EP0099677A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Aircraft seat
Assignee: Westland Group PLC
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Filing: 1983-06-30
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Granted: —
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Expires: 2003-06-30
Abstract
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 an 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.
Inventors
- 👤 Peter William Trickey
- 👤 David Christopher Netherway
- 👤 William Simon Clifford
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 05:30
CPC Classifications
B; B64; B64D; B64D25/00; B64D25/02; B64D25/04
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
59 words
An aircraft seat (11) including a seat bucket (12) having a back-rest portion (13) attached to support means to permit generally vertical movements of the seat, and energy absorber means adapted to support the seat in an operative position, characterised in that the support means comprise an articulated support structure (14) adapted to react vertical, longitudinal and lateral loads.
Claim 2
Dependent Claim
59 words
An aircraft seat (11) including a seat bucket (12) having a back-rest portion (13) attached to support means to permit generally vertical movements of the seat, and energy absorber means adapted to support the seat in an operative position, characterised in that the support means comprise an articulated support structure (14) adapted to react vertical, longitudinal and lateral loads.
Claim 3
Dependent Claim
34 words
A seat as claimed in Claim 1, further characterised in that the articulated support structure comprises two parallel generally vertical guide tubes (15a, 15b) supported at each end by pivotal attachments to aircraft structure.
Claim 4
Dependent Claim
34 words
A seat as claimed in Claim 2, further characterised in that two vertically spaced-apart collars (30, 31) are slidably located on each guide tube and are attached to brackets (28) on the back-rest portion.
Claim 5
Dependent Claim
48 words
A seat as claimed in Claim 3, further characterised in that the collars on a first one of the guide tubes (15a) are attached to the brackets for pivotal movement about a vertical axis and the collars on the second guide tube are rigidly attached to the brackets.
Claim 6
Dependent Claim
44 words
A seat as claimed in any one of Claims 2 to 4 inclusive, further characterised in that a cross brace (24) interconnects the two guide tubes and is attached thereto by universally pivoted joints (25, 26) permitting relative lateral movements of the guide tubes.
Claim 7
Dependent Claim
35 words
A seat as claimed in Claim 5, further characterised in that the cross brace supports the upper end of a generally vertical energy absorber (32) having its lower end pivotally attached to the back-rest portion.
Claim 8
Dependent Claim
129 words
A seat as claimed in any one of Claims 4 to 6 inclusive, further characterised in that the lower ends of the guide tubes are attached to a cabin floor by universally pivoted joints (18), the upper end of said first guide tube (15a) is attached by a universal pivoted joint to one end of a generally horizontal straight link (20) the other end of the straight link being attached to the aircraft structure (19) by a universally pivoted joint, whereas the upper end of the second guide tube (15b) is attached by a universally pivoted joint (23) to the apex of a generally horizontal triangular link (21) and the base of the triangular link is attached to the aircraft structure (19) by laterally spaced-apart universally pivoted joints (22).
Claim 9
Dependent Claim
188 words
An aircraft seat (11) including a seat bucket (12) having a back-rest portion (13) supported by two vertically spaced-apart pairs of collars (30, 31) slidably located around two generally vertical guide tubes (15a, 15b) so as to permit vertical movement of the seat, and an energy absorber (32) adapted to support the seat in an operative position and damp said vertical movement, characterised in that the collars (30) on a first one of said guide tubes (15a) are pivotally attached to the seat so as to react only longitudinal loads and the collars (31) on the second guide tube (15b) are rigidly attached to the seat so as to react both lateral and longitudinal loads, the lower ends of both guide tubes are pivotally attached to aircraft structure (17) so as to react vertical, lateral and longitudinal loads, the upper end of the said first one of the guide tubes is pivotally attached to aircraft structure (19) so as to react only longitudinal loads and the upper end of the second guide tube is pivotally attached to aircraft structure so as to react both lateral and longitudinal loads.
Claim 10
Dependent Claim
188 words
An aircraft seat (11) including a seat bucket (12) having a back-rest portion (13) supported by two vertically spaced-apart pairs of collars (30, 31) slidably located around two generally vertical guide tubes (15a, 15b) so as to permit vertical movement of the seat, and an energy absorber (32) adapted to support the seat in an operative position and damp said vertical movement, characterised in that the collars (30) on a first one of said guide tubes (15a) are pivotally attached to the seat so as to react only longitudinal loads and the collars (31) on the second guide tube (15b) are rigidly attached to the seat so as to react both lateral and longitudinal loads, the lower ends of both guide tubes are pivotally attached to aircraft structure (17) so as to react vertical, lateral and longitudinal loads, the upper end of the said first one of the guide tubes is pivotally attached to aircraft structure (19) so as to react only longitudinal loads and the upper end of the second guide tube is pivotally attached to aircraft structure so as to react both lateral and longitudinal loads.
Claim 11
Dependent Claim
28 words
A seat as claimed in Claim 8, further characterised by a cross brace (24) interconnecting the guide tubes by pivoted attachments (25, 26) adapted to react vertical loads.
Claim 12
Dependent Claim
30 words
A seat as claimed in Claim 9, further characterised in that the pivoted attachments of the cross brace include lateral slots (27a) permitting relative lateral movement of the guide tubes.
Claim 13
Dependent Claim
238 words
An aircraft seat (11) including a seat bucket (12) having a back-rest portion (13) supported by two vertically spaced-apart pairs of collars (30, 31) slidably located around two generally vertical guide tubes (15a, 15b) so as to permit vertical movement of the seat, and an energy absorber (32) adapted to damp vertical movement, characterised in that each of the collars (30) on a first one of said guide tubes (15a) is attached to the seat by a joint (42) pivoted about a vertical axis and each of the collars (31) on the second guide tube (15b) is rigidly attached to the seat, the lower ends of both guide tubes are attached to aircraft structure (17) by universally pivoted joints (18), the upper end of said first one of the guide tubes is attached to one end of a generally horizontal straight link (20) by a universally pivoted joint and the other end of the link is attached to aircraft structure (19) by a universally pivoted joint, the upper end of the second guide tube is attached to the apex of a generally horizontal triangular link (21) by a universally pivoted joint (23) and the base of the triangular link is attached to aircraft structure by laterally spaced-apart universally pivoted joints (22), and a cross brace (24) interconnects the guide tubes and is attached thereto by universally pivoted joints (25, 26) permitting relative lateral movement of the guide tubes.
Claim 14
Dependent Claim
238 words
An aircraft seat (11) including a seat bucket (12) having a back-rest portion (13) supported by two vertically spaced-apart pairs of collars (30, 31) slidably located around two generally vertical guide tubes (15a, 15b) so as to permit vertical movement of the seat, and an energy absorber (32) adapted to damp vertical movement, characterised in that each of the collars (30) on a first one of said guide tubes (15a) is attached to the seat by a joint (42) pivoted about a vertical axis and each of the collars (31) on the second guide tube (15b) is rigidly attached to the seat, the lower ends of both guide tubes are attached to aircraft structure (17) by universally pivoted joints (18), the upper end of said first one of the guide tubes is attached to one end of a generally horizontal straight link (20) by a universally pivoted joint and the other end of the link is attached to aircraft structure (19) by a universally pivoted joint, the upper end of the second guide tube is attached to the apex of a generally horizontal triangular link (21) by a universally pivoted joint (23) and the base of the triangular link is attached to aircraft structure by laterally spaced-apart universally pivoted joints (22), and a cross brace (24) interconnects the guide tubes and is attached thereto by universally pivoted joints (25, 26) permitting relative lateral movement of the guide tubes.
References Cited (Backward Citations)
No citation records indexed.
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