F - Mech Eng,Light,Heat,Weapons – 04 – B
Patent
F - Mech Eng,Light,Heat,Weapons
04
B
103/142, 74/282
F04B 1/00 (2006.01) F04B 1/04 (2006.01) F04B 7/00 (2006.01) F04B 9/04 (2006.01) F04B 11/00 (2006.01) F16H 53/02 (2006.01)
Patent
CA 1254443
ABSTRACT A reciprocating pump comprises three parallel connected plunger piston arrangements and is driven via a cam mechanism (10) by means of a rotary driving device. In order to insure a constant discharge, the cam mechanism (10) comprises three plate cams (14) fixed on a common shaft (13) so that they are spaced 120° apart from each other, the displacement curve (a1;a2;a3) of each plate cam has an ascending region in which displacement increases as the angle of rotation of the plate cam increases, and a decending region in which displacement decreases as the angle of rotation of the plate cam increases, either the ascending region or the decending region including an accelerating section in which displacement acceleratingly changes, a uniform velocity section in which displacement linearly changes, and a decelerating section in which displacement deceleratingly changes, the arrangement being such that the sum of the displacement per unit angle of rotation in the accelerating section and the displacement per corresponding unit angle of rotation in the decelerating section is equal to the displacement per unit angle of rotation in the uniform velocity section.
485941
Fuji Techno Kogyo Kabushiki Kaisha
Ridout & Maybee Llp
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