Manhole ring saw cutting device

Details Manhole ring saw cutting device Manhole ring saw cutting device

2007-06-14

2009-02-24

Singh, Sunil (Department: 3672)

Mining or in situ disintegration of hard material

Hard material disintegrating machines

Floor-working

C030S105000, C125S013030

Reexamination Certificate

active

07494191

ABSTRACT:
A ring saw device used in the installation of manholes to afford proper installation height and angular inclination compliant to street surface. The ring saw cutting device has a support ring base that acts as an elevated and inclination guide with a dual axis cutting assembly rotatably disposed therewithin.

REFERENCES:
patent: 4924951 (1990-05-01), Paulson
patent: 5934820 (1999-08-01), Hinkle
patent: 6131557 (2000-10-01), Watson
patent: 6161985 (2000-12-01), Hinkle et al.
patent: 6536987 (2003-03-01), Chang
patent: 6709064 (2004-03-01), Nettek
Exhibit A Whirly Gig Company printout, undated.

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