Apparatus adapted to be coupled to a traction vehicle serving for the maintenance or construction of water-bound roads

Claim 1

An apparatus capable of being coupled to a traction vehicle and used for the construction or maintenance of water-bound roads or the like, comprising an undercarriage, a main support unit bearing upon said undercarriage, a road surface-breaker beam member and a levelling member, means pivotably connecting both said breaker beam member and said levelling member with said main support unit independently of one another for movement about at least one axis extending transverse with respect to the lengthwise axis of the apparatus, means selectively positioning said breaker-beam member and said levelling member independentLy from another at a respective predetermined spacing with respect to said main support unit, guide means displaceably connecting the rear end of said main support unit with said undercarriage, means connected with said guide means in order to control the height of said rear end of said main support unit above the ground, said undercarriage being provided with a pair of travelling wheel members and means including steering means controlling both wheel members of said undercarriage for the purpose of synchronously controlling said wheel members as a function of the angle between the lengthwise axis of the apparatus and that of the traction vehicle, and wherein said steering means comprises a double-arm lever member mounted at said main support unit and capable of being connected with said traction vehicle, and further incorporates two single arm lever members each coupled with a respective vertically arranged pivot means provided for each travelling wheel member of said undercarriage, a respective end of the double-arm lever member being coupled via an associated traction cable with a free end of an associated one of said single lever arm member.

Claim 2

An apparatus capable of being coupled to a traction vehicle and used for the construction or maintenance of water-bound roads or the like, comprising an undercarriage, a main support unit bearing upon said undercarriage, a road surface-breaker beam member and a levelling member, means pivotably connecting both said breaker beam member and said levelling member with said main support unit independently of one another for movement about at least one axis extending transverse with respect to the lengthwise axis of the apparatus, means selectively positioning said breaker-beam member and said levelling member independentLy from another at a respective predetermined spacing with respect to said main support unit, guide means displaceably connecting the rear end of said main support unit with said undercarriage, means connected with said guide means in order to control the height of said rear end of said main support unit above the ground, said undercarriage being provided with a pair of travelling wheel members and means including steering means controlling both wheel members of said undercarriage for the purpose of synchronously controlling said wheel members as a function of the angle between the lengthwise axis of the apparatus and that of the traction vehicle, and wherein said steering means comprises a double-arm lever member mounted at said main support unit and capable of being connected with said traction vehicle, and further incorporates two single arm lever members each coupled with a respective vertically arranged pivot means provided for each travelling wheel member of said undercarriage, a respective end of the double-arm lever member being coupled via an associated traction cable with a free end of an associated one of said single lever arm member.

Claim 3

An apparatus capable of being coupled to a traction vehicle and used for the construction or maintenance of water-bound roads or the like, comprising an undercarriage, travelling wheel means provided for said undercarriage, a main support unit bearing upon said undercarriage and its wheel means, a road surface-breaker beam member and a levelling member, means pivotably connecting both said breaker beam member and said levelling member with said main support unit independently of one another for movement about at least one axis extending transverse with respect to the lengthwise axis of the apparatus, means selectively positioning said breaker-beam member and said levelling member independently from another at a respective predetermined spacing with respect to said main support unit, and guide means displaceably connecting the rear end of said main support unit with said undercarriage, means connected with said guide means in order to control the height of said rear end of said main support unit above the ground, and wherein said means for positioning said levelling member incorporates a vertically extending guide block deposed at said rear end of said main support unit, pin members provided at the rear face of said levelling member extending into said guide block, and a blocking belt member insertable into a transverse bore of said guide block serving as a stop means for limiting the upward and/or downward movement of the levelling member.

Claim 4

An apparatus capable of being coupled to a traction vehicle and used for the construction or maintenance of water-bound roads or the like, comprising an undercarriage, travelling wheel means provided for said undercarriage, a main support unit bearing upon said undercarriage and its wheel means, a road surface-breaker beam member and a levelling member, means pivotably connecting both said breaker beam member and said levelling member with said main support unit independently of one another for movement about at least one axis extending transverse with respect to the lengthwise axis of the apparatus, means selectively positioning said breaker-beam member and said levelling member independently from another at a respective predetermined spacing with respect to said main support unit, and guide means displaceably connecting the rear end of said main support unit with said undercarriage, means connected with said guide means in order to control the height of said rear end of said main support unit above the ground, and wherein said means for positioning said levelling member incorporates a vertically extending guide block deposed at said rear end of said main support unit, pin members provided at the rear face of said levelling member extending into said guide block, and a blocking belt member insertable into a transverse bore of said guide block serving as a stop means for limiting the upward and/or downward movement of the levelling member.