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US 7,740,415 B1Granted
Manhole cutting and removing device
OwnerMichael Critesinventor
Life of this patent
Estimating the term…
Abstract
A device to secure, cut and sequentially remove a manhole from a street environment. The manhole removing device is supported and rotatably driven hydraulically by a mobile operation equipment. A circular disk assembly has adjustable pavement cutters adjustably positioned from there within inter-related manhole centering and a locking alignment and engagement plate assembly define a one-step cutting and removal of an existing manhole from the street for replacement.
Claims4
A device for securing, cutting, and removing a manhole assembly from a street surface comprising,
- a cutting assembly for being rotated about a central vertical access to cut a circular slot about a manhole,
- said cutting assembly having pairs of adjustably extending blade mounting arms, cutting blades depending from each of the free ends of said mounting arms in spaced annular relation to one another,
- an alignment and extraction assembly selectively secured within said manhole independent of said cutting assembly,
- oppositely disposed engagement arm elements adjustably extending from said alignment and extraction assembly,
- a blade drive and extraction shaft extending from said cutting assembly freely through said alignment and extraction assembly.
2 more elements
Dependencies are inferred from the claim text.