Thomas R Saunders

US Patent:

20030190384, Oct 9, 2003

Filed:

Apr 4, 2002

Appl. No.:

10/115661

Inventors:

Jackie Baldwin - Franklinville NC, US
Stephen Campion - Franklinville NC, US
David Posey - Staley NC, US
Thomas Saunders - Franklinville NC, US

International Classification:

B28B021/26

US Classification:

425/262000, 425/427000

Abstract:

A new and improved rollerhead for packerhead assemblies employed in concrete pipe making machines utilizing the packerhead method of pipe formation wherein the rollerhead includes a roller shaft having an upper end and a lower end, a hollow cylindrical roller body rotatably disposed around the roller shaft, a first bearing coaxially mounted about the upper end of the roller shaft and contacting an inside surface of the roller body, a second bearing coaxially mounted about the lower end of the roller shaft and contacting an inside surface of the roller body. The improvement comprises a roller body including a radially inwardly directed flange, an annular body mounted coaxially about the roller shaft, and an annular seal coaxially disposed about the annular body. The inwardly directed flange, annular body, and annular seal create a sealing system designed to prevent the infiltration of concrete contaminate matter into the rollerhead housing thus reducing wear on interior roller parts and lengthening the operative lifespan of the rollerhead assemblies.