Apparatus and methods for testing components under force

Patent metadata

Field	Value
Publication number	US-10620098-B2
Application number	US-201715646367-A
Country	US
Kind code	B2
Filing date	Jul 11, 2017
Priority date	Jul 11, 2017
Publication date	Apr 14, 2020
Grant date	Apr 14, 2020

Abstract

An apparatus and methods for testing components under force is described herein. The apparatus comprises cap bolts that may be tightened to exert a measurable, constant force upon a lever arm that rotates about a fulcrum. The lever arm pushes down upon a push rod, to exert a force upon a test piece in an insertion well, which may be filled with fluid. The fulcrum may be positioned, such that the force from the cap bolt gives a magnifying, or a diluting force, upon the push rod.

First claim

What is claimed is:

1. A test fixture apparatus comprising:
a fulcrum;
a lever arm having a first part and a second part;
an adjustable force delivery tool, positioned to deliver force against the first part of the lever arm;
a push rod having a first end and a second end, positioned to receive a force at the first end, that is delivered from the second part of the lever arm;
an insertion well located below at least a portion of the push rod;
wherein the fulcrum is located in between the first part of the lever arm and the second part of the lever arm,
wherein the lever arm turns about the fulcrum and
where the insertion well comprises a liquid.

2. The test fixture apparatus of claim 1 , further comprising one or more additional lever arms to form a plurality of lever arms, and wherein the fulcrum is a bar, about which the plurality of lever arms rotate.

3. The test fixture apparatus of claim 1 , wherein the adjustable force delivery tool is a bolt.

4. The test fixture apparatus of claim 3 , wherein the bolt is threaded.

5. The test fixture apparatus of claim 1 , wherein the second end of the push rod is inserted into a test piece.

6. The test fixture apparatus of claim 1 , wherein the second end of the push rod is inserted into a test piece located inside the insertion well.

7. The test fixture apparatus of claim 1 , wherein the fulcrum is closer to the adjustable force delivery tool than it is to the push rod.

8. The test fixture apparatus of claim 1 , wherein the fulcrum is farther away from the adjustable force delivery tool than it is from the push rod.

9. The test fixture apparatus of claim 1 , further comprising a removable part holder.

10. The test fixture apparatus of claim 9 , wherein the removable part holder comprises an insertion well located below at least a portion of the push rod.

Assignees

• Covestro Llc

Inventors

• Yeager Mark A

Classifications

• G01N17/002

  Test chambers · CPC title

• G01N2203/0274

  Tubular or ring-shaped specimens · CPC title

• G01N3/02 Primary

  Details · CPC title

• G01M99/007 Primary

  by applying a load, e.g. for resistance or wear testing (G01M99/001 takes precedence; testing the elasticity of structures G01M5/00) · CPC title

• G01N3/567

  by submitting the specimen to the action of a fluid or of a fluidised material, e.g. cavitation, jet abrasion (G01N3/565 takes precedence) · CPC title