Cutting by use of rotating axially moving tool – Tool or tool with support – Hollow milling tool
Patent
1986-04-21
1987-01-20
Watts, Douglas D.
Cutting by use of rotating axially moving tool
Tool or tool with support
Hollow milling tool
30276, 51241VS, 408207, 408211, B24B 1926
Patent
active
046377620
ABSTRACT:
A valve refacing tool having a housing with a bore therethrough which includes a large-diameter portion at one end thereof. A substantially cylindrical support is disposed within the large-diameter portion of the bore and is removably fixed to the housing, as by a plurality of screws extending radially therebetween. This cylindrical support has a small-diameter cylindrical opening which extends axially from the inner end thereof, and which communicates with the small-diameter end of a truncated conical recess which opens outwardly through the other axial end thereof. This conical recess accommodates the head of a poppet valve. A plurality of cutting blades are secured in angularly spaced relationship around the conical recess. The cylindrical support is split into a plurality of separable arcuate sectors, and each is individually fixedly but releasably secured to the housing. The cylindrical support defines a conical recess having a first angle suitable for refacing valve seats of that angle, but the cylindrical support can be replaced by a second cylindrical support having a different conical angle for refacing valve seats having this latter angle.
REFERENCES:
patent: 1124885 (1915-01-01), Gesswein
patent: 1235959 (1917-08-01), Bradfield
patent: 1450116 (1923-03-01), Ruhlandt
patent: 1604966 (1926-11-01), Brooks et al.
patent: 1830179 (1931-11-01), Stowell
patent: 1884460 (1932-10-01), Williams
patent: 3354528 (1967-11-01), Appleby
Zim Manufacturing Company Service Tools brochure (Catalog No. AT-19), (cover and p. 15).
Neway Manufacturing, Inc.
Watts Douglas D.
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