초록 ▼

A pinch mechanism suitable for use as a valve or as part of a pump. The pinch mechanism comprises a housing (11) within which an elongate conduit element (12) is located. A conduit engagement member (13c) is retained within the housing (11) to be movable transverse to a longitudinal axis of the cond

A pinch mechanism suitable for use as a valve or as part of a pump. The pinch mechanism comprises a housing (11) within which an elongate conduit element (12) is located. A conduit engagement member (13c) is retained within the housing (11) to be movable transverse to a longitudinal axis of the conduit element (12). The engagement member has an end portion (13d) which engages with the conduit element (12), this end portion (13d) having a cross-sectional dimension less than the lateral inner dimension of the conduit element (12), this lateral dimension being at right angles to the direction of movement of the engagement member (13c).

대표청구항 ▼

A pinch mechanism suitable for use as a valve or as part of a pump. The pinch mechanism comprises a housing (11) within which an elongate conduit element (12) is located. A conduit engagement member (13c) is retained within the housing (11) to be movable transverse to a longitudinal axis of the cond

A pinch mechanism suitable for use as a valve or as part of a pump. The pinch mechanism comprises a housing (11) within which an elongate conduit element (12) is located. A conduit engagement member (13c) is retained within the housing (11) to be movable transverse to a longitudinal axis of the conduit element (12). The engagement member has an end portion (13d) which engages with the conduit element (12), this end portion (13d) having a cross-sectional dimension less than the lateral inner dimension of the conduit element (12), this lateral dimension being at right angles to the direction of movement of the engagement member (13c). joined to the central portion and adapted to be secured directly to the housing; and first and second projections extending generally axially outwardly from the central portion, each of the first and second projections including a sealing region adapted to be secured to the housing. 16. The diaphragm of claim 15 wherein the peripheral portion generally circumscribes the central axis. 17. The diaphragm of claim 15 wherein the first and second projections generally circumscribe the central axis and extend axially beyond the peripheral portion. 18. The diaphragm of claim 15 wherein the first and second projections are generally tubular. 19. The diaphragm of claim 15 further comprising a central opening. 20. The diaphragm of claim 15 wherein the diaphragm is made of one or more polymeric materials. 21. The diaphragm of claim 15 wherein the peripheral portion and the first and second projections are flexible to allow relative movement between the central portion and the pump housing, thereby pumping a fluid through the housing. 22. The diaphragm of claim 15 wherein, the central portion is spaced an equal distance from distal ends of the first and second projections when the diaphragm is in a relaxed position. 23. The diaphragm of claim 15 wherein, the central portion is closer to a distal end of the first projection than to a distal end of the second projection when the diaphragm is in a relaxed position. 24. A pump comprising: a housing defining an inlet port, an outlet port and a chamber in fluid communication with the inlet port and the outlet port; a diaphragm secured within the chamber and cooperating with the housing to define a fluid passageway between the inlet port and the outlet port, the diaphragm being movable between a discharge position in which fluid in the fluid passageway is discharged to the outlet port and an intake position in which fluid from the inlet port is passed to the fluid passageway, the diaphragm including a central blind aperture opening on a first side of the diaphragm; a rod slidingly received within the central aperture and being movable between a first position corresponding to the discharge position, and a second position corresponding to the intake position; an electromagnetic assembly secured to the housing and engaging the rod, the electromagnetic assembly operable to move the rod in a direction of movement toward one of the discharge position and the intake position; and a spring engaging the diaphragm and biasing the diaphragm against the rod, the spring also providing a biasing force substantially opposing the direction of movement of the electromagnetic assembly to move the diaphragm toward the other of the discharge position and the intake position. 25. The pump of claim 24 wherein the diaphragm is formed in a biased manner, the diaphragm biased toward one of the intake position and the discharge position. 26. The pump of claim 24 wherein the movement of the rod is limited to maintain a gap of separation between the rod and a core of the electromagnetic assembly. 27. The pump of claim 24 further comprising a seal fluidly isolating the fluid chamber from the spring. 28. The pump of claim 24 wherein the diaphragm is made of at least one polymeric material. 29. The pump of claim 24 further comprising a second spring biasing the rod toward the diaphragm. 30. The pump of claim 24 further comprising an inlet valve assembly positioned generally upstream of the chamber to control fluid flow between the inlet port and the fluid passageway, and an outlet valve assembly positioned generally downstream of the chamber to control fluid flow between the fluid passageway and the outlet port. 31. A diaphragm assembly for use in a pump, the assembly comprising: a plunger; a peripheral region adapted to be secured to a housing of a pump; an intermediate region joined to the peripheral region and including an insert providing increased rigidity to the central region with respect to the inte