Segmented adjustment riser

Details Segmented adjustment riser Segmented adjustment riser

1994-10-03

1996-01-09

Buiz, Michael Powell

Road structure, process, or apparatus

Pavement

Vault cover-closure

404 26, E02D 2900

Patent

active

054824001

ABSTRACT:
A segmented adjustment riser for maintenance holes has a plurality of similar elongated one-piece segments. Each segment has two opposite ends provided with respective interengaging formations, and the segments are placed together end to end to form an endless riser member having planar upper and lower sides. The formations interengage and resist lateral displacement of each end of each segment relative to the adjacent end of each adjacent segment. The segments can be manufactured relatively easily and with greater economy than the corresponding one-piece riser member and facilitate handling and installation.

REFERENCES:
patent: Re34550 (1994-02-01), Bowman
patent: 4187647 (1980-02-01), Hall
patent: 4473024 (1984-09-01), Armstrong
patent: 4582450 (1986-04-01), Neil
patent: 4759656 (1988-07-01), Wilson
patent: 4867601 (1989-09-01), Bowman
patent: 5030030 (1991-07-01), Simmonds
patent: 5149109 (1992-09-01), Jelinek et al.
patent: 5158505 (1992-10-01), Woyach
patent: 5281046 (1994-01-01), Svirklye
patent: 5316522 (1994-05-01), Carbone et al.

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