Cleaning and liquid contact with solids – Processes – Hollow work – internal surface treatment
Patent
1992-05-21
1993-09-21
Morris, Theodore
Cleaning and liquid contact with solids
Processes
Hollow work, internal surface treatment
134 2212, 134166R, 134166C, 134167C, 134167R, 134168R, 134168C, 134169R, 134169C, 1341021, 134172, 134178, B08B 100, B08B 900, B08B 904
Patent
active
052465020
ABSTRACT:
A valve bushing cleaning device for cleaning a valve bushing while the bushing is situated in a valve bore of a valve body, such as in a railway vehicle brake apparatus and a method for cleaning such valve bushing. The cleaning device comprises a hollow cylindrical conduit having a first open end attachable to a source of pressurized fluid and a second closed end. The conduit has a recessed portion with fluid passageways through the wall thereof and structure for securing a sealing member on each side of the fluid passageways. In the method, the closed end of the cleaning device is inserted into a valve bushing disposed in a valve bore of a valve body, with pressurized fluid forced through the conduit, out of the fluid passageways, and through apertures in the valve bushing, with any solids picked up and carried by the fluid through passages formed in the valve body.
REFERENCES:
patent: 2136881 (1938-11-01), Johnson
patent: 4765405 (1988-08-01), Clark
Gumbert Richard H.
Hartzell Thomas M.
Markos Ronald M.
Matthews Alvin J.
El-Arini Zeinab
Morris Theodore
Westinghouse Air Brake Company
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