METHOD AND APPARATUS FOR DETECTING OVERLOAD DISTORTION
First Claim
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1. A method for detecting overload distortion in lifting and the like gear comprising:
- (i) providing a hook or the like quick-attach device which is susceptible to overload distortion;
(ii) providing said hook or the like quick-attach device with two reference points thereon defining, in the undistorted state of said hook or the like, a reference dimension in a. portion of said hook which is liable to dimensional increase in the case of overload; and
(iii) comparing the dimension of said reference dimension with known data after subjecting said hook or the like to possible overloading, in order to determine whether overload distortion has occurred; and
wherein said step of comparing the dimension of said reference dimension with known data after subjecting said hook or the like to possible overloading is performed by comparing said reference dimension with known data in the form of a standard dimension provided on said hook and conveniently accessible for reference purposes.
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Abstract
Method and apparatus for detecting overload distortion A method and apparatus for detecting overload distortion in lifting and the like gear is disclosed. The apparatus includes a hook with two reference points thereon defining, in the undistorted state of the hook, a reference dimension. The hook also has a standard dimension provided on the hook and conveniently accessible for reference purposes. The standard dimension is also a pair of points and one of this pair is coincident with one of the reference points thereby forming a triangle of points on the hook.
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Citations
10 Claims
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1. A method for detecting overload distortion in lifting and the like gear comprising:
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(i) providing a hook or the like quick-attach device which is susceptible to overload distortion; (ii) providing said hook or the like quick-attach device with two reference points thereon defining, in the undistorted state of said hook or the like, a reference dimension in a. portion of said hook which is liable to dimensional increase in the case of overload; and (iii) comparing the dimension of said reference dimension with known data after subjecting said hook or the like to possible overloading, in order to determine whether overload distortion has occurred; and wherein said step of comparing the dimension of said reference dimension with known data after subjecting said hook or the like to possible overloading is performed by comparing said reference dimension with known data in the form of a standard dimension provided on said hook and conveniently accessible for reference purposes. - View Dependent Claims (2, 3)
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4. A method for detecting overload distortion in lifting and the like gear comprising:
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(i) providing a hook or the like quick-attach device which is susceptible to overload distortion; (ii) providing said hook or the like quick-attach device with three reference points, for example in the form of formations such as inwardly or outwardly-projecting (concave or convex, whether rounded or not) location-defining formations, at locations thereon defining, in the undistorted state of said hook or the like, an isosceles or equilateral triangle; and (iii) comparing the dimensions of two sides of said isosceles or equilateral triangle, one of which includes the dimension of said hook or the like (such as the mouth of the hook) which is the more liable to dimensional increase in the case of overload distortion, after subjecting said hook or the like to possible overloading.
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5. A hook or the like quick-attach device which is susceptible o overload distortion;
- said hook or the like quick-attach device comprising two reference points thereon defining, in the undistorted state of said hook or the like, a reference dimension in a portion of said hook which is liable to dimensional increase in the case of overload;
said reference dimension being comparable with known data after subjecting said hook or the like to possible overloading, in order to determine whether overload distortion has occurred; and
said hook comprising, in addition to said reference points defining said reference dimension, at least one further reference point defining a standard dimension provided on said hook and conveniently accessible for reference purposes, and said step of comparing the dimension of said reference dimension with known data after subjecting said hook or the like to possible overloading is performed by comparing said reference dimension with said standard dimension. - View Dependent Claims (6, 7, 8, 9)
- said hook or the like quick-attach device comprising two reference points thereon defining, in the undistorted state of said hook or the like, a reference dimension in a portion of said hook which is liable to dimensional increase in the case of overload;
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10-12. -12. (canceled)
Specification