Patent ID: 6862916

Claim:
A multiple valve apparatus for injecting a sample to be analyzed into a column of a gas chromatograph, said multiple valve apparatus comprising: an upper plate comprising at least one cavity for injecting activation gas and at least one recess for an elastomeric material; a first diaphragm disposed below said upper plate; a center plate disposed below said first diaphragm, said center plate having at least one port for injection of said sample; a second diaphragm disposed below said center plate; and a bottom plate comprising at least one cavity for injecting activation gas and at least one recess for an elastomeric material; wherein said first at least one recess is aligned with a first O-ring; wherein said second at least one recess is aligned with a second O-ring; and wherein the center plates comprises a thickness of about 0.25 inches and wherein the center plate comprises aluminum.