Overload protection for a weigh scale having a flexure beam
First Claim
1. A weigh scale comprising at least one beam, a base, a platform, load transmitting means for deflecting the beam as a function of the load placed on the platform, sensor means on central portions of the beam for providing a signal relating to the amount of deflection, and rigid overload protection means carried by the beam and generally bridging the central portion of the beam adapted to engage the beam when deflected beyond a certain amount to restrict further deflection of the beam to prevent yielding thereof.
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Accused Products
Abstract
A weigh scale includes a flexure beam disposed between a platform and the base. Load transmitting devices operate to deflect the beam as a function of the load placed on the platform. Overload protection is provided for the beam to restrict the amount of beam deflection to maintain it within its elastic limits to thereby prevent yielding of the beam.
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Citations
10 Claims
- 1. A weigh scale comprising at least one beam, a base, a platform, load transmitting means for deflecting the beam as a function of the load placed on the platform, sensor means on central portions of the beam for providing a signal relating to the amount of deflection, and rigid overload protection means carried by the beam and generally bridging the central portion of the beam adapted to engage the beam when deflected beyond a certain amount to restrict further deflection of the beam to prevent yielding thereof.
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9. A weigh scale comprising:
a base, a platform spaced from the base, first and second pivot members disposed between the base and the platform, a beam having a given diameter connnected between the pivot members, load transmitting means for producing moments in the pivot members to deflect the beam as a function of a load applied to the platform, a central portion of the beam having a reduced cross sectional area, sensor means on said central portion of the beam for creating a signal relating to the deflection thereof, a tube having an inner diameter greater than said beam, said tube bridging said central portion of and being stiffer than said beam, said tube having portions adapted to engage the beam when deflected beyond a certain amount to prevent yielding thereof. - View Dependent Claims (10)
Specification