Apparatus for screening and spreading bedding material in a ditc

Details Apparatus for screening and spreading bedding material in a ditc Apparatus for screening and spreading bedding material in a ditc

1994-02-01

1995-09-26

Corbin, David H.

Hydraulic and earth engineering

Miscellaneous

405157, 405179, F16L 1028

Patent

active

054529697

ABSTRACT:
An apparatus for spreading a bedding material in a ditch to provide a bedding layer for laying a pipe thereon is disclosed. The apparatus includes a screened opening which extends for selectively passing bedding material below a readily selected particulate size, and particulate matter above the selected particulate size is directed forward of the apparatus. The apparatus further includes a discharge opening having side plates which control the width of the bedding layer. The discharge opening also has a back-skid plate for controlling the vertical thickness of the bedding layer. The back-skid plate is a horizontally extending plate which is adjustable for selectively determining the vertical thickness of the bedding layer deposited.

REFERENCES:
patent: 3664137 (1972-05-01), Lett
patent: 4462715 (1984-07-01), Ashbaugh
patent: 4714381 (1987-12-01), Hatch
patent: 4741646 (1988-05-01), Hatch
patent: 4955756 (1990-09-01), Klamar
patent: 5145290 (1992-09-01), Wise
patent: 5158394 (1992-10-01), Bresnahan
patent: 5174685 (1992-12-01), Buchanan
patent: 5259699 (1993-11-01), Klamar

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