Apparatus for regeneration of skiing courses

Claim 3

An apparatus as claimed in claim 1, characterized in that the draw mounting frame 1 comprises two angular frame parts having legs extending longitudinally and legs extending transversely of the direction of travel, said longitudinal legs being connected by leg hinge means by draw rods so as to allow the draw rods to be swivelled in adaptation to the unevenness of the blanket of snow.

Claim 4

An apparatus as claimed in claim 2, characterized by a plurality of bearing forks on said transverse legs, said bearing forks carrying several juxtaposed planing bodies on draw rods respectively hinged to said legs.

Claim 5

An apparatus as claimed in claim 2, characterized by plough knives on said planing bodies, the arrangement being such that when the draw frame is lifted, the planing bodies rest, with their plane undersides, flatly on the blanket of snow, thereby enabling a levelling of the course, while when the draw frame is in its lowered position, the planing bodies pentrate into the blanket of snow with their planing knives, which are secured to the forward slanting front ends (12') thereof.

Claim 6

An apparatus as claimed in claim 2, characterized in that the angular frame parts are stiffened by diagonal members connecting the longitudinal legs to the transverse legs.

Claim 7

An apparatus as claimed in claim 2, characterized in that said guides are fastened to the transverse legs of the mounting frame and said hydraulic means act on said guides and on the upper ends of the supports.

Claim 8

An apparatus as claimed in claim 2, wherein said hydraulic means are connected by a metal piping system for the delivery and removal of a pressure medium to a valve block which is connected to a pump or a pressure medium reservoir having a control device operable from the driver's seat.

Claim 9

An apparatus as claimed in claim 2, characterized in that said piping is installed in the longitudinal and transverse legs.

Claim 10

An apparatus as claimed in claim 2, characterized in that the leg hinge means have a longitudinal axis and six juxtaposed planing bodies are swingably hinged, in two groups of three on opposite sides of saw axes, to the two transverse legs and so as to allow the planing bodies to be adapted transversely to the unevenness of the blanket of snow.

Claim 11

An apparatus as clainmed in claim 1, characterized in that the planing bodies are designed as hollow bodies whose side walls project towards the bottom of said bodies and form longitudinal track laminae.

Claim 12

An apparatus as claimed in claim 1, characterized in that two vertical bearing plates are secured at a distance from and parallel to one another on the upper side of each planning body, adjacent the central vertical plane of said body, and are connected by an angular rail at the front edges and by a flat strip at the rear edges of said plates, which rail and strip ensure the parallel position of the bearing plates, and in that there is secured to the rear end parts of each of said draw rods a vertically downwardly projecting longitudinal mounting plate, which engages between the bearing plates.

Claim 13

An apparatus as claimed in claim 2, characterized in that two vertical bearing plates are secured at a distance from and parallel to one another on the upper side of each planing body, adjacent the central vertical plane of said body, and are connected by an angular rail at the front edges and by a flat strip at the rear edges of said plates, which rail and strip ensure the parallel position of the bearing plates, and in that there is secured to the rear end parts of each of said draw rods a vertically downwardly projecting longitudinal mounting plate, which engages between the bearing plates and the bearing plates and the mounting plates are penetrated by a pivot pin in a bore passing through the three plates and by a shearing pin in at least one further bore, which is mounted forwardly of the pivot pin.