Pump with an automatically adjusted output rate

Details Pump with an automatically adjusted output rate Pump with an automatically adjusted output rate

1979-05-07

1981-04-28

Croyle, Carlton R.

Pumps

Condition responsive control of drive transmission or pump...

Adjustable cam or linkage

92 131, F04B 4900

Patent

active

042642817

ABSTRACT:
A positive displacement pump, especially a high-pressure piston pump, has a piston which is mounted for reciprocation within a pumping chamber. The piston is reciprocated by a drive including a crank, a first connecting link eccentrically mounted on the crank, a second connecting link articulated to the first connecting link and to the piston, and a control link connected to said first and second connecting links for pivoting about a common axis therewith and having a free end portion supporting a roller movable along and in contact with a curved cam surface. The roller is held in contact with the cam surface by a pivotally mounted support link. A movable component of a cylinder-and-piston unit displaces the roller and thus the control link into selected positions along the cam surface in dependence on the pressure of a medium admitted thereto which corresponds to the pressure in the outlet port of the pump for adjusting the output rate of the pump to higher levels for lower pressures and to lower levels for higher pressures.

REFERENCES:
patent: 635258 (1899-10-01), Lange
patent: 1813078 (1931-07-01), Nyrop
patent: 2472104 (1949-06-01), Grant et al.
patent: 2830455 (1958-04-01), Harmon
patent: 2898867 (1959-08-01), Saalfrank
patent: 3901231 (1975-08-01), Olson

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