公开(公告)号：US3604267A

公开(公告)日：1971-09-14

申请号：US3604267D

申请日：1969-01-15

Applicant: BECKMAN INSTRUMENTS INC

Inventor： JOHNS THERON

IPC: B01J4/02 ,  G01N1/00 ,  G01N30/18

CPC classification number: G01N30/18 ,  G01N1/22

Abstract: Syringe-type apparatus for injecting a fluid sample into a fluid stream including a plunger section and a needle section enclosing a sample cavity of predetermined volume and diameter. The cavity includes a discharge opening in the front of the needle section and a gas inlet opening adapted to be opened or closed by a reciprocable plunger in the plunger section of the device. The plunger section also includes a gas inlet port through the sidewall thereof communicating with the inlet opening to the needle section when the plunger is in a retracted position. The needle section has a shoulder formed on the outer surface thereof at a position between the discharge opening and the inlet opening to the cavity. The shoulder is constructed to engage an abutment within a sample port thereby obstructing flow of the gas stream through the port and causing the gas stream to flow through the gas inlet port into the sample injector cavity to sweep the sample from the cavity.

公开(公告)号：US3533858A

公开(公告)日：1970-10-13

申请号：US3533858D

申请日：1967-11-02

Applicant: BECKMAN INSTRUMENTS INC

Inventor： SEIBEL ARTHUR C ,  JOHNS THERON

IPC: C23G5/028 ,  G01N30/66 ,  C23F7/00 ,  G01N27/18

CPC classification number: C23G5/028 ,  G01N30/66