Inert ambient pressure delay

Patent metadata

Field	Value
Publication number	US-2020002012-A1
Application number	US-201816023722-A
Country	US
Kind code	A1
Filing date	Jun 29, 2018
Priority date	Jun 29, 2018
Publication date	Jan 2, 2020
Grant date	—

Abstract

A pressure delay mechanism is disclosed. In various embodiments, the mechanism includes a triggering mechanism operably coupled to an input signal port and to an output signal port and configured to transmit a signal from the input signal port to the output signal port and a differential pressure mechanism operably coupled to an exterior pressure input and to an interior pressure input and configured to lock the triggering mechanism during a first state of pressure difference and to unlock the triggering mechanism during a second state of pressure difference.

First claim

What is claimed is:

1 . A pressure delay mechanism, comprising:
a triggering mechanism operably coupled to an input signal port and to an output signal port and configured to transmit a signal from the input signal port to the output signal port; and a differential pressure mechanism operably coupled to an exterior pressure input and to an interior pressure input and configured to lock the triggering mechanism during a first state of pressure difference and to unlock the triggering mechanism during a second state of pressure difference.

2 . The pressure delay mechanism of claim 1 , wherein the triggering mechanism comprises a bolt slidably disposed within a housing, the bolt having a first end operably coupled to the input signal port and a second end operably coupled to the output signal port.

3 . The pressure delay mechanism of claim 2 , wherein the differential pressure mechanism is configured to lock the bolt from translational movement during the first state of pressure difference and to unlock the bolt from translational movement during the second state of pressure difference.

4 . The pressure delay mechanism of claim 3 , further comprising a firing pin and a biasing member disposed between the second end of the bolt and the firing pin.

5 . The pressure delay mechanism of claim 4 , wherein the first end of the bolt is operably coupled to the input port via an input pyrotechnic pressure donor.

6 . The pressure delay mechanism of claim 5 , wherein the second end of the bolt is operably coupled to the output signal port via an output percussive primer configured for ignition by the firing pin.

7 . The pressure delay mechanism of claim 1 , wherein the differential pressure mechanism comprises a bellows mechanism.

8 . The pressure delay mechanism of claim 7 , wherein the bellows mechanism includes a sliding shaft configured to lock the triggering mechanism during the first state of pressure difference and to unlock the triggering mechanism during the second state of pressure difference.

9 . The pressure delay mechanism of claim 8 , wherein the triggering mechanism comprises a bolt slidably disposed within a housing, the bolt having a first end operably coupled to the input signal port and a second end operably coupled to the output signal port.

10 . The pressure delay mechanism of claim 9 , further comprising a firing pin and a biasing member disposed between the second end of the bolt and the firing pin.

11 . The pressure delay mechanism of claim 10 , wherein the first end of the bolt is operably coupled to the input signal port via an input pyrotechnic pressure donor and wherein the second end of the bolt is operably coupled to the output signal port via an output percussive primer configured for ignition by the firing pin.

12 . A pressure delay mechanism, comprising:
a housing; a bolt slidably disposed within the housing, the bolt having a first end operably coupled to an input signal port and a second end operably coupled to an output signal port; and a differential pressure mechanism operably coupled to an exterior pressure input and to an interior pressure input and configured to lock the bolt during a first state of pressure difference and to unlock the bolt during a second state of pressure difference.

13 . The pressure delay mechanism of claim 12 , wherein the differential pressure mechanism includes a bellows mechanism configured to lock the bolt from translational movement during the first state of pressure difference and to unlock the bolt from translational movement during the second state of pressure difference.

14 . The pressure delay mechanism of claim 13 , further comprising a firing pin and a biasing member disposed between the second end of the bolt and the firing pin.

15 . The pressure delay mechanism of claim 14 , wherein the first end of the bolt is operably coupled to the input signal port via an input pyrotechnic pressure donor and wherein the second end of the bolt is operably coupled to the output signal port via an output percussive primer configured for ignition by the firing pin.

16 . An emergency egress system for an aircraft, comprising:
an ejection seat having an ejection seat handle and an ejection seat catapult; a canopy having a canopy catapult; a pressure equalization port; a pressure delay mechanism, comprising:
a housing;
a bolt slidably disposed within the housing, the bolt having a first end operably coupled to an input signal port and a second end operably coupled to an output signal port; and
a differential pressure mechanism operably coupled to an exterior pressure input and to an interior pressure input and configured to lock the bolt during a first state of pressure difference and to unlock the bolt during a second state of pressure difference;
a first segment of thin layer explosive connecting the ejection seat handle to the input signal port and to the pressure equalization port; a second segment of thin layer explosive connecting the output signal port to the canopy catapult; and a third segment of thin layer explosive connecting the canopy catapult to the ejection seat catapult.

17 . The emergency egress system of claim 16 , further comprising a firing pin and a biasing member disposed between the second end of the bolt and the firing pin.

18 . The emergency egress system of claim 17 , wherein the first end of the bolt is operably coupled to the input signal port via an input pyrotechnic pressure donor and wherein the second end of the bolt is operably coupled to the output signal port via an output percussive primer configured for ignition by the firing pin.

19 . The emergency egress system of claim 16 , wherein the differential pressure mechanism comprises a bellows mechanism.

20 . The emergency egress system of claim 19 , wherein the bellows mechanism includes a sliding shaft configured to lock the bolt during the first state of pressure difference and to unlock the bolt during the second state of pressure difference.

Assignees

• Goodrich Corp

Inventors

• Ramirez German
• Carver Patrick

Classifications

• B64D25/10 Primary

  Ejector seats · CPC title

• F42B1/02

  Shaped or hollow charges (blasting cartridges with cavities in the charge F42B3/08; oil winning using shaped-charge perforators E21B43/116) · CPC title

• F42D1/043

  Connectors for detonating cords and ignition tubes, e.g. Nonel tubes (mounting of detonators in blasting cartridges F42B3/26) · CPC title