and apparatuses for a rotary valve are disclosed. A rotary valve apparatus may have a case, a fluid conducting apparatus inside the case, and an electromagnetic actuator. The electromagnetic actuator may align the fluid conducting apparatus with various ports in the case. In this manner, fluid may be conducted through the ports. The electromagnetic actuator may rotate the fluid conducting apparatus to align with different ports in the case. Thus, the apparatus may operate as a valve, connecting and disconnecting various ports in response to the electromagnetic actuator.

A valve device comprises a valve, housing, first and second seals. The valve includes a shaft, a rotor connected to the shaft in a first direction, and a first flow path having a first opening. The housing includes a space accommodating the valve, and a second flow path having a second opening in the space. The first seal is between an outer surface of the rotor and an inner surface of the space, and includes a first portion in the first direction and a second portion in a second direction. The second seal is in the second direction, and is between an outer surface of the valve and an inner surface of the space. The valve has a communication path connecting another space with the first flow path, the another space being surrounded by the outer surface of the valve, inner surface of the space, second portion, and second seal.

A valve device comprises a valve, housing, biasing member, and a first seal. The valve includes a shaft rotatable about a rotation axis and a rotor connected to the shaft, and, on an outer circumferential surface of the rotor there is a first flow path having a first opening. The housing includes a space for accommodating the valve, and a second flow path having a second opening communicable with the first opening, the space having on its inner circumferential surface the second opening. The biasing member biases the rotor in a first direction. The first seal is disposed between the outer surface of the rotor and the inner surface of the space. The rotor is pressed against the first seal by the biasing member with a surface of the rotor that faces in the first direction not in contact with the inner surface of the space.