Chairs and seats – Crash seat – Bottom and back movable as unit in response to force
Patent
1983-07-07
1985-06-25
Kannan, Philip C.
Chairs and seats
Crash seat
Bottom and back movable as unit in response to force
244122R, 297308, B60R 2110
Patent
active
045250103
ABSTRACT:
An aircraft seat (11) particularly adapted as a pilot seat for a helicopter includes a seat bucket (12) having a back-rest portion (13) supported by an articulated support structure (14) adapted to react vertical, longitudinal and lateral loads and to permit normal vertical stroking of the seat by extension of any energy absorber (32) in the event that the support structure becomes mis-aligned in a hard landing. The structure comprises two parallel generally vertical guide tubes (15a, 15b). The lower ends of both guide tubes are attached to a cabin floor (17) by universally pivoted joints (18), the upper end of a first one of the guide tubes (15a) is pivotally attached to one end of a generally horizontal straight link (20) to react longitudinal loads only and the upper end of the second guide tube (15b) is pivotally attached at the apex of a generally horizontal triangular link (21) so as to react both lateral and longitudinal loads. A pair of spaced-apart collars (30, 31) are slidably mounted on each guide tube and are attached to the seat bucket in a load reacting manner that is compatible with the attachment of the respective guide tubes.
REFERENCES:
patent: 2971566 (1961-02-01), Negroni
patent: 3532379 (1970-10-01), Reilly et al.
patent: 3985388 (1976-10-01), Hogan
patent: 4408738 (1983-10-01), Mazelsky
patent: 4423848 (1984-01-01), Mazelsky
Clifford William S.
Netherway David C.
Trickey Peter W.
Kannan Philip C.
Westland plc
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