VALVE ARRANGEMENT FOR SUCTION TUBES

• US 3,705,601 A
• Filed: 04/06/1971
• Issued: 12/12/1972
• Est. Priority Date: 04/06/1970
• Status: Expired due to Term

• Current Assignee: Kjell Oystein Arisland
• Original Assignee: Kjell Oystein Arisland
• Inventors: Arisland, Kjell Oystein
• Primary Examiner(s): Klinksiek, Henry T.
• Assistant Examiner(s): Miller, Robert J.
• Application Number:
  US05/131,794
• Time in Patent Office: 616 Days
• Field of Search: 137/494,493,618,142,150.5,151 251/62,149,318
• US Class Current: 137/493
• CPC Class Codes: A47G 21/18 Drinking straws or the like as integral parts of drinking containers A47G19/2266; for therapeutic purposes A61J15/00 ; adapted to emerge from drinking containers when opened B65D77/283
• CPC Class Codes: A47G 2400/027 Non-return valves
• CPC Class Codes: A61M 1/7413 by changing the cross-section of the line
• CPC Class Codes: A61M 39/22 Valves or arrangement of valves A61M39/02, A61M39/0247, A61M39/16 take precedence; regulating valves in infusion systems A61M5/16881; in devices worn by the patient for the reception of urine, faeces, catamenial or other discharge, or in colostomy devices A61F5/4405
• CPC Class Codes: Y10T 137/7771 Bi-directional flow valves
• CPC Class Codes: Y10T 137/7781 With separate connected fluid reactor surface

Abstract

Valve arrangements for suction tubes, characterized by at least two pistons which are mutually mechanically connected and so designed that the one piston always is subject to pressure variations in the one end of the suction tube and the other piston always is subject to pressure variations in the other end of the suction tube. An underpressure in either one of the tube parts results in the effective piston surface which is exposed to the underpressure causing the valve to open.

Claims

1. A valve arrangement for suction tubes, characterized in that it comprises at least two pistons which are mutually mechanically connected and so designed that the one piston always is subject to pressure variations in the one end of the suction tube and the other piston always is subject to pressure variations in the other end of the suction tube, and in that an underpressure in one tube part involves that the effective piston surface which is exposed to the underpressure, causes opening of the valve.

2. A valve arrangement according to claim 1, characterized in that there are two pistons of said kind mutually mechanically connected and so designed that the sealing means of the pistons simultaneously moves against respective off the appurtenant valve seats, and in that a chamber is arranged between the valve seats.

3. A valve arrangement according to claim 2, characterized in that the two pistons are formed in one piece having U-form and where the pistons are positioned at the ends of the two branches of the U.

4. A valve arrangement according to claim 3, characterized in that the U-formed piece is guided by a stud extending between the said two branches, and in that the pistons are formed by parts extending perpendicularly to said branches.

5. A valve arrangement according to claim 3, characterized in that the U-formed piece has a web in the form of a slide guided in a cylinder, the one end of which is connected with the atmosphere, while the other end is connected with the valve seat openings, and in that the said branches extend therethrough.

6. A valve arrangement according to claim 5, characterized in the modification that the one branch and its piston as well as its corresponding valve seat are omitted.

7. A valve arrangement according to claim 2, characterized in that the pistons have angular arms, the parts of which positioned near the piston extend perpendicularly to the direction of movement of the pistons, and in that the free parts of the said arms extend parallelly into a common chamber where a gear wheel is arranged engaging the two free arm parts which are formed as racks.