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An easily-assembled, heat resistant connector for releasably joining end portions of three capillary tubes for use in chromatography without interrupting flow or interfering with chromatographic results comprises a main body, and a glass insert which has first, second and third hollow legs that are

An easily-assembled, heat resistant connector for releasably joining end portions of three capillary tubes for use in chromatography without interrupting flow or interfering with chromatographic results comprises a main body, and a glass insert which has first, second and third hollow legs that are connected together at a central portion, and a connector that connects each leg of the glass insert to a capillary tube. Each leg of the glass insert extends outwardly from the central portion towards an open end portion, and each leg has an inboard bore with a taper that receives and end portion of one of the capillary tubes. The taper is wider near the open end portion of the leg and narrower near the central portion. The connectors are mounted on the main body and a sealing ferrule is provided in each connector for making a seal between the capillary tubes and the legs of the glass insert. An adjusting screw in each connector provides for independently adjusting the pressure against each of the sealing ferrules to insure that an efficient seal is made between each capillary tube and a leg of the glass insert.

대표청구항 ▼

An easily-assembled, heat resistant connector (11) for releasably joining end portions of three capillary tubes (13, 14, 15) for use in chromatography without interrupting fluid flow or interfering with chromatographic results, comprising a main body (17) having a cylindrical wall (17a) and an inter

An easily-assembled, heat resistant connector (11) for releasably joining end portions of three capillary tubes (13, 14, 15) for use in chromatography without interrupting fluid flow or interfering with chromatographic results, comprising a main body (17) having a cylindrical wall (17a) and an interior space (17b) inside the wall (17a), a glass insert (19) having first (19a), second (19b) and third (19c) hollow legs which are connected together at a central portion (19d) and are spread apart, each leg (19a, 19b, 19c) extending outwardly from the central portion (19d) towards an open end portion, each leg (19a, 19b, 19c) having an inboard bore (21a, 21b, 21c) with a taper that receives an end portion of one of the capillary tubes (13, 14, 15), said taper being wider near the open end portion of the leg (19a, 19b, 19c) and narrower near the central portion (19d), each leg (19a, 19b, 19c) having an outboard bore (25) which is larger in diameter than the diameter of the inboard bore (21a, 21b, 21c), each leg outboard bore (25) having an open outer end and an inboard end with a stop shoulder (27), each leg outboard bore (25) having an inner surface (25a), a ferrule (29) seated on the stop shoulder (27) of each leg (19a, 19b, 19c) each ferrule (29) having a bore for receiving the end portion of one of the capillary tubes (13, 14, 15), each ferrule (29) being in the shape of a truncated cone with an inboard bottom base (29b) that is wider than its outboard top base (29c), and an inboard bottom portion (29d) with a cylindrical side surface, a number of openings in the main body, said openings being spaced apart around the wall of the main body, screw connector assembly means mounted on the main body in said openings and connected to the glass insert legs for holding the glass insert in place, with a first screw connector assembly (32) for controlling sealing pressure including a first screw support (33) having a hollow shaft (33a) with outer threads (33b), a knurled knob (33c) at the outboard end of the shaft (33a) for easily rotating the first screw support (33), an inboard bore (33d) formed in the first screw support (33), said screw support inboard bore (33d) fitting around the open end of the first leg (19a) of the glass insert (19), an outboard bore (33e) of the first screw support (33), said first screw support outboard bore (33e) having inner threads (33f), a ferrule seated in the cup at the open end portion of the legs, and an adjusting screw (35) having outer threads (35b) for screwing into the inner threads (33f) of the outboard bore (33e) of the first screw support (33) and squeezing the ferrule to form seals between the ferrule and the capillary tube and between the ferrule and the legs of the glass insert.