Load indicating member, apparatus and method
First Claim
1. A load indicating assembly, said load indicating assembly comprising:
- a load indicating member further comprising;
a shank, which, when stressed longitudinally, is subject to elastic deformation such that one portion thereof moves relative to another portion thereof;
a first flat surface formed adjacent one longitudinal end of said shank;
an indicator pin having one longitudinal end disposed adjacent said first flat surface and an other longitudinal end disposed remote therefrom, said other longitudinal end being secured to said shank at a location remote from said first flat surface, said pin being unaffected by said elastic deformation of said shank; and
a second flat surface formed at said one longitudinal end of said pin, said second flat surface being substantially coplanar with said first flat surface when said shank is unstressed, said second flat surface providing a reference for measurement of the elongation of said shank; and
a load measuring device further comprising;
adapter means disposed adjacent said first flat surface;
probe means movably interconnected with said adapter means, said probe means being selectively engagable with said second flat surface; and
feet means extending from said adapter means for engagement with said first flat surface, said feet means being disposed in an array about said probe means such as to position said adapter means on said first flat surface in a manner placing said probe means in axial alignment with said pin;
measurement means responsive to the displacement of said probe means relative to said adapter means such that said measurement means provides a measurement of the elongation of said shank relative to said pin when said shank is stressed longitudinally.
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Accused Products
Abstract
A method of measuring the load in a member subjected to longitudinal stress, a load measuring device and a fastener tightening device using the method of measuring, a load indicating member and a load indicating fastener for use in conjunction with the method of measuring, a method of making the load indicating fastener, and a method of tightening the load indicating fastener. A preselected end of a pin is secured to a shank of a load indicating member, such as a load indicating fastener, in a manner such that the pin is unaffected by the elastic deformation of the shank in response to longitudinal stress. Coplanar first and second flat surfaces are formed, respectively, adjacent to the longitudinal ends of the pin and the shank furthest from the preselected end of the pin such as to provide reference surfaces for the measurement of the elongation of the shank in response to longitudinal stress.
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Citations
18 Claims
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1. A load indicating assembly, said load indicating assembly comprising:
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a load indicating member further comprising; a shank, which, when stressed longitudinally, is subject to elastic deformation such that one portion thereof moves relative to another portion thereof; a first flat surface formed adjacent one longitudinal end of said shank; an indicator pin having one longitudinal end disposed adjacent said first flat surface and an other longitudinal end disposed remote therefrom, said other longitudinal end being secured to said shank at a location remote from said first flat surface, said pin being unaffected by said elastic deformation of said shank; and a second flat surface formed at said one longitudinal end of said pin, said second flat surface being substantially coplanar with said first flat surface when said shank is unstressed, said second flat surface providing a reference for measurement of the elongation of said shank; and a load measuring device further comprising; adapter means disposed adjacent said first flat surface; probe means movably interconnected with said adapter means, said probe means being selectively engagable with said second flat surface; and feet means extending from said adapter means for engagement with said first flat surface, said feet means being disposed in an array about said probe means such as to position said adapter means on said first flat surface in a manner placing said probe means in axial alignment with said pin; measurement means responsive to the displacement of said probe means relative to said adapter means such that said measurement means provides a measurement of the elongation of said shank relative to said pin when said shank is stressed longitudinally. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A load measuring device for use in conjunction with a load indicating member having a shank, a first flat surface formed adjacent to one longitudinal end of said shank, a pin secured to said shank at a location remote from said first flat surface, and a second flat surface formed on said pin and disposed coplanar with said first flat surface, said load measuring device comprising:
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adapter means selectively engageable with said first flat surface; probe means movably interconnected with said adapter means, said probe means being selectively engagable with said second flat surface; feet means extending from said adapter means for engagement with said first flat surface, said feet means being disposed in an array about said probe means such as to position said adapter means on said first flat surface in a manner placing said probe means in axial alignment with said pin; and measurement means responsive to the displacement of said probe means relative to said adapter means such that said measurement means provides a measurement of the elongation of said shank relative to said pin when said shank is stressed longitudinally. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A load indicating member comprising:
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a shank, which, when stressed longitudinally, is subject to elastic deformation such that one portion thereof moves relative to another portion thereof; a first flat surface formed adjacent one longitudinal end of said shank; an indicator pin having one longitudinal end disposed adjacent said first flat surface and an other longitudinal end disposed remote therefrom, said other longitudinal end being secured to said shank at a location remote from said first flat surface, said pin being unaffected by said elastic deformation of said shank; a second flat surface formed at said one longitudinal end of said pin, said second flat surface being substantially coplanar with said first flat surface when said shank is unstressed, said second flat surface providing a reference for measurement of the elongation of said shank. a recess formed in said first flat surface; and a flexible member engaging said first flat surface and said second flat surface and extended across said recess, said flexible member being responsive to the elongation of said shank relative to said pin such as to provide an indication of the elongation of said shank.
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Specification