US 11,850,723 B2
Balancer for tools
Fabio Gubellini, Imola (IT); Andrea Lolli, Budrio (IT); and Damiano Bergami, Castel Guelfo di Bologna (IT)
Assigned to TECNA S.P.A., Castel San Pietro Terme (IT)
Appl. No. 17/059,807
Filed by TECNA S.P.A., Castel San Pietro Terme (IT)
PCT Filed May 29, 2018, PCT No. PCT/IT2018/000078
§ 371(c)(1), (2) Date Nov. 30, 2020,
PCT Pub. No. WO2019/229778, PCT Pub. Date Dec. 5, 2019.
Prior Publication US 2021/0205978 A1, Jul. 8, 2021
Int. Cl. B65H 75/48 (2006.01); B25H 1/00 (2006.01)
CPC B25H 1/0028 (2013.01) [B65H 75/483 (2013.01); B65H 75/486 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A balancer for tools comprises a rotary drum configured for winding and unwinding a cable, which is adapted with a free end thereof to support a tool, and a spring, wound around a main rotation axis of said drum, which is adapted to develop an elastic reaction contrasting the unwinding of said cable, further comprising a measurement transducer configured for measuring at least one parameter correlated to the rotation of said drum about said main axis and a respective assembly configured for supplying electric power to said transducer, wherein said transducer is an encoder adapted to measure the rotation or a number of revolutions of said drum about said main axis, further comprising gear means, interposed between said main axis and an input shaft of a converter, for varying the number of revolutions.