Static structures (e.g. – buildings) – With entrance for persons or objects in horizontal or... – With additional enclosure structure; e.g. – manhole
Reexamination Certificate
2011-06-28
2011-06-28
Canfield, Robert J (Department: 3633)
Static structures (e.g., buildings)
With entrance for persons or objects in horizontal or...
With additional enclosure structure; e.g., manhole
C052S040000, C052S169700, C052S169130, C052S298000
Reexamination Certificate
active
07966772
ABSTRACT:
A tubular insert sleeve for an excavated hole and a safety cover fitted to cover an operatively upper end of the insert sleeve are provided to maintain the integrity of an excavated hole and limit access to the hole in order to improve the safety of the public. The sleeve is made of cooperating segments which can easily be separated and which a form a sleeve when assembled. The operatively upper end of the assembled sleeve forms an outwardly extending bell-shaped end of greater outer diameter to define an outwardly extending flange which is more easily grasped for removal of the sleeve from an excavated hole.
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Bartels Bernard George
Bartels Darren Bernard
Beaudry Marc
Buuren Darren Van
Canfield Robert J
Carey Rodriguez Greenberg & Paul LLP
Demuren Babajide
Greenberg, Esq. Steven M.
Super Sucker Hydro Vac Service, Inc.
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