Pressure sensitive valve system and process for forming said system

• Main Authors: BERNARD COHEN, LEE KIRBY JAMESON
• Format: Patent
• Language: English
• Published: 01.09.1994
• Edition: 5
• Subjects: ACTUATING-FLOATS; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; BANDAGES, DRESSINGS OR ABSORBENT PADS; BLASTING; COCKS; CONTROLLING; CUTTING; CUTTING-OUT; DEVICES FOR VENTING OR AERATING; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF,TUBULAR STRUCTURES OF THE BODY, E.G. STENTS; ENGINEERING ELEMENTS AND UNITS; FILTERS IMPLANTABLE INTO BLOOD VESSELS; FIRST-AID KITS; FOMENTATION; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HAND CUTTING TOOLS; HEATING; HUMAN NECESSITIES; HYGIENE; LIGHTING; MECHANICAL ENGINEERING; MEDICAL OR VETERINARY SCIENCE; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; PERFORATING; PERFORMING OPERATIONS; PHYSICS; PROSTHESES; PUNCHING; REGULATING; SEVERING; SEVERING BY MEANS OTHER THAN CUTTING; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; STAMPING-OUT; SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES; TAPS; THERMAL INSULATION IN GENERAL; TRANSPORTING; TREATMENT OR PROTECTION OF EYES OR EARS; VALVES; WEAPONS; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

A thin elastomeric polymeric sheet material having at least about 100 valves per square inch is disclosed. In some embodiments the valves are microvalves where the maximum functional aperture of each of the microvalves generally ranges from greater than about 10 square micrometers to less than about 100,000 square micrometers. Also disclosed is a one-way valve system.