# US 5,349,846 A · Portable leak/flow test equipment for night vision equipment

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 5,349,846 A
- Document ID: US5349846A
- Status: Granted
- Kind: A
- Application number: 08/008,380
- Filed: 1993-01-25
- Granted: 1994-09-27
- Earliest claimed: 1993-01-25
- Assignees: Hughes Aircraft Company
- Inventors: Erasmo Martinez; Steven E. Walmsley
- Web page: https://patentgrep.com/patent/US5349846A

## CPC

- G01M 3/3254: {using a flow detector (G01M3/3245, G01M3/3272 take precedence)}
- G01M 3/02: by using fluid or vacuum
- G01M: TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR

## Abstract

A portable leak detection system. The inventive system (10) includes a portable housing (40). The housing is equipped with a pneumatic circuit including an inlet (12) for receiving fluid from a source and an outlet (36) for communicating the fluid to an external unit under test. A flow meter (30) is disposed within the housing (40) between the inlet (12) and the outlet (36) for measuring the flow of the fluid into the unit under test. A calibration verification mechanism (50) is disposed within the housing (40) for verifying the calibration of the flow meter (30). In a specific implementation, the invention further includes a pressure regulator (22) disposed within the housing (40) between the inlet mechanism (12) and the flow meter (30). In the specific implementation, a first gauge (16) is disposed between the inlet (12) and the pressure regulator (22) for measuring the pressure of the fluid contained in the source and the calibration verification mechanism (50) is an orifice of predetermined diameter in an instrument panel of the housing (40).

## Claims

### Claim 1

A portable leak detection system comprising:
a portable housing;
inlet means disposed within said housing for receiving fluid from a source;
outlet means disposed within said housing for communicating said fluid supplied via said inlet means to an external unit under test;
flow meter means disposed within said housing and connected between said inlet means and said outlet means for measuring the flow of the fluid into said unit under test;
means disposed within said housing for verifying calibration of said flow meter means;
a pressure regulator disposed within said housing and connected between said inlet means and said flow meter means;.
a first gauge disposed within said housing between said inlet and said pressure regulator for measuring the pressure of the fluid contained in said source; and;
a first two-way valve disposed within said housing between said first gauge and said pressure regulator.

### Claim 2 (depends on 1)

The invention of claim 1 wherein said calibration verification means is an orifice of predetermined diameter in an instrument panel of said housing.