Abstract: A leak resistant reclosable plastic closure structure with stable interlocking fastener strips particularly suited for resealable and reopenable plastic film pouches or other flexible containers. The closure comprises first and second extruded thermoplastic continuous fastener strips having longitudinally extending engagable profiles having flanges affixed along the opening walls of a pouch forming marginal portions thereon.The first strip profile having a resilient central arch sealing means flanked by outward locking shoulders and walls that join at right angles to flanges forming a gap spanned by said film completing the exterior of a cavity therein.

Abstract: An elastomer ring seal for pressurized fluids that is particularly suited for preventing unidirectional fluid flow between outer and inner cylindrical surfaces of two or more mating members, which resists permanent deformation, and is highly leak resistant.The ring seal has an annular body with a central longitudinal axis and an irregular polygonal profile in right cross section comprising a solid base portion at its back axial end, concentric outer and inner asymmetrical independent arm members axially extending from said base portion to its front axial end. The arm members are set apart from each other by a deep annular depression which forms opposing radial walls of said arm members.The outer arm, configured to resist compression strain, includes; an outermost radial sealing portion near midpoint along the arm length; and includes a supporting narrow section toward the base portion, forming a thin flexible conical band around the ring seal outer side.

Abstract: The use of a probe for the control of foam build up in a fermenter, which probe comprises a guard electrode (13), first and second insulators (14 and 15) separated by the guard electrode, a detecting electrode (12) separated from the guard electrode by the first insulator, and a plug (18) and socket (17) for connecting the probe to a power source, the second insulator being provided with fermenter mounting means in the form of a flange (16), a sensor comprising the aforementioned probe for use with an antifoam supply regulator, a foam control system and a method of controlling the build up of foam in a fermentation vessel.

Abstract: A shaft or piston seal for preventing unidirection fluid flow between two concentric mating members has an annular body in the form of a ring-like member with a polygonal profile in right cross section having innermost and outermost radial portions. One of the innermost and outermost radial portions at one end of the body defines a hinge surface and the other of the innermost and outermost radial portions at a medial section of said body defines a sealing surface. The other end of said body defines a non-contact stabilizing section. The sealing surface is in the form of a sealing band which contacts one of the mating members, the hinge surface seated in the other mating member. The non-contact stabilizing member flexes and provides a counterforce for urging the sealing band against the one mating member.

Abstract: A fitting for receiving and locking a plastic tubing in place within it including a hollow tubular member having both compression and flexible locking barbs therein.

Abstract: An inspiratory force adapter designed to be connected between a tracheostomy tube and an inspiratory pressure gauge, comprising a hollow plastic body adapted to be grasped by the thumb and finger of the operator and having a finger port adapted to be closed by another finger of the operator when the inspiratory force of a patient is to be measured. The plastic body is provided with finger positioning surfaces so located as substantially to eliminate undesirable twisting motions of the adapter under the forces exerted by the operator's fingers.