Implement for cleaning box culverts

Claim 2

An implement for cleaning box culverts and other drains and waterways having a rectangular cross section, said implement comprising a body with means for plowing at its forward end and plunging means at its rearward end, said means for plowing directing material plowed loose by said plowing means upwardly and backwardly as well as laterally outwardly towards said plunging means, said implement further including a first water directing means for spraying water in advance of said plowing means and a second water directing means for simultaneously spraying water behind said plowing means but in advance of said plunging means, whereby any dirt clogging the culvert or the like is prewetted by said first water directing means before it is plowed loose and is further wetted by said second water directing means before it is swept forward by said plunging means.

Claim 3

The implement according to claim 1 wherein the plunging means comprises a gate.

Claim 4

The implement according to claim 2 having a second larger gate for attachment to said first gate to provide effective plunging means for larger box culverts or the like.

Claim 5

An implement for cleaning box culverts with a rectangular cross section, said implement comprising an elongated body having a plow at its forward end and a drag plate at its rearward end, said plow directing material plowed loose upwardly and backwardly as well as laterally outwardly and backwardly towards said drag plate, said plow and said drag plate being substantially the same width as the culvert being cleaned and said drag plate being substantially the same height as the culvert, said implement further including a first water directing means for spraying water in advance of said plow and a second water directing means for simultaneously spraying water behind said plow but in advance of said drag plate, whereby any dirt clogging the culvert is prewetted by said first water directing means before it is plowed loose and is further wetted by said second water directing means before it is swept forward by said drag plate.

Claim 6

An implement for cleaning box culverts with a rectangular cross section, said implement comprising an elongated body having a plow at its forward end and a drag plate at its rearward end, said plow directing material plowed loose upwardly and backwardly as well as laterally outwardly and backwardly towards said drag plate, said plow and said drag plate being substantially the same width as the culvert being cleaned and said drag plate being substantially the same height as the culvert, said implement further including a first water directing means for spraying water in advance of said plow and a second water directing means for simultaneously spraying water behind said plow but in advance of said drag plate, whereby any dirt clogging the culvert is prewetted by said first water directing means before it is plowed loose and is further wetted by said second water directing means before it is swept forward by said drag plate.

Claim 7

The implement according to claim 4 for cleaning box culverts having sidewalls and a ceiling wherein the second water directing means has nozzles for directing water upwardly towards the ceiling as well as laterally towards the sidewalls.

Claim 8

The implement according to claim 5 wherein the elongated body comprises a rectangular frame and wherein the drag plate is pivoted at one of its edges to the frame such that if said plate is too high for said culvert it can be effectively reduced in elevation to fit within said culvert.

Claim 9

The implement according to claim 6 wherein the drag plate is journaled in bearings selectively restricting the pivotal movement of said plate such that it can be pivoted from vertical in a direction away from the plow to some selected angle.

Claim 10

The implement according to claim 7 for use in culverts being wider or higher than the drag plate which further includes an auxiliary drag plate for attachment to said drag plate.

Claim 11

The implement according to claim 8 which further includes turnbuckle means attached to the drag plate for holding said drag plate at some angle within which it is otherwise permissibly restricted.

Claim 12

The implement according to claim 9 wherein the turnbuckle means are detachably attached to the drag plate and selectively attached to said auxiliary drag plate.