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Machine translation
1. (WO1981000890) RECIPROCATING PUMP
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1981/000890    International Application No.:    PCT/JP1980/000010
Publication Date: 02.04.1981 International Filing Date: 25.01.1980
IPC:
F04B 53/10 (2006.01)
Applicants:
Inventors:
Priority Data:
79/129701 18.09.1979 JP
Title (EN) RECIPROCATING PUMP
(FR) POMPE ALTERNATIVE
Abstract: front page image
(EN)A suction hole (91a) and a discharge hole (91b) are formed at the center mnd on the outer periphery of a valve seat (91) mounted at the end of a cylinder (5) in a reciprocating pump. A suction valve (92) and a discharge valve (93) are provided at the inner and outer surfaces of the valve seat (91) at a cylinder chamber (5a) side to be urged toward the valve seat (91) by first and second valve springs (94) and (95). Further, a spring retainer (11) is provided midway along the cylinder (5) through which a plunger (7) is telescoped to allow passage of the plunger (7) for supporting the first valve spring (94) so that the position for the plunger (7) to complete its reciprocating motion is provided in the vicinity of the valve (93) to thereby reduce the excessive volume and accordingly the residual air amount so as to improve the rise at restarting time.
(FR)Un orifice d"admission (91a) et un orifice de refoulement (91 b) sont formes au centre et sur la peripherie externe d"un siege de soupape (91) montes a l"extremite d"un cylindre (5) dans une pompe alternative. Une soupape d"admission (92) et une soupape de refoulement (93) sont prevues sur les surfaces interieure et exterieure du siege de soupape (91) sur le cote d"une chambre cylindrique (5a), pour etre actionnees vers le siege de soupape (91) par un premier et un second ressorts de soupape (94 et 95). En outre, un dispositif de retenue a ressort (11) est prevu a mi-chemin le long du cylindre (5) par l"intermediaire duquel un piston (7) est telescope pour permettre le passage du piston (7) de maniere a supporter le premier ressort de soupape (94) pour que la position du piston (7) pour terminer son mouvement alternatif soit au voisinage de la soupape (93) de maniere a reduire le volume et par consequent la quantite d"air residuel en vue d"ameliorer la montee au moment du redemarrage.
Designated States:
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)