Pumps – Expansible chamber type – Inlet and discharge distributors at opposite ends of tubular...
Patent
1990-01-08
1991-07-23
Smith, Leonard E.
Pumps
Expansible chamber type
Inlet and discharge distributors at opposite ends of tubular...
417475, F04B 4308
Patent
active
050339435
ABSTRACT:
A pump (20) has a housing (22) consisting of top (24), bottom (26), sides (28) and (30) and ends (32), (34), and (36) defining a plenum (38). An axially extending passage (40) is formed by the ends (32) and (34), through which flexible tubing (42) passes. The plenum (38) is connected to the passage (40). A pressure block (44) is slideably positioned in the plenum (38) for movement toward and away from the flexible tubing (42). The pressure block (44) has a rectangular opening (46), which receives a circular bearing (48) and a circular cam (50) which is eccentrically mounted on shaft (52). Conventional ball valves (54) and (56) are provided in the flexible tubing (42) above and below the pressure block (44). The lifetime of the tubing is substantially enhanced if the pressure block (24) depresses the tubing (42 ) no more than half of its inside diameter. When this limitation is followed, no creasing or similar localized severe distortion of the tubing (42) takes place. Rounded corners (58) and rounded surface (59) of the pressure block (24) extending a substantial length along the tubing (42) further help to avoid creasing or other severe distortion of the tubing (42).
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Albo, IBM Technical Disclosure Bulletin, Positive Displacement Pump, Apr. 1965, vol. 7, No. 11.
Steripump, a Steridose Publication.
Durrum Emmett L.
Manning Leonard L.
Eldex Laboratories, Inc.
Smith Leonard E.
Szczecina Jr. Eugene L.
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