Pumps – Expansible chamber type – Bellows-type chamber
Patent
1990-09-18
1991-11-26
Bertsch, Richard A.
Pumps
Expansible chamber type
Bellows-type chamber
138119, 138 45, F04B 4312
Patent
active
050678795
ABSTRACT:
The invention relates to a tube for peristaltic pumps wherein rotating members progressively compress the tube to force fluid therethrough for discharging at an outlet end. The tube includes a pair of oppositely disposed longitudinally extending notches or grooves defined in the exterior surface thereof which enhance the flexing characteristics of the tube, permit the flattened cross-sectional area to completely seal with minimal force applied by the rotating members and controls the vacuum pressures generated. The depth and geometric configuration of the notches and the durometer of the tube may be selected to control the compression and expansion characteristics of the tube section to generate and control the desired vacuum or subatmospheric pressure levels for a particular application.
REFERENCES:
patent: 2406485 (1946-08-01), Arnold
patent: 2925045 (1960-02-01), Mascaro
patent: 3176622 (1965-04-01), Pfeiffer
patent: 3192863 (1965-07-01), Vadot
patent: 3446247 (1969-05-01), Manning
patent: 3721269 (1973-03-01), Choate et al.
patent: 3956544 (1976-05-01), Harrington
patent: 4131399 (1978-12-01), Calvet
Bertsch Richard A.
Freay Charles
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