Long-duration shock testing machine

Patent metadata

Field	Value
Publication number	US-12292359-B2
Application number	US-202117555609-A
Country	US
Kind code	B2
Filing date	Dec 20, 2021
Priority date	Dec 20, 2020
Publication date	May 6, 2025
Grant date	May 6, 2025

Abstract

A shock testing machine including: a test platform for holding an item to be shock tested; a carriage for carrying the test platform and being movable relative to the test platform in a testing direction, the testing direction being a direction of movement of the carriage; one or more rails movably supporting one of the test platform and the carriage; a stop configured to stop the carriage from moving in the testing direction at a predetermined location while allowing the test platform to continue moving in the testing direction past the predetermined location; and a brake configured to decelerate the test platform after the carriage has been stopped by the stop.

First claim

What is claimed is:

1. A shock testing machine comprising:
a base;
one or more rails supported by the base and extending in a testing direction;
a test platform for holding an item to be shock tested;
a carriage for carrying the test platform and being movable relative to the test platform along the one or more rails in the testing direction, the testing direction being a direction of movement of the carriage along the one or more rails;
a stop fixed to the base at a predetermined location, the stop being configured to directly engage with only the carriage to stop a movement of the carriage in the testing direction at the predetermined location while allowing the test platform to separate from the carriage in the testing direction and continue moving in the testing direction past the predetermined location; and
a brake configured to decelerate the test platform after the test platform has been separated from the carriage by the stop,
wherein the brake comprises one or more elongated members extending from the test platform in a braking direction opposite to the testing direction, the one or more elongated members being engageable with braking material disposed on the carriage such that when the carriage stops moving in the testing direction at the predetermined location and the test platform continues moving in the testing direction past the predetermined location, the at least one elongated member engages with the braking material to decelerate the testing platform.

2. The shock testing machine according to claim 1 , wherein the stop comprises a member fixed at the predetermined location to interfere with a portion of the carriage to stop the carriage at the predetermined location when the carriage impacts the stop.

3. The shock testing machine according to claim 1 , further comprising a liner disposed between the carriage and the test platform such that a first surface of the test platform contacts a second surface of the liner, the second surface of the liner having a lower coefficient of friction than corresponding surfaces of the carriage.

4. The shock testing machine according to claim 1 , wherein the one or more rails having a cross-sectional center on a same plane as a center of mass of the carriage.

5. The shock testing machine according to claim 1 , wherein the test platform is movable within a pocket formed in the carriage.

6. The shock testing machine according to claim 1 , further comprising bearings provided between the one or more rails and the one of the test platform and the carriage.

7. The shock testing machine according to claim 1 , wherein the carriage is supported by the one or more rails.

8. The shock testing machine according to claim 1 , wherein the test platform is supported by the one or more rails.

9. The shock testing machine according to claim 1 , wherein a braking force of the braking material against the one or more elongated members is adjustable to adjust a rate of the deceleration.

10. The shock testing machine according to claim 1 , further comprising means for accelerating the carriage towards the stop.

Assignees

• Omnitek Partners Llc

Inventors

• Fischer Jacques
• Rastegar Jahangir S

Classifications

• G01M3/30

  using progressive displacement of one fluid by another · CPC title

• G01N3/307

  generated by a compressed or tensile-stressed spring; generated by pneumatic or hydraulic means · CPC title

• G01N3/303

  generated only by free-falling weight · CPC title

• G01M7/08 Primary

  Shock-testing · CPC title