A volumetric pump and its driving mechanism

Details A volumetric pump and its driving mechanism A volumetric pump and its driving mechanism

F - Mech Eng,Light,Heat,Weapons

04

B

F04B 7/00 (2006.01) F04B 1/047 (2006.01) F04B 1/053 (2006.01)

Patent

CA 2741509

There is described a volumetric pump comprises a housing (3) containing at least one hollow elongated part (2), at least one piston (4) arranged to move back and forth inside said elongated part (2), at least one inlet port (11 ) and at least one outlet port (111) arranged so that a fluid can be sucked through the inlet port (11) into a chamber during an instroke of the piston (4) and expelled from the chamber through the outlet port (111) during an outstroke of said piston (4). The pump further comprises a linearly and/or angularly actuable valve system (5, 5', 5") possessing at least one valve holder (5") mounted on the pump housing (3) such that a surface (7) of the valve holder (5") is held against a part (7') of the housing outer surface. The pump housing (3) comprises at least one through-hole (30) extending from the piston chamber to said part (7') of the housing outer surface. The valve holder (5") contains at least one inlet and/or outlet aperture(s)(31, 31') and is arranged to be actuable linearly and/or rotatably to align alternately the inlet and outlet apertures (31, 31 ') with the through-hole (30) of the housing (3) in order to connect alternately the inlet and outlet ports (11, 11 ') of the volumetric pump with the piston chamber during alternate piston instrokes and outstrokes.

L'invention concerne une pompe volumétrique comprenant un logement (3) contenant au moins une partie allongée creuse (2), au moins un piston (4) conçu pour effectuer un mouvement de va-et-vient à l'intérieur de ladite partie allongée (2), au moins un orifice d'admission (11) et au moins un orifice d'évacuation (111) conçus de sorte qu'un fluide puisse être aspiré par l'orifice d'admission (11) dans une chambre pendant la course de retour du piston (4) et évacué de la chambre par l'orifice d'évacuation (111) pendant une course d'aller dudit piston (4). La pompe comprend en outre un système de soupape pouvant être actionné de manière linéaire et/ou angulaire (5, 5', 5'') possédant au moins un support de soupape (5'') monté sur le logement de pompe (3) de sorte qu'une surface (7) du support de soupape (5'') est maintenue contre une partie (7') de la surface externe du logement. Le logement de pompe (3) comprend au moins un trou traversant (30) s'étendant depuis la chambre de piston vers ladite partie (7') de la surface externe du logement. Le support de soupape (5'') comprend au moins une ouverture d'admission et/ou d'évacuation (31, 31') et est agencé pour pouvoir être actionné de manière linéaire et/ou rotative de façon à aligner en alternance les ouvertures d'admission et d'évacuation (31, 31') avec le trou traversant (30) du logement (3) afin de relier en alternance les orifices d'admission et d'évacuation (11, 11') de la pompe volumétrique à la chambre de piston pendant les courses aller et les courses de retour du piston.

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