Chair and method of making same

Claim 1

A chair comprising: (a) a chair seat; (b) a chair back; (c) a chair frame having means for supporting said chair seat and chair back; (i) said chair frame including front support means and at least one rear support member; (ii) said rear support member including an elongate bar having a generally rhomboidal cross-section and having four planar longitudinal surfaces defining two substantially equal and opposite obtuse angles and two substantially equal and opposite acture angles, each angle being between adjacent planar surfaces; (iii) said rear support member having a bent configuration including a lower leg portion, an upper back portion, and an intermediate transition portion; said upper back portion extending generally upwardly and forming a dihedral angle with said leg portion, said dihedral angle being substantially equivalent to one of said obtuse angles in that said intermediate transition portion is formed by a first bend in the plane of one of said planar longitudinal surfaces and a second bend in the plane of another of said planar surfaces extending at one of said obtuse angles to said first named plane; (d) said rear support member upper back portion having said chair back mounted thereon; (e) whereby an angle generally defined by the angle between general planes of extension of said chair back and said lower leg portion is dictated and controlled by said two opposite obtuse and said two opposite acute angles.

Claim 10

A method of constructing a chair, said method including the steps of: (a) providing first and second substantially identical pieces of tubular material, each piece having a substantially rhomboidal cross-section and four planar longitudinal surfaces defining first and second substantially equivalent and opposite obtuse angles and first and second substantially equivalent and opposite acute angles; (i) each tubular piece having first and third opposite and parallel flat outer surfaces and second and fourth opposite and parallel flat outer surfaces; (b) providing a first bend in said first tubular piece in the planes of said first and third flat outer surfaces; (c) providing a second bend in said first tubular piece in the planes of said second and fourth flat outer surfaces; (i) said second bend being opposite and generally equivalent to said first bend, thereby forming an S-like configuration in a portion of said flat tubular piece with a lower leg extension, an intermediate transition extension and an upper back extension being formed; said upper back extension forming a dihedral angle with said lower leg extension, said dihedral angle being generally dictated by said angles of said first tubular piece in that said transition extension is formed by a first bend in the plane of one of said intermediate planar longitudinal surfaces and a second bend in the plane of another of said planar longitudinal surfaces extending at one of said obtuse angles to said first named plane; (d) bending said second tubular piece in a manner similar, and generally opposite, to said first tubular piece, to conform said second tubular piece into a substantial mirror image of said first tubular piece; (e) providing first and second front leg extensions; (f) assembling a chair frame including orienting said first and second tubular pieces with said lower leg extensions forming rear legs, and mounting said front leg extensions to form front legs; (i) said upper back extensions extending generally upwardly, and rearwardly; (g) mounting a chair seat on said chair frame; (h) mounting a chair backrest on said upper back extensions; and (i) whereby a chair is constructed with a chair bachrest extending at a preselected angle with respect to rear legs of said chair, said preselected angle being controlled by said angles between said flat surfaces of said first and second tubular pieces.

Claim 11

A method of constructing a chair, said method including the steps of: (a) providing first and second substantially identical pieces of tubular material, each piece having a substantially rhomboidal cross-section and four planar longitudinal surfaces defining first and second substantially equivalent and opposite obtuse angles and first and second substantially equivalent and opposite acute angles; (i) each tubular piece having first and third opposite and parallel flat outer surfaces and second and fourth opposite and parallel flat outer surfaces; (b) providing a first bend in said first tubular piece in the planes of said first and third flat outer surfaces; (c) providing a second bend in said first tubular piece in the planes of said second and fourth flat outer surfaces; (i) said second bend being opposite and generally equivalent to said first bend, thereby forming an S-like configuration in a portion of said flat tubular piece with a lower leg extension, an intermediate transition extension and an upper back extension being formed; said upper back extension forming a dihedral angle with said lower leg extension, said dihedral angle being generally dictated by said angles of said first tubular piece in that said transition extension is formed by a first bend in the plane of one of said intermediate planar longitudinal surfaces and a second bend in the plane of another of said planar longitudinal surfaces extending at one of said obtuse angles to said first named plane; (d) bending said second tubular piece in a manner similar, and generally opposite, to said first tubular piece, to conform said second tubular piece into a substantial mirror image of said first tubular piece; (e) providing first and second front leg extensions; (f) assembling a chair frame including orienting said first and second tubular pieces with said lower leg extensions forming rear legs, and mounting said front leg extensions to form front legs; (i) said upper back extensions extending generally upwardly, and rearwardly; (g) mounting a chair seat on said chair frame; (h) mounting a chair backrest on said upper back extensions; and (i) whereby a chair is constructed with a chair bachrest extending at a preselected angle with respect to rear legs of said chair, said preselected angle being controlled by said angles between said flat surfaces of said first and second tubular pieces.

Claim 24

A method of constructing a chair, said method including the steps of: (a) providing first and second substantially identical pieces of tubular material, each piece having first and second adjacent longitudinal planar surfaces; said first and second planar surfaces of each of said pieces of tubular material forming an obtuse angle with respect to one another; (b) providing a first bend in said first tubular piece in the plane of said first planar surface; (c) providing a second bend in said first tubular piece in the plane of said second planar surface; (i) said second bend being generally opposite in direction to said first bend, thereby forming a generally S-like configuration in a portion of said first tubular piece with a lower leg extension, an intermediate transition extension and an upper back extension; said upper back extension forming a dihedral angle with said lower leg extension, said dihedral angle being generally equal to said obtuse angle in that said transition extension is formed by a first bend in the plane of one of said longitudinal planar surfaces and a second bend in the plane of another of said longitudinal planar surfaces extending at one of said obtuse angles to said first named plane; (d) bending said second tubular piece in a manner similar, and opposite to said first tubular piece, to conform said second tubular piece into a substantial mirror image of said first tubular piece; (e) providing first and second front leg extensions; (f) assembling a chair frame including orienting said first and second tubular pieces with said lower leg extensions forming rear legs, and mounting said front leg extensions to form front legs; (i) said upper back extensions of each tubular piece extending generally upwardly and rearwardly; (g) mounting a chair seat on said chair frame; (h) mounting a chair backrest on said upper back extensions; and (i) whereby a chair is constructed with a chair backrest extending at a preselected angle with respect to rear legs of said chair, said preselected angle being generally controlled by said angles between said flat surfaces of said first and second tubular pieces.

Claim 25

A method of constructing a chair, said method including the steps of: (a) providing first and second substantially identical pieces of tubular material, each piece having first and second adjacent longitudinal planar surfaces; said first and second planar surfaces of each of said pieces of tubular material forming an obtuse angle with respect to one another; (b) providing a first bend in said first tubular piece in the plane of said first planar surface; (c) providing a second bend in said first tubular piece in the plane of said second planar surface; (i) said second bend being generally opposite in direction to said first bend, thereby forming a generally S-like configuration in a portion of said first tubular piece with a lower leg extension, an intermediate transition extension and an upper back extension; said upper back extension forming a dihedral angle with said lower leg extension, said dihedral angle being generally equal to said obtuse angle in that said transition extension is formed by a first bend in the plane of one of said longitudinal planar surfaces and a second bend in the plane of another of said longitudinal planar surfaces extending at one of said obtuse angles to said first named plane; (d) bending said second tubular piece in a manner similar, and opposite to said first tubular piece, to conform said second tubular piece into a substantial mirror image of said first tubular piece; (e) providing first and second front leg extensions; (f) assembling a chair frame including orienting said first and second tubular pieces with said lower leg extensions forming rear legs, and mounting said front leg extensions to form front legs; (i) said upper back extensions of each tubular piece extending generally upwardly and rearwardly; (g) mounting a chair seat on said chair frame; (h) mounting a chair backrest on said upper back extensions; and (i) whereby a chair is constructed with a chair backrest extending at a preselected angle with respect to rear legs of said chair, said preselected angle being generally controlled by said angles between said flat surfaces of said first and second tubular pieces.