Valves and valve actuation – Tube compressors – Roller tube contacting element
Reexamination Certificate
2005-08-18
2009-08-11
Rivell, John (Department: 3753)
Valves and valve actuation
Tube compressors
Roller tube contacting element
C251S004000, C604S034000, C604S250000
Reexamination Certificate
active
07571889
ABSTRACT:
A tube clamp includes a housing1that has an inner cavity2longitudinally passing through the housing1and an upper window3, and a roller4that is mounted in the housing with its cylindrical surface positioned at the upper window and is movable longitudinally in the inner cavity. A pair of guide grooves6is formed along the upper window and guides a roller shaft5. A distance between a bottom face7of the inner cavity and the guide grooves is smaller in a pinching region7bthan in an open region7a. When the roller is positioned in the pinching region, a tube11is closed between the roller and the bottom face, and when the roller is positioned in the open region, the flow path in the tube is opened. The tube clamp further includes a slider8that is attached over the roller and is movable together with the roller in the inner cavity. The slider has slider shafts9that are provided on each side of the rear end of the slider and engaged with the guide grooves, and bearing notches10that are provided on the lower sides of the front end of the slider and fitted to the roller shaft for supporting the roller. The tube clamp can be operated easily with a light force and exert a sufficient force to close the tube.
REFERENCES:
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patent: 4337791 (1982-07-01), Tech et al.
patent: 4340201 (1982-07-01), Becker, Jr.
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patent: 6536739 (2003-03-01), Jensen
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patent: 7-39581 (1995-02-01), None
patent: 7-100207 (1995-04-01), None
patent: 9-508840 (1997-09-01), None
International Search Report from the corresponding PCT/JP2005/015082, mailed Nov. 22, 2005.
Japanese Office Action, dated Oct. 28, 2008.
Hamre Schumann Mueller & Larson P.C.
JMS Co. Ltd.
Rivell John
Rost Andrew J
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