US 11,754,433 B2
Load sensing system with stabilized fulcrums
Frank S. Hyer, Duxbury, MA (US)
Assigned to Hyer Industries, Inc., Pembroke, MA (US)
Filed by Hyer Industries, Inc., Pembroke, MA (US)
Filed on Sep. 1, 2020, as Appl. No. 17/9,269.
Claims priority of provisional application 62/897,883, filed on Sep. 9, 2019.
Prior Publication US 2021/0072069 A1, Mar. 11, 2021
Int. Cl. G01G 1/24 (2006.01); G01G 3/12 (2006.01)
CPC G01G 1/24 (2013.01) [G01G 3/12 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A load sensing system comprising at least one load sensing assembly for use with a weigh frame, each assembly including:
at least a first lever and a second lever, each lever having a lever longitudinal axis, a lever fulcrum section, a lever load section, and a lever connector section spaced from the lever fulcrum section and the lever load section along the lever longitudinal axis;
for each lever, a flexure plate aligned in parallel with the lever longitudinal axis, the flexure plate having a middle bearing portion and opposing end portions with one of the end portions fixedly attached to its respective lever;
each lever fulcrum section has a lever bearing surface including one of (i) a line-of-contact rounded bearing edge oriented perpendicular to the lever longitudinal axis or (ii) a flat bearing face, the lever bearing surface of each lever touching the middle bearing portion of the flexure plate;
a sensor having a support surface, a force transmission platform, and an output representative of total force applied to the force transmission platform;
at least one force transmission link adapted to connect each lever connector section to the force transmission platform; and
at least one load link adapted to connect the lever load section of each lever to the weigh frame.