IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0026151
(2008-02-05)
|
등록번호 |
US-7600820
(2009-10-28)
|
발명자
/ 주소 |
- Bouche, Timothy J.
- Hornberger, Timothy G.
|
출원인 / 주소 |
- Krueger International, Inc.
|
대리인 / 주소 |
Andrus, Sceales, Starke & Sawall, LLP
|
인용정보 |
피인용 횟수 :
33 인용 특허 :
14 |
초록
▼
A molded chair shell includes a seat portion and a back portion joined at a junction area. A support or reinforcement member is located at the junction area and is formed integrally with the seat portion and the back portion. The reinforcement member includes an internal cavity between the seat port
A molded chair shell includes a seat portion and a back portion joined at a junction area. A support or reinforcement member is located at the junction area and is formed integrally with the seat portion and the back portion. The reinforcement member includes an internal cavity between the seat portion and the back portion that is substantially positioned over the junction area. The cavity is formed by cavity walls, which may form ribs that extend forwardly along the seat portion and upwardly the back portion of the chair shell. The chair shell may be formed in an injection molding process, and the internal cavity may be formed in a gas assist operation carried out during the injection molding process.
대표청구항
▼
We claim: 1. A molded chair shell comprising: a seat portion having laterally spaced side edges and a front area and a rear area, wherein at least the rear area of the seat portion defines an upwardly facing surface; a back portion having laterally spaced side edges and an upper area and a lower ar
We claim: 1. A molded chair shell comprising: a seat portion having laterally spaced side edges and a front area and a rear area, wherein at least the rear area of the seat portion defines an upwardly facing surface; a back portion having laterally spaced side edges and an upper area and a lower area, wherein at least the lower area of the back portion defines a forwardly facing surface; a junction area between the rear area of the seat portion and the lower area of the back portion, wherein the junction area extends across a width of the chair shell between the side edges of the seat and back portions and defines a wall that is formed integrally with and extends between the upwardly facing surface of the seat portion and the forwardly facing surface of the back portion; and a reinforcement member between the seat portion and the back portion, wherein the reinforcement member comprises a pair of cavity side walls and an outer wall, wherein a first one of the cavity side walls extends outwardly from the rear area of the seat portion and a second one of the cavity side walls extends outwardly from the lower area of the back portion, and wherein the outer wall of the reinforcement member is spaced outwardly of the wall of the junction area, wherein the outer wall of the reinforcement member extends between and interconnects the cavity side walls, and wherein the wall of the junction area extends between and interconnects the cavity side walls, wherein the cavity side walls and the outer wall of the reinforcement member, in combination with the wall of the junction area, cooperate to define a hollow internal cavity that is located at the junction area; wherein the rear area of the seat portion, the lower area of the back portion, and the reinforcement member are formed integrally with each other, wherein the integral formation of the outer wall of the reinforcement member and the wall of the junction area cooperate to define an integrally formed double wall construction at the junction area, and wherein the rear area of the seat portion and the lower area of the back portion are configured to define a single wall construction forwardly and above the junction area, respectively, wherein the double wall construction at the junction area and the single wall construction forwardly and above the junction area, respectively, are formed integrally with each other. 2. The molded chair shell according to claim 1, wherein the cavity walls form ribs that are located on the back portion and on the seat portion. 3. The molded chair shell according to claim 2, wherein the ribs comprise a pair of ribs positioned along opposing edges of the back portion, and a pair of ribs positioned along opposing edges of the seat portion. 4. The molded chair shell according to claim 3, wherein each rib defines a distal end, and wherein each rib defines a tapered cross section in a direction from the junction area toward the distal end. 5. The molded chair shell according to claim 1, wherein the cavity walls are U-shaped. 6. The molded chair shell according to claim 5, wherein the shell defines a width at the junction area that is narrower than a width defined by the seat portion and the back portion, wherein the cavity walls extend from the junction area forwardly into the seat portion and upwardly into the back portion. 7. The molded chair shell according to claim 1, wherein the cavity walls form ribs that extend along opposing side edges defined by the seat portion and along opposing side edges defined by the back portion, and wherein the internal cavity extends outwardly from the junction area at least partially into each of the ribs. 8. The molded chair shell according to claim 1, further comprising leg structure attached to the seat portion to form a chair assembly. 9. The chair shell according to claim 8, wherein the chair assembly is stackable with a like chair assembly. 10. A molded chair shell comprising: a seat portion defining laterally spaced side edges and a rear area; a back portion defining laterally spaced side edges and a lower area that is joined to the rear area of the seat portion at a junction area, wherein the junction area extends across a width of the chair shell between the side edges of the seat and back portions and defines a front wall that extends between the rear area of the seat portion and the lower area of the back portion; and a reinforcement area including an internal cavity substantially positioned at the junction area, wherein the reinforcement area is formed by the front wall of the junction area in combination with a series of cavity walls including an outer cavity wall that is spaced rearwardly from the front wall of the junction area, and wherein the reinforcement area further includes at least a pair of ribs that extend from the junction area into at least one of the rear area of the seat portion and the lower area of the back portion, wherein the ribs are spaced apart from each other, and wherein the reinforcement area is configured such that the internal cavity extends at least partially into each of the ribs; wherein the rear area of the seat portion, the lower area of the back portion and the reinforcement area including the ribs and the outer cavity wall are formed integrally with each other. 11. The molded chair shell according to claim 10, wherein the cavity is substantially symmetrical about a center area. 12. The molded chair shell according to claim 10, wherein the reinforcement area includes ribs that extend from the junction area into both the seat portion and the back portion, wherein the ribs are configured to extend along side edges defined by the seat portion and along side edges defined by the back portion. 13. The molded chair shell according to claim 12, wherein each rib defines a tapered cross section in a direction outwardly from the reinforcement area. 14. The molded chair shell according to claim 10, wherein the series of cavity walls includes the outer cavity wall and a pair of cavity side walls that extend between the outer cavity wall and the front wall of the junction area, wherein the reinforcement area includes ribs that extend from the junction area into both the seat portion and the back portion, wherein the ribs are defined at least in part by the cavity side walls and are configured to extend along side edges defined by the seat portion and along side edges defined by the back portion, and wherein the cavity side walls are U-shaped. 15. The molded chair shell according to claim 10, wherein the series of cavity walls defined by the reinforcement area includes a pair of cavity side walls that extend outwardly from the junction area in combination with the outer cavity wall that is spaced rearwardly from the front wall of the junction area, wherein the outer cavity wall extends between and interconnects the pair of cavity side walls. 16. The molded chair shell according to claim 15, wherein each pair of ribs defines a tapered cross section in a direction extending outwardly from the junction area. 17. A molded chair shell comprising: a seat portion having a rear area defining a top surface and a bottom surface; a back portion joined to the seat portion at a junction area, the back portion having a lower area defining a front surface and a rear surface; wherein the junction area includes a front wall that extends between and interconnects the top surface of the rear area of the seat portion and the front surface of the lower area of the back portion; and a reinforcement area positioned at and formed integrally with the junction area, wherein the reinforcement area includes an internal cavity formed by the front wall of the junction area in combination with an outer wall and a pair of side walls extending therebetween, wherein at least one of the side walls comprises a U-shaped wall, wherein a central area of the U-shaped wall at least in part defines the internal cavity and wherein a pair of spaced apart side portions of the U-shaped wall define a pair of ribs, wherein each rib extends along one of a pair of spaced apart side edges defined by at least one of the back portion and the seat portion; wherein the rear area of the seat portion, the lower area of the back portion and the reinforcement area including the ribs and the outer wall are formed integrally with each other. 18. The molded chair shell according to claim 17, wherein the internal cavity extends outwardly from the junction area at least partially into each of the ribs. 19. The molded chair shell according to claim 18, wherein each of the cavity side walls comprises a U-shaped wall, one of which is configured to define ribs that extend along opposing side edges defined by the seat portion and one of which is configured to define ribs that extend along opposing side edges defined by the back portion.
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