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US 10,480,151 B1Granted
Manhole removal device for use with a manhole cutting and removing tool
OwnerMichael K. Critesinventor
Life of this patent
Estimating the term…
Abstract
An improved manhole alignment and locking assembly for use with a manhole removal tool. The locking and removal assembly provides for a portable adjustable manhole interior engagement plate, that once positioned and locked, provides for alignment of the manhole cutting and removal tool and subsequent lifting and transportation of the manhole from the street for repair or replacement.
Claims8
A manhole alignment, locking and removal tool assembly for selective and independent engagement within a manhole comprises,
- a main support housing, a pair of offset parallel guide and retainment slots in said housing,
- a pair of leg engagement supports slidably positioned within said guide and retainment slots,
- engagement and lifting legs adjustably disposed within and extending from said leg engagement supports through said support housing,
- a dual rack and pinion gear assembly within said slots and said housing, said leg engagement supports secured to said racks,
- a guide and extraction key-way in said housing for receiving an extraction drive shaft, key-way engagement tabs extending from said extraction drive shaft for selective engagement therewith and removal thereof,
- means for moving said tool assembly independently of said extraction drive shaft.
3 more elements
Dependencies are inferred from the claim text.