Portable, collapsible multi-purpose chair

Claim 2

A portable chair comprising: a quadrilateral seat having rigid peripheral front, side and rear frame elements; a pair of arm rests, each arm rest having a depending U-shaped frame structure having a horizontal base portion; means for horizontally pivotally securing said horizontal base portion of said U-shaped frame respectively to said side frame elements for movement between collapsed positions adjacent said seat and elevated positions respectively above each said side element of said seat; a back rest having a back engaging element mounted on a rigid frame structure including a rigid bottom element; means for horizontally pivotally securing said rigid bottom element of said back rest to said rear frame element of said seat for movement of said back rest between a collapsed horizontal position adjacent said seat and an upwardly and rearwardly inclined position relative to said seat; a horizontal support rod secured to each side frame element of said seat in spaced, parallel relationship; a pair of leg frames; tubular means on the top of each said leg frame for pivotally engaging said support rod for movement of each leg frame between a collapsed position underlying said seat to a substantially vertical position to vertically support said seat thereon; and manually releasable means for securing each said tubular means against movement relative to the respective support rod in said substantially vertical position.

Claim 3

The apparatus of claim 1 wherein said manually releasable means comprises a spring pressed detent.

Claim 4

The apparatus of claim 1 wherein said horizontal base portion of said U-shaped frame of each said arm rest is semi-tubular, and said means for respectively pivotally securing said base portion to said seat side frame comprises a telescopic engagement of said semi-tubular base portion with said respective tubular means on said leg frame; said semi-tubular horizontal base portion having a bore diameter slightly greater than said leg frame tubular means and further having an elongated slot of slightly less than 180° arcuate width, thereby permitting each said semi-tubular base portion to be snapped around the respective leg frame tubular means.

Claim 5

The apparatus of claim 1 wherein said rigid bottom element of said back rest comprises: a semi-tubular member, and said means for horizontally pivotally securing said semi-tubular member to said rear frame element of said seat comprises a support rod secured to said rear frame element in laterally spaced, parallel relationship thereto; said semi-tubular member having a bore diameter slightly larger than said support rod; and said semi-tubular member further having an elongated slot of slightly less than 180° in arcuate extent to permit said semi-tubular member to be snapped around said support rod.

Claim 6

The apparatus of claim 1 wherein said tubular means comprises: a semi-tubular member having a bore diameter slightly larger than said support rod; and said semi-tubular member further having an elongated slot of slightly less than 180° in arcuate extent to permit said semi-tubular member to be snapped around said support rod.

Claim 7

The apparatus of claim 1 further comprising means depending from said seat frame for clamping said seat to a bench seat.

Claim 8

The apparatus of claim 1 further comprising at least one tip over prevention bar shiftably mounted on said seat frame for movement to a rearwardly projecting position, thereby permitting use of said chair as a beach chair.

Claim 9

The apparatus of claim 1 further comprising means depending from said seat frame for clamping said chair to a bench seat.

Claim 10

A foldable, portable chair comprising: a generally quadrilateral seat having peripherally disposed, rigidly interconnected, horizontal front, rear and two side frame elements; a back support having a rigid bottom frame member; means for pivotally securing said rigid bottom member to said rear frame element of said seat for pivotal movement in a vertical plane relative to said seat from a substantially horizontal position overlying said seat to a vertically inclined position; a pair of identical arm rest, each arm rest having a rigid bottom frame element; means for respectively pivotally securing said rigid bottom frame elements of said arm rests to said side frame elements of said seat for movement in a vertical plane from a substantially horizontal position overlying said seat to a substantially vertical position; a pair of identical leg frames, each having a pair of legs connected in depending relation to a rigid top frame element; means for respectively securing said rigid top frame elements of said leg frames to said side frame elements of said seat for movement in a vertical plane from a horizontal position underlying said seat to a substantially vertical depending position relative to said seat, thereby supporting said seat in an elevated position relative to a floor; said back support, said arm rests and said leg frames being concurrently foldable into their respective overlying and underlying positions relative to said seat to form a compact box-like unit for transport; and depending from said seat frame for clamping said seat to a bench seat.

Claim 11

A foldable, portable chair comprising: a generally quadrilateral seat having peripherally disposed, rigidly interconnected, horizontal front, rear and two side frame elements; a back support having a rigid bottom frame member; means for pivotally securing said rigid bottom member to said rear frame element of said seat for pivotal movement in a vertical plane relative to said seat from a substantially horizontal position overlying said seat to a vertically inclined position; a pair of identical arm rest, each arm rest having a rigid bottom frame element; means for respectively pivotally securing said rigid bottom frame elements of said arm rests to said side frame elements of said seat for movement in a vertical plane from a substantially horizontal position overlying said seat to a substantially vertical position; a pair of identical leg frames, each having a pair of legs connected in depending relation to a rigid top frame element; means for respectively securing said rigid top frame elements of said leg frames to said side frame elements of said seat for movement in a vertical plane from a horizontal position underlying said seat to a substantially vertical depending position relative to said seat, thereby supporting said seat in an elevated position relative to a floor; said back support, said arm rests and said leg frames being concurrently foldable into their respective overlying and underlying positions relative to said seat to form a compact box-like unit for transport; and depending from said seat frame for clamping said seat to a bench seat.

Claim 12

A foldable, portable chair comprising: a generally quadrilateral seat having peripherally disposed, rigidly interconnected, horizontal front, rear and two side frame elements; a back support having a rigid bottom frame member; means for pivotally securing said rigid bottom member to said rear frame element of said seat for pivotal movement in a vertical plane relative to said seat from a substantially horizontal position overlying said seat to a vertically inclined position; a pair of identical arm rests, each arm rest having a rigid bottom frame element; means for respectively pivotally securing said rigid bottom frame elements of said arm rests to said side frame elements of said seat for movement in a vertical plane from a substantially horizontal position overlying said seat to a substantially vertical position; a pair of identical leg frames, each having a pair of legs connected in depending relation to a rigid top frame element; means for respectively pivotally securing said rigid top frame elements of said leg frames to said side frame elements of said seat for movement in a vertical plane from a horizontal position underlying said seat to a substantially vertical depending position relative to said seat, thereby supporting said seat in an elevated position relative to a floor; said back support, said arm rests and said leg frames being concurrently foldable into their respective overlying and underlying positions relative to said seat to from a compact unit for transport; and a tip over prevention bar shiftable mounted within said seat frame for movement to a rearwardly projection position, thereby permitting use of said chair as a beach chair with said leg frames pivoted to said underlying position relative to said seat.

Claim 13

A foldable, portable chair comprising: a generally quadrilateral seat having peripherally disposed, rigidly interconnected, horizontal front, rear and two side frame elements; a back support having a rigid bottom frame member; means for pivotally securing said rigid bottom member to said rear frame element of said seat for pivotal movement in a vertical plane relative to said seat from a substantially horizontal position overlying said seat to a vertically inclined position; a pair of identical arm rests, each arm rest having a rigid bottom frame element; means for respectively pivotally securing said rigid bottom frame elements of said arm rests to said side frame elements of said seat for movement in a vertical plane from a substantially horizontal position overlying said seat to a substantially vertical position; a pair of identical leg frames, each having a pair of legs connected in depending relation to a rigid top frame element; means for respectively pivotally securing said rigid top frame elements of said leg frames to said side frame elements of said seat for movement in a vertical plane from a horizontal position underlying said seat to a substantially vertical depending position relative to said seat, thereby supporting said seat in an elevated position relative to a floor; said back support, said arm rests and said leg frames being concurrently foldable into their respective overlying and underlying positions relative to said seat to from a compact unit for transport; and a tip over prevention bar shiftable mounted within said seat frame for movement to a rearwardly projection position, thereby permitting use of said chair as a beach chair with said leg frames pivoted to said underlying position relative to said seat.

Claim 14

A portable chair comprising: a quadrilateral seat having rigid peripheral front, side and rear frame elements; a backrest having a back engaging element mounted on a rigid frame structure including a rigid bottom element; means for horizontally pivotally securing said rigid bottom element of said backrest to said rear frame element of said seat for movement of said backrest between a collapsed horizontal position adjacent said seat and an upwardly and rearwardly inclined position relative to said seat; a horizontal support rod secured to each side frame element of said seat in spaced, parallel relation thereto; a pair of leg frames; tubular means on the top of each said leg frame for pivotally engaging said support rod for movement of the leg frame between a collapsed position underlying said seat to a substantially vertical position to vertically support said seat thereon; and manually releasable means for securing each said tubular means against movement relative to the respective support rod in said substantially vertical position.

Claim 15

A portable chair comprising: a quadrilateral seat having rigid peripheral front, side and rear frame elements; a backrest having a back engaging element mounted on a rigid frame structure including a rigid bottom element; means for horizontally pivotally securing said rigid bottom element of said backrest to said rear frame element of said seat for movement of said backrest between a collapsed horizontal position adjacent said seat and an upwardly and rearwardly inclined position relative to said seat; a horizontal support rod secured to each side frame element of said seat in spaced, parallel relation thereto; a pair of leg frames; tubular means on the top of each said leg frame for pivotally engaging said support rod for movement of the leg frame between a collapsed position underlying said seat to a substantially vertical position to vertically support said seat thereon; and manually releasable means for securing each said tubular means against movement relative to the respective support rod in said substantially vertical position.

Claim 16

The apparatus of claim 11 wherein said manually releasable means comprises a spring pressed detent.

Claim 17

The apparatus of claim 11 wherein said tubular means comprises: a semi-tubular member having a bore diameter slightly larger than said support rod; and said semi-tubular member further having an elongated slot of slightly less than 180° in arcuate extent to permit said semi-tubular member to be snapped around said support rod.

Claim 18

The apparatus of claim 11 further comprising means depending from said seat frame for clamping said seat to a bench seat.

Claim 19

The apparatus of claim 11 further comprising at least one tip over prevention bar shiftably mounted on said seat frame for movement to a rearwardly projecting position, thereby permitting use of said chair as a beach chair with said leg frames pivoted to said underlying position relative to said seat.

Claim 20

The apparatus of claim 11 further comprising means depending from said seat frame for clamping said chair to a bench seat.