Patent ID: 6253659
Filing Date: 2001-07-03
Classification: F16K,Y10S,Y10T

Abstract:
A piston control system, comprising:a cylinder, having an inlet opening and an outlet opening;a housing defining a first chamber associated with the inlet opening;a housing defining a second chamber associated with the outlet opening, said housing further defining an exit opening;a pressure source coupled to the first chamber associated with the inlet opening;a piston positioned slidably within the cylinder and forming a first closed chamber therein;a first flexible band disposed in the first chamber associated with the inlet opening and configured to selectively cover and uncover the inlet opening, the band being attached at one end within said first chamber associated with the inlet opening and extending toward the inlet opening within the first chamber then curving back away from the inlet and extending back away from the inlet and extending slidably through the housing out of the first chamber associated with the inlet opening, and having a free end moveable toward and away from the housing to cause the first flexible band to cover and uncover the inlet opening;a second flexible band disposed in the second chamber associated with the outlet opening and configured to selectively cover and uncover the exit opening, the band being attached at one end within said second chamber associated with the outlet opening and extending toward the exit opening within the second chamber then curving back away from the exit opening and extending back away from the exit opening and extending slidably through the housing out of the second chamber associated with the outlet opening and having a free end moveable to cover and uncover the exit opening; the piston being controllably moveable by pressure in the first closed chamber within the cylinder by moving the free ends of the first and second bands to selectively cover and uncover the inlet opening and exit opening to open and close the inlet opening and exit opening.