US 11,987,950 B2
Method and apparatus to form rip lines across a sloping surface
David Hall, Brisbane (AU); and Lachlan Yeldham, Brisbane (AU)
Assigned to OPTI-MINEZ PTY LTD., Queensland (AU)
Appl. No. 17/262,601
Filed by OPTI-MINEZ PTY LTD, Brisbane (AU)
PCT Filed Jul. 25, 2019, PCT No. PCT/AU2019/050783
§ 371(c)(1), (2) Date Jan. 22, 2021,
PCT Pub. No. WO2020/019035, PCT Pub. Date Jan. 30, 2020.
Claims priority of application No. 2018902689 (AU), filed on Jul. 25, 2018.
Prior Publication US 2021/0355654 A1, Nov. 18, 2021
Int. Cl. E02F 5/32 (2006.01); E02F 3/76 (2006.01); E02F 3/84 (2006.01); E02F 9/26 (2006.01); A01B 13/16 (2006.01)
CPC E02F 5/32 (2013.01) [E02F 3/7604 (2013.01); E02F 3/84 (2013.01); E02F 3/841 (2013.01); E02F 9/262 (2013.01); A01B 13/16 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An apparatus to form rip lines across a sloping surface, comprising two or more tines spaced apart from each other;
a linkage arrangement to move the tines laterally relative to a forward operational direction of the apparatus; and
a control system to actuate the linkage arrangement in accordance with programmed instructions and position information to form regular rip lines with a predetermined wavelength;
wherein during operation the tines move laterally in a predetermined manner to form waving rip lines across the sloping surface;
wherein a wavelength and an amplitude of the rip lines are determined by the sloping surface and associated topography and the material of the sloping surface.