Pumps – Motor driven – With means to prevent heat transfer between pump and motor
Reexamination Certificate
2005-03-08
2005-03-08
Esquivel, Denise L. (Department: 3746)
Pumps
Motor driven
With means to prevent heat transfer between pump and motor
C417S413100, C417S572000, C417S313000, C092S187000, C092S140000, C092S144000, C165S185000
Reexamination Certificate
active
06863508
ABSTRACT:
A pump for gases to be measured having a pump housing in which a pump chamber is located. The pump chamber is sealed off by a working membrane that is connected to a crank drive by a connecting rod or similar lifting mechanism. A heating device is provided in an upper area of the pump housing, particularly in the pump head. Heat insulation covering at least the pump head is provided. The heat insulation is in the form of an insulating housing having an inner wall spaced apart from the pump head in order to form a gas insulation layer.
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http://www.pacificplus.com/products.htm, Pacific Plus International, Inc., Hwa Yang Stainless Steel Group, Products, p. 1, Aug. 10, 2004.
Guide to the Selection of The Surface Finish of Stainless Steel on Fabricated Items, SHAPA Technical Bulletin No. 1, Jan., 2000, p. 14.
Esquivel Denise L.
KNF Neuberger GmbH
Sayoc Emmanuel
Volpe and Koenig P.C.
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