Pumps – Expansible chamber type – Elongated flexible chamber wall progressively deformed
Reexamination Certificate
2007-08-09
2011-11-08
Kramer, Devon C (Department: 3746)
Pumps
Expansible chamber type
Elongated flexible chamber wall progressively deformed
Reexamination Certificate
active
08052403
ABSTRACT:
A peristaltic pump includes a support section and a rotor mounted for rotation on the support section. There are a pair of spaced apart cam elements attached to and extending from the rotor. A drive mechanism rotatably operates the rotor such that the cam elements are turned together with the rotor. There are first and second mounting sheaves connected to the support section. Each mounting sheave has a groove formed peripherally therein. An elongate, resilient tube conducts liquid therethrough. The tube includes leading and trailing tube segments and an intermediate tube segment formed longitudinally therebetween. The leading segment is retainably inserted in the groove of the first sheave and the trailing segment is retainably inserted in the groove of the second sheave to hold the intermediate segment of the tube for being operatively engaged by the cam elements as the rotor is operated. This causes liquid to be pumped peristaltically through the intermediate segment of the tube from the trailing segment to the leading segment.
REFERENCES:
patent: 2406485 (1946-08-01), Arnold
patent: 3172367 (1965-03-01), Kling
patent: 4231725 (1980-11-01), Hogan
patent: 4256442 (1981-03-01), Lamadrid et al.
patent: 4906168 (1990-03-01), Thompson
patent: 5041096 (1991-08-01), Beuchat et al.
patent: 2004/0213684 (2004-10-01), Klein
patent: 2007/0258838 (2007-11-01), Drake et al.
patent: 1753039 (1992-08-01), None
patent: WO 9412427 (1994-06-01), None
Kramer Devon C
Noonan William E.
Zollinger Nathan
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