Apparatus and method for sampling headspace gas of cans

• US 3,203,248 A
• Filed: 04/19/1963
• Issued: 08/31/1965
• Est. Priority Date: 04/19/1963
• Status: Expired due to Term

• Current Assignee: James R. Stutler, Philip E. Dakin
• Original Assignee: James R. Stutler, Philip E. Dakin
• Inventors: Stutler, James R., Dakin, Philip E.
• Application Number:
  US04/274,157
• Time in Patent Office: 865 Days
• US Class Current: 73/863.85
• CPC Class Codes: G01N 2001/2229 Headspace sampling, i.e. vapour over liquid
• CPC Class Codes: G01N 2033/0081 containers; packages; bottles
• CPC Class Codes: G01N 30/06 Preparation
• CPC Class Codes: G01N 30/24 Automatic injection systems
• CPC Class Codes: G01N 33/0011 Sample conditioning in general G01N1/28
• CPC Class Codes: Y10T 436/204998 Inorganic carbon compounds
• CPC Class Codes: Y10T 436/209163 Dissolved or trace oxygen or oxygen content of a sealed environment
• CPC Class Codes: Y10T 436/25875 Gaseous sample or with change of physical state

Claims

1. APPARATUS FOR SAMPLING GAS PRESENT IN THE HEADSPACE OF A CLOSED CONTAINER COMPRISING MEANS FOR PIERCING THE CONTAINER TO ESTABLISH COMMUNICATION WITH THE HEADSPACE THEREOF, A CYLINDER, A PISTON MOVABLE IN SAID CYLINDER, A CONDUIT CONNECTING SAID PIERCING MEANS WITH SAID CYLINDER ON ONE SIDE OF SAID PISTON, A VALVE OPERABLE FOR OPENING AND CLOSING SAID CONNECTION, MEANS FOR ADMITTING PURGING GAS TO THE CYLINDER DURING MOVEMENT OF THE PISTON AWAY FROM SAID CONDUIT TO A FIRST POSITION AND WHILE SAID VALVE IS CLOSED, MEANS FOR MOVING THE PISTON FROM SAID FIRST POSITION TOWARDS SAID CONDUIT TO A SECOND POSITION, MEANS FOR OPENING SAID VALVE DURING SAID MOVEMENT OF THE PISTON FROM THE FIRST TO SECOND POSITIONS TO THEREBY EXPEL THE PURGING GAS FROM THE CYLINDER VIA SAID PIERCING MEANS, MEANS FOR CAUSING RELATIVE MOVEMENT OF SAID CONTAINER AND PIERVING MEANS TO EFFECT SAID PIERCING AND MEANS CONTROLLING SAID PISTON MOVING MEANS FOR EFFECTIVE RECIPROCATION OF THE PISTON A SECOND TIME FOR ADMITTING THE HEADSPACE GAS VIA SAID PIERCING MEANS INTO THE CYLINDER AND FOR EXPELLING IT FROM THE CYLINDER TO A SAMPLE RECEIVER.