Load cell for an electrical weighing scale
AssigneeMeasurement Specialties, Inc.
InventorsSteven P. Petrucelli, Damon Germanton
Life of this patent
Estimating the term…
Abstract
A load cell for an electronic scale, which is capable of providing both load support and load measurement in a planar member. This is accomplished by configuring the load cell as a substantially flat circular plate having an E-shaped deflectable member defined therein. The E-shaped member includes three beams, at least one of which includes a sensor arrangement that responds to a load applied to the deflectable member by generating an electrical signal that is indicative of the load applied to the E-shaped member.
Claims14
A load cell for an electronic scale, comprising:
- a substantially flat plate having at least one C-shaped aperture, said at least one C-shaped aperture defining a substantially E-shaped deflectable member having three beams which form the arms of said substantially E-shaped deflectable member;
- and
- sensor means disposed on at least one of said three beams, for generating an electrical signal in response to an applied load to said E-shaped deflectable member of said load cell, said electrical signal being indicative of the applied load;
- wherein two of said beams each include a conical-shaped projection which concentrates said applied load to said E-shaped deflectable member.
An electronic scale for displaying the weight of a load applied to said scale, comprising:
- a platform;
- a plurality of support members attached to said platform for elevating said platform above a supporting surface, each of said support members supporting a portion of the load, wherein each of said support members includes a load cell having a substantially flat plate including at least one C-shaped aperture, said at least one C-shaped aperture defining a substantially E-shaped deflectable member having three beams which form the arms of said substantially E-shaped deflectable member, and sensor means disposed on at least one of said three beams, for generating an electrical signal in response to a load applied to said E-shaped deflectable member of said load cell, said electrical signal being indicative of the load;
- and
- display means for receiving said electrical signals generated by said load cells in each of said support members and displaying the weight of the applied load;
- wherein two of said beams each include a conical-shaped projection which concentrates said applied load to said E-shaped deflectable member.
A load cell for an electronic scale, comprising:
- a substantially flat plate having a first C-shaped aperture and a second oppositely faced C-shaped aperture substantially surrounding said first aperture, said first C-shaped aperture defined by first and second portions of uniform width in parallel alignment along their entire length and a third portion perpendicular to said first and second portions and coupled at a first end to said first portion and at a second end to said second portion, said second C-shaped aperture defined by first and second portions of uniform width in parallel alignment along their entire length and a third portion perpendicular to said first and second portions and coupled at a first end to said first portion and at a second end to said second portion, defining an E-shaped deflectable member having three beams which form the arms of said E-shaped deflectable member, said three beams comprising two outer beams, each beam having a top surface of uniform width extending the entire length of said first and second portions of said first C-shaped aperture, and an inner beam, wherein said inner beam includes a conical shaped projection formed on a top surface of said inner beam which concentrates an applied load to said E-shaped deflectable member;
- and
- sensor means disposed on said two outer beams for generating an electrical signal in response to a load applied to said E-shaped deflectable member of said load cell, said electrical signal being indicative of the applied load.
Dependencies are inferred from the claim text.