초록 ▼

A valve (10) is used to introduce fluid from a syringe (22) into the inlet (88) of the pump of an HPLC instrument (12). The valve includes a valve body (14) that is connected to the HPLC instrument for fluid flow communication with the instrument inlet. A valve rotor (16) is rotatably engaged with t

A valve (10) is used to introduce fluid from a syringe (22) into the inlet (88) of the pump of an HPLC instrument (12). The valve includes a valve body (14) that is connected to the HPLC instrument for fluid flow communication with the instrument inlet. A valve rotor (16) is rotatably engaged with the valve body. A collar fitting (18) included on the valve rotor is connectable to the syringe. The syringe acts as a valve lever, and is displaceable to rotate the valve rotor about an axis of rotation (32) between an “off”position, in which fluid flow between the syringe and the HPLC instrument inlet is prevented, and an “on”position, in which fluid flow between the syringe and the HPLC instrument inlet is permitted. The valve enables one-handed priming operation.

대표청구항 ▼

A valve for use in controlling fluid flow between an inlet of an analytical instrument and a syringe, the valve comprising: a valve body including a first fitting portion that can be coupled to the analytical instrument inlet, the valve body defining a cylindrical valve seat surface and a first pass

A valve for use in controlling fluid flow between an inlet of an analytical instrument and a syringe, the valve comprising: a valve body including a first fitting portion that can be coupled to the analytical instrument inlet, the valve body defining a cylindrical valve seat surface and a first passage extending from an inlet port opening onto the valve seat surface to an outlet port opening through a distal end of the first fitting portion; and a valve rotor including an engagement portion for rotatably engaging with the valve body and a second fitting portion, the engagement portion defining a cylindrical valve sealing surface that mates with the cylindrical valve seat surface of the valve body in a male-female arrangement, the second fitting portion projecting radially from the valve rotor, the valve rotor further defining a second passage extending from an inlet port defined by the second fitting portion to an outlet port opening onto the cylindrical valve sealing surface, the second fitting portion of the valve rotor sized to engage a distal fitting of a syringe, the syringe acting as a lever for rotation of the valve rotor when the syringe is engaged with the valve rotor to rotate the valve rotor about an axis of rotation between an off position, in which the outlet port of the valve rotor is nonaligned with the inlet port of the valve body to prevent fluid flow through the valve, and an on position, in which the outlet port of the valve rotor is aligned with the inlet port of the valve body to permit fluid flow from the syringe through the valve to the instrument inlet.