Piston pump for abrasive conveyances

Details Piston pump for abrasive conveyances Piston pump for abrasive conveyances

1986-09-16

1988-09-20

Freeh, William L.

Pumps

Expansible chamber type

Moving cylinder

92 87, 417568, F04B 1900, F04B 2900

Patent

active

047721847

ABSTRACT:
The invention relates to reciprocating pumps for liquids and gases, especially fluid-solid dispersions containing abrasives. The cylinder is made from material which is harder than the abrasive particles of the fluid. This cylinder rotates around the piston, independent of the number of strokes per minute, so that a lubricating film is formed. This rotation prevents both contact between the piston and the cylinder and freezing of the piston within the cylinder.

REFERENCES:
patent: 415497 (1889-11-01), Cavallaro
patent: 1527948 (1925-02-01), Word
patent: 1831411 (1931-11-01), Dietz
patent: 2220822 (1940-11-01), Grad
patent: 2529457 (1950-11-01), Nilsson
patent: 2776626 (1957-01-01), Bowman
patent: 3093087 (1963-06-01), Hansen
patent: 3142257 (1964-07-01), Schodt
patent: 3495544 (1970-02-01), Enssle
patent: 3507584 (1970-04-01), Robbins, Jr.
patent: 4477236 (1984-10-01), Elliott

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