Volumetric compressor of the roots type
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United States of America Patent
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Jun 19, 1984
Grant Date -
N/A
app pub date -
Feb 23, 1983
filing date -
Feb 23, 1982
priority date (Note) -
Expired
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Abstract
A Roots-type rotary volumetric compressor with two double-lobed rotors in which, for each of the four quadrants defined by the major and minor axes of the rotor, each rotor has a particular profile constituted by seven arcs of circles which extend from the point of intersection with the minor axis to the point of intersection with the major axis. The coordinates of the respective centers of curvature (C.sub.1 to C.sub.7) of the arcs in a frame of reference having its origin at the center of the rotor and its axes of the asbcissae (X) and ordinates (Y) coincident with the minor and major axes of the rotor, and the values of the respective radii of curvature (R.sub.1 to R.sub.7), are given. The arcs have respective angular extents (A.sub.1 to A.sub.7) of substantially 12.degree., 40.degree., 1.degree., 29.degree., 88.degree., 13.degree. and 6.degree..
First Claim
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- 15 United States
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- 8 Japan
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- 5 Korea
- 2 Other
Patent Owner(s)
Patent Owner | Address | |
---|---|---|
FIAT AUTO S P A AN ITALIAN JOINT STOCK COMPANY | CORSO GIOVANNI AGNELLI 200 10135 TORINO |
International Classification(s)
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
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Messori, Pier P | Pino Torinese, IT | 4 | 38 |
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Fee | Large entity fee | small entity fee | micro entity fee |
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Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
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