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US 9,541,117 B2Granted
Torque-indication crush washer
OwnerManoj Handainventor
Life of this patent
Estimating the term…
Abstract
An apparatus comprises a metal washer having an outer circumference, a plurality of cavities formed within the washer, wherein each cavity has an opening that is flush with the outer circumference, an indicator material comprising an inspection lacquer within at least one of the cavities, and a membrane along the outer circumference sealing the inspection lacquer within the cavity.
Claims15
An apparatus comprising:
- a washer having a top and bottom surface and an outer circumference;
- a cavity formed in the washer;
- an indicator material within the cavity;
- and
- a membrane formed along the outer circumference to enclose the cavity;
- wherein the cavity includes an opening that is located along the outer circumference of the washer.
3 more elements
An apparatus comprising:
- an annulus having an outer diameter, an inner diameter, and a thickness;
- at least one cavity formed within the annulus having an opening flush with the outer diameter of the annulus;
- a membrane along the outer diameter of the annulus, wherein the membrane seals the cavity opening;
- and
- an indicator material within the cavity;
- wherein the indicator material comprises a grease, an oil, an ink, an epoxy, a sealant, a liquid rubber, a glue, a caulking material, a latex, an acrylic, a silicone, a gel, or an inspection lacquer.
3 more elements
An apparatus comprising:
- a metal washer having an outer circumference;
- a plurality of cavities formed within the washer, wherein each cavity has an opening that is flush with the outer circumference;
- an indicator material comprising an inspection lacquer within at least one of the cavities;
- and
- a membrane along the outer circumference sealing the inspection lacquer within the at least one of the cavities.
2 more elements
Dependencies are inferred from the claim text.