Vehicle occupant support
View Patent ↗Arrangements for safety and comfort in vehicles.
1. A latch for securing a structure comprising a plurality of connected occupant support modules to support tracks at a floor of an aircraft having an axis of motion of flight, said latch adapted to moderate forces between said support tracks and said connected occupant support modules utilizing one or both of:
(i) a plurality of load equalizers in contact with a plurality of studs ( 18 - 1012 ) and with a body of the latch ( 18 - 1005 ),
each load equalizer comprising a spring ( 18 - 1017 ) placed between the stud and the latch body to equalize loads among the plurality of studs as the body of the latch distorts under loading,
wherein the load equalizers are configured to compress during impact conditions on the latch; and
(ii) first and second sliding arrangements configured to moderate loads between said support tracks and said connected occupant support modules,
said first sliding arrangement is configured to support and moderate vertical loads between said support tracks and said connected occupant support modules, said first sliding arrangement comprising:
a horizontal slider ( 18 - 1008 ) with a vertical structural member with surfaces configured to support first ends of one or more vertical load limiters, wherein second ends of said vertical load limiters are attached to a vertical slider ( 18 - 1009 ) adapted to connect to said occupant support modules to moderate vertical loads; and
said second sliding arrangement is configured to moderate horizontal loads between said support tracks and said connected occupant supports, said second sliding arrangement comprising:
support surfaces ( 18 - 1013 ) attached to said latch body ( 18 - 1005 ) and configured to support first ends of one or more horizontal load limiters, wherein second ends of said horizontal load limiters are configured to support said occupant support modules to moderate horizontal loads along the axis of motion of flight of the aircraft and between said support tracks and said occupant support modules.
2. The latch as in claim 1 , wherein the plurality of studs are attached to the latch body, wherein said studs are enabled to slide into apertures on the support track and thereafter slide laterally into a retaining groove on the support tracks; and
further comprising plunger pins adapted to be lowered into said apertures in the support tracks, thereby locking a portion of the latch along the support track.
3. The latch as in claim 1 , wherein said second sliding arrangement further comprises a screw thread ( 18 - 1019 ) and nut ( 18 - 1013 ) arrangement to move the support surfaces relative to the latch body.
4. The latch as in claim 1 , wherein said second sliding arrangement comprises a pair of said support surfaces and said one or more horizontal load limiters of the second sliding arrangement comprises a pair of said horizontal load limiters located between said pair of support surfaces with respective first ends adjoining, and wherein said horizontal slider is located between the second ends of the horizontal load limiters and slides on a horizontal guide on the latch body.
5. The latch as in claim 4 , further comprising a mechanism for adjusting the horizontal position of the support surfaces relative to the latch body, the mechanism comprising a pair of nuts threaded on a horizontal threaded guide, wherein the pair of said nuts move in the same direction upon rotation of the threaded horizontal guide resulting in a motion of the horizontal load limiters along the threaded horizontal guide which in turn moves the second ends of said horizontal load limiters to a desired position, said rotation of the threaded horizontal guide actuated by a tool attached to one end of said threaded horizontal guide.
6. The latch as in claim 4 , further comprising:
a pair of piston plates ( 18 - 1025 ) with pistons therein engaging corresponding cylinders on opposing sides of the horizontal slider, wherein said horizontal slider comprises a vent hole ( 18 - 1029 ) between pairs of cylinders ( 18 - 1027 ) on either side of said horizontal slider, and wherein the pair of load limiters engage a surface of the pair of piston plates and therefore indirectly engage the horizontal sliders ( 18 - 1008 ), enabling a movement of the horizontal slider relative to the piston plates with the transfer of fluid between the piston cylinder pairs on either side of the horizontal slider to allow for a motion of the tracks and the latch body attached thereto, relative to the structure as a change in altitude of the aircraft results in pressure changes within the fuselage.
7. The latch as in claim 1 , wherein the first sliding arrangement further comprises a guide rod ( 18 - 1016 ) supporting said one or more vertical load limiters.
8. The latch as in claim 1 , wherein the second sliding arrangement further comprises a piston and cylinder arrangement with one of:
i) a pair of pistons in a pair of cylinders attached back to back with a vent hole therebetween with the piston attached to the latch body and the cylinders attached to an attachment point of said structure; or
ii) a pair of pistons in a pair of cylinders attached back to back with a vent hole therebetween with the piston attached to an attachment point of said structure and the cylinders, wherein the cylinders are attached to the latch body;
wherein cavities between the pistons and cylinders are filled with a fluid that can pass through the vent, and wherein a pressure differential between two piston cylinder cavities drives fluid through the vent limited by the viscosity and compressibility of the fluid, thereby providing a mechanism to move the attachment point of said structure relative to the latch body when there is a slow change in pressure gradient between the piston cylinder cavities, but resist movement of the support structure relative to the latch body when there is a rapid change in pressure gradient between the piston cylinder pairs as under impact conditions.
9. The latch as in claim 8 , wherein the fluid is a compressible fluid, thereby offering load limiting characteristics for the piston cylinder pairs.
10. The latch as in claim 8 , wherein the fluid is not substantially compressible.
11. The latch as in claim 1 , wherein said structure comprises storage spaces adjoining the floor of the aircraft and adjoining the first sliding arrangement of the latch.
12. The latch of claim 1 , wherein said plurality of occupant supports of said structure are arranged along the axis of motion of flight of the aircraft with attachments therebetween, and wherein pairs of said occupant supports with attachments therebetween in said structure are attached to the support tracks at the floor of the aircraft at common support points between said pairs of said occupant supports with said latch, and wherein said vertical load limiters of said latch are housed vertically above the support tracks in spaces between said pairs of said occupant supports in the structure.
13. The latch as in claim 12 , wherein storage spaces located adjoining the floor of the aircraft in spaces between the vertical load limiters of the latches comprise drawers that nest within said storage spaces and are drawn out on slides attached to the structures.