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Class 417/93 - Moving contracting chamber


Subclass of Class 417 - Pumps
Definition: Apparatus in which at least one wall of said chamber means
No. of patents: 2
Last issue date: 01/14/2003


NumberTitleIssue Date
6506033Miniature pump with ball-plate drive
A miniature pump equipped with: a pump chamber communicated with a suction port by way of a check valve and communicated with a discharge port by way of another check valve; a driving portion for performing a pump function by increasing and decreasing a v...
01/14/2003
4854783Vertical hydro-hoist with adjustable floats and method of operating the same
A vertical hydro-hoist for conveying a slurry under pressure by using a liquid obtained from a chemical process as a driving liquid and method for operating the same, the hydro-hoist includes at least one feed chamber and a detector for detecting a relati...
08/08/1989
 
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