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Machine translation
1. (WO1980001940) BALANCED SPOOL VALVE
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1980/001940    International Application No.:    PCT/US1979/000132
Publication Date: 18.09.1980 International Filing Date: 05.03.1979
IPC:
F16K 11/07 (2006.01)
Applicants:
Inventors:
Priority Data:
US79/00132 05.03.1979 WO
Title (EN) BALANCED SPOOL VALVE
(FR) SOUPAPE A TIROIR EQUILIBRES
Abstract: front page image
(EN)A spool valve (10) has a spool (12 or 112) provided with a relatively narrow land (14 or 114) at a pump to tank valve passage (36-27-26-28-35-34), and longitudinal metering slots (14a & 14b or l14a & 114b) in the land (14 or 114) surface. Pressure across the spool (12 or 112) is balanced by a plurality of shallow recesses (46 or 146) which are evenly circumferentially distributed about the land (14 or 114) surface in spaced relationship to any of the metering slots (14a & 14b or 114a & 114b) and intersecting bores (47 or 147a & 147b) in the land (14 or 114) which provide communication between all the recesses (46 or 146).
(FR)Une soupape a tiroir (10) possede un tiroir (12 ou 112) pourvu d"une saillie relativement etroite (14 ou 114) a un passage de soupape de pompe a reservoir (36-27-26-28-35-34), et des fentes de calibrage longitudinales (14a et 14b ou 114a et 114b) dans la surface de la saillie (14 ou 114). La pression sur le tiroir (12 ou 112) est equilibree par une pluralite d"evidements (46 ou 146) qui sont repartis uniformement sur la circonference de la saillie (14 ou 114) de maniere espacee par rapport aux fentes de calibrage (14a et 14b ou 114a et 114b) et aux alesages d"intersection (47 ou 147a et 147b) dans la saillie (14 ou 114) qui assurent la communication entre tous les evidements (46 ou 146).
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)