Method and device for making a hole in a golf green

A device (30) for making a hole in a golf green (100), the device (30) having a longitudinal direction (L), a radial direction (R) and an angular direction (A), the device (30) comprising

• a cutting cylinder (4) with an axis parallel to the longitudinal direction (L) and an open end being freely movable along the longitudinal direction (L);
• a structure, comprising guide means (1) defining a weight path having a first endpoint and a second endpoint;
• a weight (5), in engagement with said guide means (1) to be guidedly movable along said weight path;
• a weight propulsion device, arranged to propel the weight (5) reciprocally along said weight path between said first endpoint and said second endpoint so that the weight (5) strikes against the cutting cylinder (4) when the weight (5) is at a location along said weight path, in turn urging the cutting cylinder (4) in the longitudinal direction (L);
• and
• a soil expulsion piston (9), movable inside said cutting cylinder (4) along said longitudinal axis;
• a piston driving mechanism, arranged to transfer a force, provided by said weight propulsion device, to the soil expulsion piston (9) to drive the soil expulsion piston (9) in a direction towards said open end of the cutting cylinder (4);
• and
• an expulsion activating mechanism, arranged to switch the piston driving mechanism on and off by engaging and disengaging, respectively, the piston driving mechanism in relation to the weight propulsion device.