# US 4,392,348 A · Device for bleeding motor gases thru motor pole piece

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- Number: US 4,392,348 A
- Document ID: US4392348A
- Status: Granted
- Kind: A
- Application number: 06/290,138
- Filed: 1981-08-05
- Granted: 1983-07-12
- Earliest claimed: 1981-08-05
- Assignees: The United States of America as represented by the Secretary of the Army
- Inventors: Jerry J. Wesson
- Web page: https://patentgrep.com/patent/US4392348A

## CPC

- F42B 10/665: {characterised by using a nozzle provided with at least a deflector mounted within the nozzle}
- F02K 9/80: characterised by thrust or thrust vector control (burning control of solid propellants F02K9/26; feeding control of liquid or gaseous propellants F02K9/56; re-ignitable, restartable or intermittently operated rocket-engine plants F02K9/94)
- F42B: EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION (explosive compositions C06B; fuzes F42C; blasting F42D)
- F02K: JET-PROPULSION PLANTS (features of jet-propulsion plants common to gas-turbine plants, air intakes or fuel supply control of air-breathing jet-propulsion plants F02C7/00, F02C9/00)

## Abstract

A device for bleeding motor gases through the motor pole piece or flange the rocket nozzle flange to reduce the control system weight and complexity and especially for fiber glass wound rocket motor cases.

## Claims

### Claim 1

A rocket motor case having a motor flange connected at one end of the rocket case and said flange having a flat surface means with a multiplicity of passages opening from the interior of said rocket motor case through said flat surface means, a rocket nozzle flange having a flat surface and means securing said rocket nozzle flange flat surface to said motor flange flat surface means, said rocket nozzle flange having a plurality of openings therein that extend from said flat surface outwardly to ducts, said openings in said rocket nozzle flange and said passages in said motor flange being in communication with each other.

### Claim 2 (depends on 1)

A rocket motor as set forth in claim 1, wherein said motor flange has a circumferential groove at said flat surface means and said passages in said motor flange communicating through said groove with said openings of said rocket nozzle.

### Claim 3 (depends on 1)

A rocket motor as set forth in claim 1, wherein said flat surface means of said motor flange and said flat surface on said flange of said rocket nozzle seal relative to each other and each of said passages in said motor flange communicate with one of the openings in said rocket nozzle flange.

### Claim 4 (depends on 3)

A rocket motor as set forth in claim 3, wherein said motor flange and said rocket nozzle flange have telescoping inner surfaces with seal means therebetween.

### Claim 5 (depends on 2)

A rocket motor case as set forth in claim 2, wherein said motor flange and said rocket nozzle flange have inner telescoping surfaces with sealing means sealing therebetween.

### Claim 6 (depends on 1)

A rocket motor case as set forth in claim 1, wherein said motor case is a wound structure of fiber glass material.