Bi-metal feed screw for screw presses

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 4996919
SERIAL NO

07411191

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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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.

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Patent Owner(s)

Patent OwnerAddress
THE DUPPS COMPANYGERMANTOWN OHIO 45327

International Classification(s)

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  • 1989 Application Filing Year
  • B30B Class
  • 128 Applications Filed
  • 2 Patents Issued To-Date
  • 1.57 % Issued To-Date
Click to zoom InYear of Issuance% of Matters IssuedCumulative IssuancesYearly Issuances198919901991199219931994199519960255075100

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Mansfield, Peter W Holmes Beach, FL 18 137

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Patent Citation Ranking

  • 7 Citation Count
  • B30B Class
  • 0 % this patent is cited more than
  • 34 Age
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