Pipette safety device

• US 3,343,422 A
• Filed: 08/12/1965
• Issued: 09/26/1967
• Est. Priority Date: 08/12/1965
• Status: Expired due to Term

• Current Assignee: Dwight G. Mcsmith
• Original Assignee: Dwight G. Mcsmith
• Inventors: Mcsmith, Dwight G.
• Application Number:
  US04/479,354
• Time in Patent Office: 775 Days
• US Class Current: 73/864.03
• CPC Class Codes: B01L 3/021 Pipettes, i.e. with only one conduit for withdrawing and redistributing liquids
• CPC Class Codes: B01L 3/0213 Accessories for glass pipettes; Gun-type pipettes, e.g. safety devices, pumps

Claims

1. A MOUTH PROTECTIVE SAFETY DEVICE FOR USE WITH A PIPETTE WHEN EXTRACTING MEASURED QUANTITIES OF HAZARDOUS LIQUIDS COMPRISING:

A SEPARABLE CONTAINER, PLIABLE MEANS DIVIDING SAID CONTAINER INTO TWO COMPARTMENTS, FIRST TUBULAR MEANS LEADING FROM ONE OF SAID COMPARTMENTS AND ADAPTED TO SERVE AS A MOUTHPIECE, SECOND TUBULAR MEANS LEADING FROM THE OTHER OF SAID COMPARTMENTS AND ADAPTED TO FRICTIONALLY ENGAGE A PIPETTE, WHEREBY UPON APPLICATION OF SUCTION ON SAID MOUTHPIECE SAID PLIABLE MEANS WILL MOVE IN SAID ONE COMPARTMENT TOWARD SAID MOUTHPIECE CAUSING A PARTIAL VACUUM IN SAID OTHER OF SAID COMPARTMENTS AND THEREBY PERMIT THE AMBIENT AIR PRESSURE TO FORCE A QUANTITY OF THE HAZARDOUS LIQUID INTO SAID PIPETTE WITHOUT ENDANGERING THE MOUTH TO THE LIQUID OR ITS FUMES.