US 4,861,199 AGranted

Slit trencher

OwnerAlfred Hackmackinventor

Life of this patent

Estimating the term…

Loading patent…

Abstract

A slit trencher can be mounted on a carrier machine which moves in a driving direction. The trencher includes a holder adapted to be mounted on the carrier machine. Also included is a boom mounted on this holder. The trencher has a circulating chain and a plurality of slit formers mounted on the circulating chain. The circulating chain mounted on the boom circulates thereon. This circulating chain is operable to perform work when circulating along a running direction. Each of the slit formers has a cutting edge slanted both with respect to the running direction of the chain and with respect to the driving direction of the carrier machine. These slit formers have a rear side and each includes a cover plate and a rear plate. The cover plate has a horizontal width sized to cover the width of the slit. This cover plate is slanted towards a direction opposite to the running direction of the circulator. The rear plate is mounted adjacent to the cover plate to block the rear side.

Claims18

Dependent claims

A slit trencher for mounting on a carrier machine which moves longitudinally in a driving direction, comprising:

a holding means adapted to be mounted on said carrier machine;
a boom mounted on said holding means;
a circulating means mounted on said boom to circulate thereon, said circulating means being operable to work when circulating along a running direction;
and
a plurality of slit formers mounted on said circulating means and each having a cutting edge slanted both laterally and longitudinally with respect to the running direction of the circulating means, said slit formers each having a rear side and each including:
(a) a cover plate-cutter combination having a horizontal width sized to cover the width of the slit, said cover plate-cutter combination being slanted in a direction outward and opposite to said running direction of said circulating means;
and
(b) a rear plate mounted adjacent to said cover platecutter combination to block the rear side, so that said cover plate-cutter combination excavates by lifting and pushing outwardly.

5 more elements

Dependencies are inferred from the claim text.