Instrument for use in performing a controlled valsalva maneuver

• US 3,298,362 A
• Filed: 12/10/1963
• Issued: 01/17/1967
• Est. Priority Date: 12/10/1963
• Status: Expired due to Term

• Current Assignee: John H. Reed Jr, Maxwell W. Lippitt Jr
• Original Assignee: John H. Reed Jr, Maxwell W. Lippitt Jr
• Inventors: Lippitt, Maxwell W. Jr., Reed, John H. Jr.
• Application Number:
  US04/329,595
• Time in Patent Office: 1,134 Days
• US Class Current: 600/481
• CPC Class Codes: A61B 5/087 Measuring breath flow
• CPC Class Codes: A61B 5/0875 using means carried by the fluid stream, e.g. free floating balls
• CPC Class Codes: A61B 5/097 Devices for facilitating collection of breath or for directing breath into or through measuring devices
• CPC Class Codes: A63B 23/18 for improving respiratory function

Claims

1. IN AN INSTRUMENT OF THE CHARACTER DESCRIBED, A CYLINDRICAL TUBE HAVING A BORE EXTENDING THERETHROUGH AND PROVIDED AT ONE END WITH A MOUTHPIECE WHEREBY A PERSON MAY BLOW THROUGH THE MOUTHPIECE INTO THE TUBE;

A PISTON SLIDABLY MOUNTED WITHIN THE TUBE IN SUBSTANTIALLY AIRTIGHT RELATION WITH THE INNER WALL OF THE TUBE AND MOVABLE IN RESPONSE TO AIR PRESSURE COMMUNICATED TO THE TUBE THROUGH THE MOUTHPIECE;

ELASTIC MEANS CONNECTING THE PISTON TO SAID TUBE FOR YIELDABLY HOLDING THE PISTON IN A PREDETERMINED POSITION WITHIN THE TUBE, SAID ELASTIC MEANS BEING ADAPTED TO EXERT A TENSION FORCE ON THE PISTON IN COUNTERACTION TO AIR PRESSURE APPLIED AGAINST THE PISTON BY A PERSON EXHALING THROUGH THE MOUTHPIECE INTO THE TUBE TO THEREBY LIMIT THE MOVEMENT OF THE PISTON IN ACCORDANCE WITH THE MAGNITUDE OF THE PRESSURE, SAID