manner. Thecasting used for such a purpose is technically called a foot-piece. The type of foot-piece devised by Mr. Frizell is shown inFig. 4. In the specifications for his patent it is described asfollows: [436] DAVIS & WEIDNER—THE AIR LIFT PUMP 33 Into the bottom of the rising-pipe is fitted… … Fig. 4.—Frizells Foot-Piece. Fig. 5.—Pohles Foot-Piece. The lower end expands to a greater width than that of therising-pipe in order to diminish the resistance of the water inentering. The pipe D, leading from the source of compressed airopens into the annular space E E. The pipe D, which conveys…
Pumping machinery · Compressed air
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