Pipes and tubular conduits – With flow regulators and/or baffles – Restrictors
Reexamination Certificate
2006-10-03
2006-10-03
Hook, James (Department: 3754)
Pipes and tubular conduits
With flow regulators and/or baffles
Restrictors
C138S030000
Reexamination Certificate
active
07114525
ABSTRACT:
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.
REFERENCES:
patent: 1847086 (1932-03-01), Gargan
patent: 2146100 (1939-02-01), Walch
patent: 2223242 (1940-11-01), Sweet, Jr.
patent: 2790463 (1957-04-01), Delano et al.
patent: 3109459 (1963-11-01), Lee, II
patent: 3146798 (1964-09-01), Chenault
patent: 3894562 (1975-07-01), Moseley, Jr. et al.
patent: 4285534 (1981-08-01), Katayama et al.
patent: 4426213 (1984-01-01), Stavropoulos
patent: 4762150 (1988-08-01), Kokuryu
patent: 5094271 (1992-03-01), Fritz et al.
patent: 5111660 (1992-05-01), Gettel
patent: 5529244 (1996-06-01), Horvath, Jr. et al.
patent: 5582006 (1996-12-01), Phillips
patent: 5728981 (1998-03-01), van Ruiten
patent: 5749396 (1998-05-01), Takahashi et al.
patent: 5906225 (1999-05-01), Stark et al.
patent: 6024129 (2000-02-01), Schima
patent: 6035897 (2000-03-01), Kozyuk
patent: 6073656 (2000-06-01), Chen et al.
patent: 6119728 (2000-09-01), Seidel-Peschmann et al.
patent: 6269841 (2001-08-01), Chen et al.
patent: 6279613 (2001-08-01), Chen et al.
patent: 6419278 (2002-07-01), Cunningham
patent: 6442838 (2002-09-01), Mussler
patent: 6591870 (2003-07-01), Bhattacharyya et al.
patent: 0305877 (1989-03-01), None
patent: 1162399 (2001-12-01), None
EPO Search Report Applicant: Dana Corporation Ref. No. P102079EP00/FRC Patent No. 04255183, Dec. 2004.
Beatty James P
Castaldi Thomas E
Davis Myles E
Krieger Clifford P
Sinclair Daryl A
Dana Corporation
Hook James
Reising Ethington Barnes Kisselle P.C.
LandOfFree
Method and apparatus for reduction of fluid-borne noise in... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for reduction of fluid-borne noise in..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for reduction of fluid-borne noise in... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3676467