Bi-metal feed screw for screw presses
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 5, 1991
Issued Date -
N/A
app pub date -
Oct 19, 1989
filing date -
May 6, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A cast-formed bi-metallic worm in a mechanical screw press for expressing liquids from fibrous materials and a method of manufacture thereof. The worm is rotatably driven by the presses drive shaft and includes a body adapted to slidably engage around and be driven by the drive shaft and a flight extending radially outward from within the body. The body is formed of a ductal homogeneous cast material while the flight, which may be continuous or split, is cast formed of a harder homogeneous material so as to mechanically engage within and be rotatably driven by the body. The worm may also include a wear resistant cast-formed shell around the periphery of the body formed of either the same material as the flight or another hard wear resistant material.
First Claim
all claims..Other Claims data not available
Family

- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
Patent Owner | Address | |
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THE DUPPS COMPANY | GERMANTOWN OHIO 45327 |
International Classification(s)

- 1989 Application Filing Year
- B30B Class
- 128 Applications Filed
- 2 Patents Issued To-Date
- 1.57 % Issued To-Date
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
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Mansfield, Peter W | Holmes Beach, FL | 18 | 137 |
# of filed Patents : 18 Total Citations : 137 |
Cited Art Landscape
- No Cited Art to Display

Patent Citation Ranking
- 7 Citation Count
- B30B Class
- 0 % this patent is cited more than
- 34 Age
Forward Cite Landscape
- No Forward Cites to Display

Maintenance Fees
Fee | Large entity fee | small entity fee | micro entity fee | due date |
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Fee | Large entity fee | small entity fee | micro entity fee |
---|---|---|---|
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 |
Full Text

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