Metal working – Method of mechanical manufacture – Process for making bearing or component thereof
Reexamination Certificate
2011-04-12
2011-04-12
Bryant, David P (Department: 3726)
Metal working
Method of mechanical manufacture
Process for making bearing or component thereof
C029S724000, C029S898020, C184S005100, C184S007400, C222S559000
Reexamination Certificate
active
07921565
ABSTRACT:
A working fluid injection apparatus has an upper chamber that stores a working fluid and a lower chamber that removably receives a bearing unit having a housing and a shaft that is inserted in the housing to form between the shaft and the housing a gap into which the working fluid is to be injected. A partition divides the upper chamber and the lower chamber into top and bottom parts, respectively. A first exhaust system brings the inside of the upper chamber to a decompressed state. A second exhaust system brings the inside of the lower chamber to a decompressed state. A valve unit opens and closes an internal cavity of the lower chamber relative to an external environment. A tapered hole is formed in the partition and communicates the upper and lower chambers to one another. A tapered shaft is inserted into the tapered hole from the upper chamber. A shaft drive unit moves the tapered shaft in the axial direction in the tapered hole.
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Makishima Yutaka
Nemoto Naoki
Teraya Junji
Adams & Wilks
Bryant David P
Seiko Instruments Inc.
Walters Ryan J
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