Abstract: A butterfly valve with an undulating sealing surface, which has an inflatable annular seal mounted in a housing. A disk is pivotally mounted in the housing and has an edge with an undulating sealing surface and a peripheral sealing edge. The undulating sealing surface of the disk and a sealing face of the annular seal have non-mating profiles when the valve is in an unsealed condition. Pressure in a chamber proximate the annular seal causes the face of the annular seal to expand and deform and the face forms a high-pressure seal between the sealing ridge and the annular seal. Also includes a method for stopping delivery, of a conduit transportable material through a butterfly valve.

Abstract: A butterfly valve for forming an enhanced seal between the disk and the annular seal through use of unmated surfaces on the sealing face of the disk and the sealing face of the annular seal.

Abstract: A butterfly valve with an undulating sealing surface, which has an inflatable annular seal mounted in a housing. A disk is pivotally mounted in the housing and has an edge with an undulating sealing surface and a peripheral sealing edge. The undulating sealing surface of the disk and a sealing face of the annular seal have non-mating profiles when the valve is in an unsealed condition. Pressure in a chamber proximate the annular seal causes the face of the annular seal to expand and deform and the face forms a high-pressure seal between the sealing ridge and the annular seal. Also includes a method for stopping delivery of a conduit transportable material through a butterfly valve.

Abstract: A linear vibrator having an internal cylindrical bearing surface forming a chamber therein and a fluid inlet to direct a fluid into the chamber with a one piece piston slideable located therein with the piston simultaneously rotatable and axially displaceable therein with the piston including a static port to bias the piston and thereby induce piston oscillation when fluid is introduced into the vibrator.

Abstract: A butterfly valve for forming an enhanced seal between the disk and the annular seal through use of unmated surfaces on the sealing face of the disk and the sealing face of the annular seal.

Abstract: A linear vibrator having an internal cylindrical bearing surface forming a chamber therein and a fluid inlet to direct a fluid into the chamber with a one piece piston slideable located therein with the piston simultaneously rotatable and axially displaceable therein with the piston including a static port to bias the piston and thereby induce piston oscillation when fluid is introduced into the vibrator.