초록 ▼

A dismantleable chair comprising a back member, leg members and a seat member all formed from generally two-dimensionally shaped materials such as plywood, and the like. The back member is somewhat arcuately shaped in both the horizontal and vertical cross-sections to provide superior seating comfor

A dismantleable chair comprising a back member, leg members and a seat member all formed from generally two-dimensionally shaped materials such as plywood, and the like. The back member is somewhat arcuately shaped in both the horizontal and vertical cross-sections to provide superior seating comfort and strength. The arcuate shape also provides for a unique curved compressively pre-loaded joint design among the chair members, which substantially increases the strength and rigidity of the chair. The compressively preloaded joints are protected from bending and rotational loads by their respective positioning, and the presence of other spaced apart joints. The chair can be assembled and disassembled numerous times without loosing strength and rigidity.

대표청구항 ▼

A dismantleable chair comprising a back member, leg members and a seat member all formed from generally two-dimensionally shaped materials such as plywood, and the like. The back member is somewhat arcuately shaped in both the horizontal and vertical cross-sections to provide superior seating comfor

A dismantleable chair comprising a back member, leg members and a seat member all formed from generally two-dimensionally shaped materials such as plywood, and the like. The back member is somewhat arcuately shaped in both the horizontal and vertical cross-sections to provide superior seating comfort and strength. The arcuate shape also provides for a unique curved compressively pre-loaded joint design among the chair members, which substantially increases the strength and rigidity of the chair. The compressively preloaded joints are protected from bending and rotational loads by their respective positioning, and the presence of other spaced apart joints. The chair can be assembled and disassembled numerous times without loosing strength and rigidity. locity and trajectory respectively. 13. The method of claim 1 further comprising reducing movement of the headrest after movement of a predetermined distance and before the headrest contacts the head of the occupant to provide support. 14. A method of providing head support with a movable headrest of a vehicle seat to a vehicle occupant head during impact of the vehicle, the method comprising: moving the headrest toward the head of the occupant along a first trajectory and at a first forward velocity upon impact of the vehicle; moving the headrest toward the head of the occupant along a second trajectory and at a second forward velocity before the head of the occupant contacts the headrest, one of the first trajectory and first forward velocity being different from one of the second trajectory and second forward velocity respectively. 15. The method of claim 14 wherein the first trajectory and first forward velocity are different than the second trajectory and second forward velocity respectively. 16. The method of claim 14 further comprising reducing movement of the headrest after movement of a predetermined distance and before the headrest contacts the head of the occupant to provide support.