A - Human Necessities – 01 – C
Patent
A - Human Necessities
01
C
111/1
A01C 11/02 (2006.01) A01B 13/00 (2006.01) A01B 13/16 (2006.01) A01B 33/02 (2006.01)
Patent
CA 1220982
Abstract A rotation control system for the mattock means (2) of a tuft-building forest mattock, whereby rotation of the mattock means is adapted to be braked or stopped stepwise in a manner that each pick (3) in turn works a whole in the first stage, in the second stage said pick (3) of the mattock means removes surface deposit from between the obtained hole and a tuft to be built, and in the third stage, as mattock means (2) is allowed to rotate freely, pick (3) leaves the loosened earth behind as a tuft. In order to make the sticking angle and depth dictated by the start moment of braking stages readily adjustable according to various qualit- ies of soil, at a certain angle of rotation of said mattock means a first impulse sensor actuates a first delay timer (6), adapted after a settable delay time to turn on a brake (11) for setting out the first stage of mattock means (2). At a certain angle of rotation of said mattock means, a second impulse sensor (5) actuates a second delay timer (7), adapted after a certain delay time to turn on said brake (11) for setting out the second stage of mattock means (2). The duration of the first and second stage, i.e. the braking effect stopping the rotation of mattock means (2), is adapted to be controlled each by its own timer (8 and 9) whose setting time is adjustable.
443242
Ridout & Maybee Llp
Sinkkila Aarre
LandOfFree
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