Various embodiments of seat harness pretensioning devices for use in land, air, and sea vehicles are described herein. In one embodiment, a seat unit for use in a military land vehicle or helicopter includes a stroking device that enables the seat to move downwardly in response to sudden movement. T
Various embodiments of seat harness pretensioning devices for use in land, air, and sea vehicles are described herein. In one embodiment, a seat unit for use in a military land vehicle or helicopter includes a stroking device that enables the seat to move downwardly in response to sudden movement. The seat unit also includes a seat belt or harness that extends around the occupant in the seat. Sudden movement of the seat in response to an explosion or hard landing causes a tensioning system to automatically pretension the seat harness.
대표청구항▼
1. A seat assembly, comprising: a seat movably mounted to a vehicle;a harness attached to the seat;a slidable member movably mounted to the seat, wherein the slidable member includes an opening, and wherein a portion of the harness movably extends through the opening; anda coupler mounted to the sea
1. A seat assembly, comprising: a seat movably mounted to a vehicle;a harness attached to the seat;a slidable member movably mounted to the seat, wherein the slidable member includes an opening, and wherein a portion of the harness movably extends through the opening; anda coupler mounted to the seat, wherein the coupler translates movement of the seat relative to the vehicle into movement of the slidable member relative to the seat, and wherein the movement of the slidable member increases the tension of the harness. 2. The seat assembly of claim 1, further comprising a first fixed member and a second fixed member, wherein the first fixed member is mounted to the second first member, wherein the second fixed member is mounted to the seat, and wherein the slidable member is movably mounted between the first fixed member and the second fixed member. 3. The seat assembly of claim 2 wherein the slidable member includes a row of teeth, wherein the seat assembly further comprises a ratchet positioned to engage the teeth, wherein the movement of the slidable member relative to the seat is in a first direction, and wherein the ratchet maintains tension in the harness by preventing movement of the slidable member relative to the seat in a second direction opposite to the first direction. 4. The seat assembly of claim 1, further comprising a fixed member mounted to the seat, wherein the slidable member is movably mounted between the seat and the fixed member, and wherein the movement of the slidable member relative to the seat pulls a portion of the harness between the fixed member and the seat. 5. The seat assembly of claim 1, further comprising a load limiter positioned to limit movement of the slidable member relative to the seat to limit an amount of tension in the harness. 6. The seat assembly of claim 1 wherein the movement of the slidable member relative to the seat is in a first direction, the seat assembly further comprising a ratchet system positioned to prevent movement of the slidable member in a second direction opposite to the first direction. 7. The seat assembly of claim 1, further comprising a fixed member mounted to the seat, wherein the slidable member is movably mounted between the seat and the fixed member, wherein the harness is attached to an anchor point on the fixed member, and wherein the harness extends from the anchor point and through the opening in the slidable member. 8. The seat assembly of claim 1 wherein the coupler comprises a lever having a first end portion operably coupled to a fixed portion of the vehicle and a second end portion operably coupled to the slidable member, wherein the movement of the seat relative to the vehicle rotates the lever and moves the slidable member relative to the seat. 9. A seat assembly, comprising: a seat movably mounted to a vehicle;a fixed member mounted to the seat and spaced apart from the seat to form a slot therebetween;a harness having an end portion attached to the fixed member;a slidable member movably positioned in the slot between the seat and the fixed member, wherein the slidable member includes an opening, and wherein a portion of the harness extends through the opening; anda lever pivotally mounted to the fixed member and positioned to interact with a fixed portion of the vehicle upon downward movement of the seat, wherein interaction rotates the lever against the slidable member thereby moving the slidable member downward and drawing a portion of the harness into the slot to tension the harness. 10. The seat assembly of claim 9 wherein the opening is a first opening, wherein the fixed member includes a second opening, and wherein the lever extends through the second opening to engage the slidable member. 11. The seat assembly of claim 9, further comprising a ratchet positioned to prevent upward motion of the slidable member. 12. The seat assembly of claim 11 wherein the slidable member includes a plurality of teeth positioned to engage the ratchet. 13. The seat assembly of claim 9 wherein the fixed member is a first fixed member, wherein the seat harness pretensioner further comprises a second fixed member mounted to the seat, wherein the first fixed member is mounted to the seat via the second fixed member, and wherein the slot is positioned between the first fixed member and the second fixed member. 14. The seat assembly of claim 9, further comprising a stroking mechanism, and wherein the seat is movably mounted to the vehicle via the stroking mechanism.
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이 특허에 인용된 특허 (392)
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