Passive head and neck protection pull handle initiation
An ejection system is disclosed herein. The ejection system includes a seat having a seat bucket and a seat back, a passive head and neck protection device coupled to the seat back, and an ejection initiation system. The ejection initiation system includes a pull handle coupled to the seat bucket, a first connector having a first end coupled to the pull handle, an ejection sequence initiation device configured to initiate an ejection sequence, a passive head and neck protection mechanism configured to activate the passive head and neck protection device, and an ejection pull connector having a first end and a second end, the second end coupled to the ejection sequence initiation device and to the passive head and neck protection mechanism.
1 . An ejection system, comprising:
a seat having a seat bucket and a seat back;
a passive head and neck protection device coupled to the seat back; and
an ejection initiation system, including:
a pull handle coupled to the seat bucket;
a first connector having a first end coupled to the pull handle;
an ejection sequence initiation device configured to initiate an ejection sequence;
a passive head and neck protection mechanism configured to activate the passive head and neck protection device; and
an ejection pull connector having a first end and a second end, the second end coupled to the ejection sequence initiation device and to the passive head and neck protection mechanism.
2 . The ejection system of claim 1 , wherein the pull handle is a center pull handle, the ejection initiation system further comprising:
a bell crank coupled to the seat bucket, wherein the second end of the first connector is coupled to the bell crank and the first end of the ejection pull connector is connected to the bell crank.
3 . The ejection system of claim 1 , wherein the ejection sequence initiation device further comprises:
a spring coupled to the ejection pull connector and configured to apply tension to the passive head and neck protection cable, wherein the passive head and neck protection mechanism passing through the spring.
4 . The ejection system of claim 1 , further comprising:
a modular connector coupled to the passive head and neck protection cable at a first end and to the passive head and neck device at a second end, the modular connector including:
a connector body having a first end and a second end, the first end coupled to the passive head and neck protection mechanism;
a passive head and neck protection fitting coupled to second end of the connector body; and
a second cable coupled to the passive head and neck protection fitting at one end and to the passive head and neck protection device at a second end.
5 . The ejection system of claim 4 , wherein the modular connector further comprises:
a removal hole formed in a sidewall of the connector body; and
a cable end coupled to the second end of the passive head and neck protection mechanism, the cable end configured to secure the second end of the passive head and neck protection mechanism to the connector body, the cable end configured to pass through the removal hole to detach the passive head and neck protection mechanism from the modular connector.
6 . The ejection system of claim 5 , wherein the seat back is removably coupled to the seat bucket and the modular connector is configured to disconnect the passive head and neck protection mechanism by passing the cable out through the removal hole.
7 . The ejection system of claim 4 , wherein the connector body and the passive head and neck protection fitting are coupled by complimentary threading.
8 . The ejection system of claim 1 , wherein the ejection initiation system further comprises:
a slotted connector including a slot formed therein, wherein the ejection pull connector is coupled to the slotted connector; and
a fastener to secure the ejection pull connector to the slotted connector, the fastener extending through the slot, wherein the fastener is configured to slide within the slot in response to engaging the pull handle.
9 . The ejection system of claim 1 , wherein the ejection initiation system is configured to activate both the ejection sequence initiation device and the passive head and neck protection device.
10 . The ejection system of claim 1 , wherein the ejection sequence initiation device is a thermal battery.
11 . An ejection seat, comprising:
a seat bucket;
a seat back coupled to the seat bucket;
a passive head and neck protection device coupled to the seat back;
a pull handle coupled to the seat bucket;
a first connector having a first end coupled to the pull handle;
an ejection sequence initiation device configured to initiate an ejection sequence;
a passive head and neck protection mechanism configured to activate the passive head and neck protection device; and
an ejection pull connector having a first end and a second end, the second end coupled to the ejection sequence initiation device and to the passive head and neck protection mechanism.
12 . The ejection seat of claim 11 , wherein the pull handle is a center pull handle, the ejection seat further comprising:
a bell crank coupled to the seat bucket, wherein the second end of the first connector is coupled to the bell crank and the first end of the ejection pull connector is connected to the bell crank.
13 . The ejection seat of claim 11 , further comprising:
a spring coupled to the ejection pull connector and configured to apply tension to the passive head and neck protection mechanism, wherein the passive head and neck protection mechanism passing through the spring.
14 . The ejection seat of claim 11 , further comprising:
a modular connector coupled to the passive head and neck protection mechanism at a first end and to the passive head and neck device at a second end, the modular connector including:
a connector body having a first end and a second end, the first end coupled to the passive head and neck protection mechanism;
a passive head and neck protection fitting coupled to second end of the connector body; and
a second cable coupled to the passive head and neck protection fitting at one end and to the passive head and neck protection device at a second end.
15 . The ejection seat of claim 14 , wherein the modular connector further comprises:
a removal hole formed in a sidewall of the connector body; and
a cable end coupled to the second end of the passive head and neck protection mechanism, the cable end configured to secure the second end of the passive head and neck protection mechanism to the connector body, the cable end configured to pass through the removal hole to detach the passive head and neck protection mechanism from the modular connector.
16 . The ejection seat of claim 15 , wherein the seat back is removably coupled to the seat bucket and the modular connector is configured to disconnect the passive head and neck protection mechanism by passing the passive head and neck mechanism out through the removal hole.
17 . The ejection seat of claim 14 , wherein the connector body and the passive head and neck protection fitting are coupled by complimentary threading.
18 . The ejection seat of claim 11 , further comprising:
a slotted connector including a slot formed therein, wherein the ejection pull connector is coupled to the slotted connector; and
a fastener to secure the ejection pull connector to the slotted connector, the fastener extending through the slot, wherein the fastener is configured to slide within the slot in response to engaging the pull handle.
19 . The ejection seat of claim 11 , wherein the ejection pull connector is configured to activate both the ejection sequence initiation device and the passive head and neck protection device.
20 . A method of initiating an ejection sequence, comprising:
receiving, via a passive head and neck protection mechanism and an ejection sequence initiation device, an ejection sequence initiation signal in response to a pull handle coupled to a seat bucket being pulled, the seat bucket coupled to a seat back and the seat back coupled to a passive head and neck protection device, wherein the pull handle is further coupled to an ejection pull connector that is pulled in response to the pull handle being pulled and initiates the ejection sequence initiation signal;
deploying, via the passive head and neck protection mechanism, a passive head and neck protection device in response to the ejection sequence initiation signal; and
initiating, via the ejection sequence initiation device, the ejection sequence, after deploying the passive head and neck protection device, in response to the ejection sequence initiation signal.