Patent ID: 8734736

Claim:
An article of laboratory glassware for directing flow of chemical materials, the article comprising: a glass manifold having a plurality of input ports and at least one output port; and a plurality of stopcocks, each stopcock having an inlet port and an outlet port for carrying the flow of and controlling the flow of chemical materials, each stopcock further having a rotating plug, wherein each of the stopcock outlet ports is connected to one of the manifold input ports, and wherein each of the stopcock inlet ports is connected with one end of one of a plurality of hollow glass tubes, and wherein the other end of each of the plurality of hollow glass tubes is connected to a female ground glass joint, wherein each of the rotating plugs comprises a first elongated opening and a second elongated opening connected by a passageway through the rotating plug thereby connecting the inlet port and the outlet port of each stopcock, and further wherein the first and the second elongated openings define an area for carrying the flow of chemical materials, and wherein the area varies with the rotation of the rotating plug over an angle of rotation that exceeds an angle subtended by an arc length that is twice the width of the stopcock inlet port or twice the width of the stopcock outlet port, wherein each of the at least one output ports of the manifold is terminated to a male ground glass joint.