IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0612257
(2009-11-04)
|
등록번호 |
US-8322787
(2012-12-04)
|
발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
Thorpe North & Western LLP
|
인용정보 |
피인용 횟수 :
10 인용 특허 :
304 |
초록
▼
A clamping joint for a chair includes a joint coupling a front leg and a rear leg to the seat at an overlap with an inner clamp coupled to the seat and an outer clamp coupled to the inner clamp with the front leg and the rear leg clamped between the inner and outer clamps at the overlap. A finger on
A clamping joint for a chair includes a joint coupling a front leg and a rear leg to the seat at an overlap with an inner clamp coupled to the seat and an outer clamp coupled to the inner clamp with the front leg and the rear leg clamped between the inner and outer clamps at the overlap. A finger on one of the inner or outer clamps extends towards the other and disposed between the front and rear legs.
대표청구항
▼
1. A clamping joint device for a chair, the device comprising: a) a front leg and a rear leg coupled to a seat with one of the front or rear legs being outside of another of the front or rear legs with respect to the seat and with one of the front or rear legs overlapping another of the front or rea
1. A clamping joint device for a chair, the device comprising: a) a front leg and a rear leg coupled to a seat with one of the front or rear legs being outside of another of the front or rear legs with respect to the seat and with one of the front or rear legs overlapping another of the front or rear legs at an overlap;b) a joint coupling the legs to the seat including an inner clamp coupled to the seat and an outer clamp coupled to the inner clamp with the front leg and the rear leg clamped between the inner and outer clamps at the overlap;c) wherein the front and rear legs are disposed adjacent one another at the overlap without any intermediate structure between the front and rear legs at the overlap; and d) wherein the inner and outer clamps further comprise: a plurality of intermeshing posts, fingers or both, on both of the inner and outer clamps with the posts, fingers or both of the inner clamp intermeshing with the posts, fingers or both of the outer clamp. 2. A device in accordance with claim 1, further comprising: a) inner and outer overlapping bores formed between the inner and outer clamps and oriented transverse to one another; andb) the front and rear legs disposed in different ones of the inner and outer overlapping bores. 3. A device in accordance with claim 2, wherein the inner and outer bores are formed by channels in the inner and outer clamps; and further comprising ribs extending into the channels causing an interference fit between the ribs and the front and rear legs. 4. A device in accordance with claim 1, wherein the joint is formed by the inner and outer clamps and the front and rear legs; and wherein the joint is substantially solid with substantially no exposed openings. 5. A device in accordance with claim 1, wherein both the inner and outer clamps further comprise: a channel disposed between posts; and wherein the joint further comprises: an inner bore formed between an inner channel in the inner clamp and posts of the outer clamp; andan outer bore formed between an outer channel in the outer clamp and posts of the inner clamp; andthe inner and outer bores oriented transverse to one another and the inner and outer channels oriented transverse to one another and the posts of the outer clamp being offset with respect to the posts of the inner clamp. 6. A device in accordance with claim 1, further comprising: a) a bolt extending through the outer clamp, the front and rear legs, and the inner clamp at the joint. 7. A device in accordance with claim 1, wherein the inner clamp is integrally formed with the seat as a single integral, monolithic member of continuous material. 8. A device in accordance with claim 1, wherein the front and rear legs are clamped independently of one another between the inner and outer clamps so that the front and rear legs have a non-contacting relationship at the joint and between the inner and outer clamps. 9. A device in accordance with claim 1, wherein the joint further comprises: a tab extending from the joint to engage a leg or a frame of a lower stacked chair. 10. A device in accordance with claim 1, wherein the joint further comprises: a dimple formed in the joint to receive a leg of an upper stacked chair. 11. A device in accordance with claim 1, wherein the seat further comprises: a) an annular frame or hoop; andb) a continuous sheet of flexible and elastic woven mesh or patterned open texture plastic held across and substantially covering an opening in the annular frame or hoop. 12. A device in accordance with claim 11, wherein the seat further comprises: a) a rigid seat-support bar laterally traversing the hoop of the seat and having an arcuate shape arcing below the hoop of the seat and into which the sheet of mesh or plastic of the seat is deflectable; andb) a distance from a top of the hoop of the seat to a lowermost top of the seat-support bar being greater than 2 inches. 13. A device in accordance with claim 11, further comprising: a) a backrest having a continuous sheet of flexible and elastic woven mesh or patterned open texture plastic held across and substantially covering an opening in an annular frame or hoop. 14. A device in accordance with claim 1, further comprising: a) a notch disposed on one of the outer clamps on one side of the seat;b) a tab disposed on another of the outer clamps on another side of the seat; andc) the notch capable of receiving a tab of an adjacent chair to gang the chairs together at adjacent joints. 15. A device in accordance with claim 14, further comprising: a pair of different caps each disposed on a different one of the outer clamps, including a notch cap with the notch formed therein and a tab cap with the tab formed therein. 16. A chair, comprising: a) a seat having an all-plastic hoop;b) an inner clamp of a joint on each lateral side of the hoop integrally formed with the hoop as a single integral, monolithic member of continuous plastic material;c) a rigid plastic seat-support bar laterally traversing the hoop of the seat between the inner clamps and having an arcuate shape arcing below the all-plastic hoop of the seat;d) a continuous sheet of flexible and elastic mesh or patterned open texture plastic held across and substantially covering an opening in the all-plastic hoop;e) an inner channel disposed in the inner clamp between inner posts;f) a front leg disposed in each of the inner channels;g) a rear leg disposed on the inner posts and overlapping the front leg;h) an outer clamp of the joint coupled to each of a different one of the inner clamps; andi) an outer channel disposed in the outer clamp between outer posts, the outer channel receiving the rear leg therein, the outer posts receiving the front leg thereon. 17. A chair in accordance with claim 16, further comprising: a finger on one of the inner or outer clamps extending towards another of the inner and outer clamps and disposed between the front and rear legs. 18. A chair in accordance with claim 16, wherein the front and rear legs are clamped independently of one another between the inner and outer clamps so that the front and rear legs have a non-contacting relationship at the joint and between the inner and outer clamps. 19. A chair in accordance with claim 16, wherein joint further comprises: a tab extending from the joint to engage a leg or a frame of a lower stacked chair. 20. A chair in accordance with claim 16, further comprising: a backrest having a continuous sheet of flexible and elastic mesh or patterned open texture plastic held across and substantially covering an opening in an all-plastic backrest hoop; andthe all-plastic hoop of the backrest and the all-plastic hoop of the seat forming the sole structural support between the front and rear legs. 21. A stacking chair, comprising: a) a plurality of stacked chairs, including an upper chair stacked on a lower chair, each chair comprising: i) a seat supported by front and rear legs fixed in a spaced apart relationship from one another, the front and rear legs being inclined outwardly, the rear legs being disposed outside of the front legs with respect to the seat and with the rear legs overlapping the front legs at an overlap;ii) a pair of joints disposed on opposite sides of the seat and coupling the front and rear legs to the seat, each joint including an inner clamp coupled to the seat and an outer clamp coupled to the inner clamp with one of the front legs and one of the rear legs clamped between the inner and outer clamps at the overlap;iii) wherein the front and rear legs are disposed adjacent one another at the overlap without any intermediate structure between the front and rear legs at the overlap; and iv) wherein the inner and outer clamps further comprise: a plurality of intermeshing posts, fingers or both, on both of the inner and outer clamps with the posts, fingers or both of the inner clamp intermeshing with the posts, fingers or both of the outer clamp; andb) a tab extending from the joint of the upper chair and engaging one of the legs or frame of the lower chair. 22. A device in accordance with claim 1, wherein the finger extends laterally across an entire width of the front and rear legs. 23. A device in accordance with claim 1, wherein a finger extends laterally and is disposed longitudinally between the front and rear legs.
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