Consolidated seat back breakover mechanism
Described is a breakover mechanism for a passenger seat that includes a frame member with a rear portion attached to two opposing sides of a seat back of the passenger seat wherein the frame member is at least partially disposed under a seat pan of the passenger seat, at least one moving portion attached to a forward portion of the frame member, a carriage portion fixedly attached to the seat pan; and a single point mechanism attached to the carriage portion. Once a threshold loading condition occurs, the single point mechanism changes states to facilitate movement of the moving portion relative to the carriage portion.
1. A breakover mechanism for a passenger seat comprising:
a frame member with a rear portion attached to two opposing sides of a seat back of the passenger seat wherein the frame member is at least partially disposed under a seat pan of the passenger seat, the frame member comprising a clevis fitting;
at least one moving portion attached to a forward portion of the frame member, the at least one moving portion comprising a lug fitting;
a carriage portion fixedly attached to the seat pan; and
a single point mechanism attached to the carriage portion wherein, once a threshold loading condition occurs, the single point mechanism changes states to facilitate movement of the moving portion relative to the carriage portion, wherein:
the lug fitting of the at least one moving portion engages the clevis fitting of the frame member; and
the lug fitting comprises a spherical bearing for engaging a pin attached to the clevis fitting.
2. The breakover mechanism of claim 1 , wherein the threshold loading condition comprises a crash condition.
3. The breakover mechanism of claim 1 , wherein the single point mechanism comprises a tension pin.
4. The breakover mechanism of claim 3 , wherein the tension pin comprises a first end attached to the carriage portion and a second end attached to the at least one moving portion.
5. The breakover mechanism of claim 3 , wherein the tension pin comprises a notch and the tension pin changes states when the tension pin fails under a tensile load.
6. The breakover mechanism of claim 3 , wherein the at least one moving portion slides in a fore/aft direction of the passenger seat relative to the carriage portion.
7. The breakover mechanism of claim 6 , wherein the carriage portion comprises protrusions that engage corresponding channels of the at least one moving portion such that the protrusions slide through the channels in the fore/aft direction.
8. The breakover mechanism of claim 1 , wherein an engagement between the lug fitting and the clevis fitting comprises a first primary fastener and a second failsafe fastener.
9. A passenger seat comprising:
a seat back comprising an upper portion and a lower portion;
a seat pan; and
a breakover mechanism configured to facilitate rotation of the seat back,
wherein the breakover mechanism comprises:
a frame member with a rear portion attached to two opposing sides of the lower portion of the seat back wherein the frame member is at least partially disposed under the seat pan;
a slide rail attached to a forward portion of the frame member;
a slide carriage fixedly attached to the seat pan; and
a tension pin attached to a rear side of the slide carriage wherein, once a threshold loading condition occurs, the tension pin changes states to facilitate movement of the slide rail relative to the slide carriage,
wherein the tension pin comprises a notch and the tension pin changes states when the tension pin fails under a tensile load.
10. The passenger seat of claim 9 , wherein the tension pin comprises a first end attached to the slide carriage and a second end attached to the slide rail.
11. A breakover mechanism for a passenger seat comprising:
a frame member with a rear portion attached to two opposing sides of a seat back of the passenger seat wherein the frame member is at least partially disposed under a seat pan of the passenger seat, the frame member comprising a clevis fitting;
at least one moving portion attached to a forward portion of the frame member, the at least one moving portion comprising a lug fitting;
a carriage portion fixedly attached to the seat pan; and
a single point mechanism comprising a tension pin wherein the single point mechanism is attached to the carriage portion wherein, once a threshold loading condition occurs, the single point mechanism changes states to facilitate movement of the moving portion relative to the carriage portion, wherein:
the lug fitting of the at least one moving portion engages the clevis fitting of the frame member;
the at least one moving portion slides in a fore/aft direction of the passenger seat relative to the carriage portion; and
the carriage portion comprises protrusions that engage corresponding channels of the at least one moving portion such that the protrusions slide through the channels in the fore/aft direction.
12. The breakover mechanism of claim 11 , wherein the tension pin comprises a first end attached to the carriage portion and a second end attached to the at least one moving portion.
13. The breakover mechanism of claim 11 , wherein the tension pin comprises a notch and the tension pin changes states when the tension pin fails under a tensile load.
14. The breakover mechanism of claim 11 , wherein an engagement between the lug fitting and the clevis fitting comprises a first primary fastener and a second failsafe fastener.
15. A breakover mechanism for a passenger seat comprising:
a frame member with a rear portion attached to two opposing sides of a seat back of the passenger seat wherein the frame member is at least partially disposed under a seat pan of the passenger seat, the frame member comprising a clevis fitting;
at least one moving portion attached to a forward portion of the frame member, the at least one moving portion comprising a lug fitting;
a carriage portion fixedly attached to the seat pan; and
a single point mechanism attached to the carriage portion wherein, once a threshold loading condition occurs, the single point mechanism changes states to facilitate movement of the moving portion relative to the carriage portion, wherein:
the lug fitting of the at least one moving portion engages the clevis fitting of the frame member; and
an engagement between the lug fitting and the clevis fitting comprises a first primary fastener and a second failsafe fastener.
16. The breakover mechanism of claim 15 , wherein the single point mechanism comprises a tension pin.
17. The breakover mechanism of claim 16 , wherein the tension pin comprises a first end attached to the carriage portion and a second end attached to the at least one moving portion.
18. The breakover mechanism of claim 16 , wherein the tension pin comprises a notch and the tension pin changes states when the tension pin fails under a tensile load.
19. The breakover mechanism of claim 16 , wherein the at least one moving portion slides in a fore/aft direction of the passenger seat relative to the carriage portion.
20. The breakover mechanism of claim 19 , wherein the carriage portion comprises protrusions that engage corresponding channels of the at least one moving portion such that the protrusions slide through the channels in the fore/aft direction.