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US 10,996,099 B2Granted
Load cell with overload protection
AssigneesMeasurement Specialties (China) Ltd., Measurement Specialties, Inc.
InventorsHai Mei, Qineng Hu
Life of this patent
Estimating the term…
Abstract
A load cell that includes a beam extending from a fixed section to a load section including a deflection section that moves under a load and a central beam section spaced from the deflection section. At least one strain gauge is coupled to the beam for detecting movement of the beam. A stop element including a bearing surface is also provided and coupled to the beam and configured such that the bearing surface does not engage the beam in a first position and engages the beam in a second position.
Claims19
A load cell comprising:
- a beam extending from a fixed section to a load section including a deflection section configured to move under a load and a central beam section spaced from the deflection section;
- at least one strain gauge coupled to the beam for detecting a load on the beam;
- and
- a stop element including a bearing surface coupled to the beam and configured such that the bearing surface does not engage the beam in a first position and engages the beam in a second position based on the load on the beam, wherein in the first position the load on the beam is below a threshold load and in the second position the load on the beam is above the threshold load.
1 more element
A load cell comprising:
- a beam extending from a fixed section to a load section that is configured to receive a load, the beam including a central beam section spaced from the load section to form a channel between the load section and central beam section;
- at least one strain gauge coupled to the beam for detecting a load on the beam;
- and
- an adjustable stop element secured to the central beam section and extending through the channel into the load section, the adjustable stop element configured to engage the load section above a first threshold load in a first direction and engage the load section above a second threshold load in a second direction.
1 more element
A load cell comprising:
- a beam extending from a fixed section to a load section including a deflection section configured to move under a load and a central beam section spaced from the deflection section;
- at least one strain gauge coupled to the beam for detecting a load on the beam;
- and
- a first channel formed between the deflection section and the central beam section;
- wherein the central beam section and deflection section are configured such that when the deflection section is above a threshold load the deflection section moves through the first channel and engages the central beam before the deflection section reaches a yield condition.
2 more elements
Dependencies are inferred from the claim text.