Apparatus and method for snow grooming a terrain park or ski area slopes

A method of creating a groomed terrain of snow, comprising the steps of:

• moving a grooming vehicle over a terrain;
• rotating a plurality of non-coupled rotary tiller units independently mounted on a main frame of said vehicle in a pivotal movement relative to an axis that is at an angle to a plane defined by said main frame;
• and
• independently adjusting and positioning said grooming tillers relative to said main frame to create a predetermined terrain contour.

A vehicle for grooming snow, comprising:

• a rectangular main frame, defining a plane in relation to a terrain upon which said vehicle moves;
• a plurality of hydraulically driven, non-coupled rotary tiller units, at least one of said tiller units independently overhead-mounted on said main frame for pivotal movement relative to an axis that is at an angle to said plane defined by said main frame;
• and
• a plurality of bogey track units upon which said vehicle moves, wherein at least one of said plurality of bogey track unit is mounted to a corner of said main frame in an angularly adjustable manner relative to said main frame and a second bogey track unit is mounted to an opposite corner of said main frame in an angularly adjustable manner relative to said main frame, the relative angular position of said second bogey track unit being independent of the angular position of said at least one bogey track unit on the opposite corner;
• wherein at least one of said plurality of bogey track units pivots around a nearest corner of said main frame into an alignment that allows to move said vehicle with a narrow side of said main frame facing the direction of travel.