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US 12,411,067 B2Granted
Torque and combined load fixture and test method
AssigneeStress Engineering Services, Inc.
InventorsMatthew Sanders, Jack E. Miller
Life of this patent
Estimating the term…
Abstract
A method and apparatus for testing a specimen with pressure, applying a torque using one or more plates coupled to the test specimen, applying a bending moment, and/or applying an axial load, either separately or simultaneously, with or without rotating the specimen, and without the applied forces interfering with each other.
Claims13
An apparatus for testing a specimen comprising:
- a tubular housing with a first end and a second end;
- a first end assembly, coupled to a first end of a tubular, further comprising a first cylindrical body having a plurality of recessed, axially oriented cylindrical half grooves located radially outward;
- a second cylindrical body having a plurality of evenly spaced, recessed, axially oriented cylindrical half grooves located radially inward, wherein the first cylindrical body is disposed within, and axially aligned with, the second cylindrical body with the grooves of both cylindrical bodies align with, and complement each other to form a first plurality of cylindrical cavities within the assembly;
- a sphere located within each of the first plurality of cylindrical cavities, forming a plurality of spheres, where the sphere can move during axial movement of the first cylindrical body relative to the second cylindrical body, and transmits a torque about the axis resulting from rotational movement of the first cylindrical body relative to the second cylindrical body;
- a second end assembly, coupled to a second end of the tubular, further comprising a third cylindrical body having a plurality of recessed, axially oriented cylindrical half grooves located radially outward;
- a fourth cylindrical body having a plurality of evenly spaced, recessed, axially oriented cylindrical half grooves located radially inward, wherein the third cylindrical body is disposed within, and axially aligned with, the fourth cylindrical body with the grooves of both cylindrical bodies align with, and complement each other to form a second plurality of cylindrical cavities within the assembly;
- a sphere located within each of the second plurality of cylindrical cavities, forming a plurality of spheres, where the sphere can move during axial torque of the third cylindrical body relative to the fourth cylindrical body, and transmits a movement about the axis resulting from rotational movement of the third cylindrical body relative to the fourth cylindrical body;
- a first plate axial aligned with and fixed to the second end assembly;
- and
- a second plate axially aligned with and rotatingly coupled to the second end assembly, wherein the second plate can rotate independently of the first plate.
7 more elements
Dependencies are inferred from the claim text.