US 12,453,313 B2
Adjustable grain screen and methods for using the same
Gerhard Dowich, Erval Seco (BR)
Assigned to Marta Lindenmayr Döwich, Cascavel (BR)
Appl. No. 17/765,209
Filed by Marta Lindenmayr Döwich, Cascavel (BR)
PCT Filed Sep. 30, 2020, PCT No. PCT/BR2020/050389
§ 371(c)(1), (2) Date Aug. 11, 2022,
PCT Pub. No. WO2021/062505, PCT Pub. Date Apr. 8, 2021.
Claims priority of application No. 102019020537-7 (BR), filed on Sep. 30, 2019.
Prior Publication US 2022/0369563 A1, Nov. 24, 2022
Int. Cl. A01F 12/44 (2006.01)
CPC A01F 12/448 (2013.01) 3 Claims
OG exemplary drawing
 
1. An adjustable grain screen comprising:
partitions fixed at the ends between the sides of the screen structure and a mechanism for adjusting scales in said screen structure further comprising shafts rotating in orifices positioned at said sides of said screen structure, said scales being fixed on said shafts by way of channels, and after the orifices of said side of the screen said shafts have an S-shaped bend for introduction into said orifices of a ruler positioned on the outer face of the side of said screen, in whose orifices the bent ends of said shafts of said scales are mounted,
said adjustable grain screen further comprising at one of the ends of the screen structure an orifice where a spindle with an eyelet is mounted for commanding its rotary movement, an elastic part flanked by protective elements being mounted on said spindle by the opposite side of the end of the structure of the screen, followed by a nut and said spindle having a second nut on which said ruler is fastened.