Sanitary pump and sanitary valve

Details Sanitary pump and sanitary valve Sanitary pump and sanitary valve

2006-07-11

2006-07-11

Freay, Charles G. (Department: 3746)

Pumps

Expansible chamber type

Including valve assembly, disassembly, or inspection...

C417S536000, C137S542000, C137S543230

Reexamination Certificate

active

07074020

ABSTRACT:
A sanitary pump and sanitary valve is provided employing a dual action piston for providing a constant pressure metering and delivery of fluids utilizing a drive shaft positively driven and controlled by a drive motor for sanitary applications. The sanitary pump may be fabricated from materials which do not include surface imperfections that would allow the growth of bacteria or allow the contamination of products that may be precisely metered by the sanitary pump. The sanitary pump includes sanitary check valves for opening and closing a high speed dependably and reliably and cycles up to 200 cycles per minute and preferably in the range of 60 to 160 cycles per minute by providing guides for maintaining check valve stem stability. The sanitary pump further includes compression seals for sealing the drive piston to maintain high reliability and dependability in high speed constant pressure applications.

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