Dana Corporation

Daryl A Sinclair

Myles E Davis

Clifford Krieger

James P Beatty

Jim Beatty

Thomas E Castaldi

Alexander L Grant

Method and apparatus for eliminating turbulence-induced noise in a pulsation-absorbing flexible hose, as in a hydraulic power steering system containing a pressure fluid-feeding pump and a steering gear operated by the pressure fluid discharged from the pump. The hose has a restrictor positioned in the hose bore, and the restrictor has a flow-through bore of smaller diameter than that of the adjacent wall of the hose bore. The flow-through bore has a venturi tube cross section. The restrictor venturi inlet, throat and outlet are designed so as to efficiently conduct fluid therethrough by matching the characteristics of the fluid, the operational pressures, fluid density and other system parameters such that the venturi operates below the lower critical value of the Reynolds number of fluid flow through the restrictor to thereby minimize or eliminate fluid turbulence in the restrictor outlet and/or immediately downstream thereof.

Method and apparatus for reduction of fluid-borne noise in hydraulic systems

A power steering assembly is provided that enables a secure, simultaneous connection of supply and return hose assemblies to a steering gear. The assembly includes a mounting bracket having an aperture through which one of the hose assemblies extends and a notch configured to receive the other hose assembly. The bracket is deformable such that the other hose assembly can be secured within the notch after insertion. The pressure and return hose assemblies include either a connector having opposed shoulders on either side of the bracket or are deformed to create beads on either side of the bracket to restrict movement thereby eliminating welds or brazes. Each of the hose assemblies further includes a groove formed to receive a seal. These grooves on the external portion of the hose assemblies reduce costly machining on the steering gear head.

Single point steering gear hydraulic connection

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Clarkston, MI, United States of America

Daryl A Sinclair