Dual-piston pump apparatus

F - Mech Eng,Light,Heat,Weapons – 04 – B

Patent

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Details

F04B 53/22 (2006.01) F01B 31/00 (2006.01) F04B 7/02 (2006.01) F04B 15/02 (2006.01) F04B 53/14 (2006.01)

Patent

CA 2203542

A dual-piston pump apparatus (12) includes a pair of reciprocating sleeves (78) within which a pair of reciprocating pistons (80) are disposed. The pistons (112) and sleeves (78) are each supported on a frame (10) for independent movement along a line angled relative to horizontal by an angle less than about 45 degrees. The apparatus also includes a piston construction including a removable face (112) which permits the piston to be broken down for cleaning. Each piston (80) is normally restricted by a stop from extension beyond the end of the corresponding sleeve, but an actuator is provided for freeing the piston (80) relative to the sleeve (78) so that the piston (80) may be extended beyond the sleeve (78) and the sleeve may be withdrawn from a pump chamber of the apparatus.

Pompe (12) à deux pistons qui comporte une paire de manchons (78) effectuant un mouvement de va-et-vient à l'intérieur d'une paire de pistons (80) effectuant un mouvement de va-et-vient. Lesdits pistons (112) et manchons (78) sont supportés par un châssis (10) en vue d'un mouvement indépendant le long d'une ligne formant, par rapport à l'horizontale, un angle inférieur à 45 degrés. Ledit appareil possède également une configuration de piston comportant une face amovible (112) qui permet le démontage du piston en vue de son nettoyage. Chaque piston (80) est normalement retenu par un arrêt qui l'empêche de se déplacer au-delà de l'extrémité du manchon correspondant, mais un actionneur permet de libérer le piston (80) par rapport au manchon (78) si bien que le piston (80) peut se déplacer au-delà du manchon (78) et que ledit manchon peut être retiré d'une chambre de pompe de l'appareil.

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