Hydraulic control valve with pressure sensing means

Details Hydraulic control valve with pressure sensing means Hydraulic control valve with pressure sensing means

F - Mech Eng,Light,Heat,Weapons

15

B

138/79, 137/84

F15B 13/00 (2006.01) F15B 13/02 (2006.01)

Patent

CA 1332691

Abstract A hydraulic control valve with pressure sensing means comprises a slide (1) with two annular slide grooves (4, 5). At the centre, the housing has an annular pump groove (13), to both sides thereof an annular motor groove (14, 15), beyond same an annular container groove (16, 17) and, still further outside, an annular pressure sensing groove (18, 19). Throttle profilings (9, 10, 11, 12) adjoining the annular slide grooves (4. 5) are restricted to circumferential sections. Offset therefrom circum- ferentially, there is at least one pressure sensing orifice (20, 22) at the slide circumference. It is connected to an outlet aperture (21, 23) by way of a connecting passage in the slide The outlet aperture communicates with an annular sensing pressure groove (18, 19) at least in the operative position of the slide (1). This results in a compact construction with little dead play. Fig. 2

588332

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