Expansible chamber devices – With removal conduit for liquid seepage from expansible chamber
Patent
1984-11-08
1986-02-25
Freeh, William L.
Expansible chamber devices
With removal conduit for liquid seepage from expansible chamber
92 865, 92170, 92168, 417568, F01B 3110, F16J 1518, F04B 3902
Patent
active
045720568
ABSTRACT:
The present invention relates to a plunger or floating piston pump which is particularly adapted for use as a small-size metering pump in performing chemical analyses. In a pump head casing there is disposed a plunger guide bushing made of a ceramic material in which a plunger made of sapphire is slidably guided permanently with extreme accuracy in relation to the bore in an annular seal, said annular seal itself cooperating with said plunger in such a way that there is no clearance between the plunger and said plunger guide bushing. In a modification of the invention, said displacement chamber is formed in a pump head liner which is mounted in said pump head casing. The pump head liner is made of a chemically inert material, preferably of a ceramic material.
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Freeh William L.
Saphirwerk Industrieprodukte AG
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