Stackable chair

A chair adapted to stack comprising:

• a frame;
• a seating portion connected to said frame;
• a backrest portion connected to said frame;
• at least one cross section of said seating portion defining a first set of two profiles of matching shape the first set of two profiles located on first and second surfaces of said seating portion, one of the first and second surfaces being a seating surface;
• at least one cross section of said backrest portion defining a second set of two profiles of matching shape the second set of two profiles located on first and second surfaces of said backrest portion and one of the first and second surfaces is a backrest surface;
• at least one of the seating or backrest surfaces is curved in a first plane perpendicular to a second plane, wherein the first and second sets of two profiles are located in the second plane and wherein said first and second sets of two profiles are curved;
• the at least one cross section of said seating portion and the at least one cross section of said backrest portion located in the second plane;
• and said seating portion rotates about an axis parallel to the first plane and located between the first set of two profiles
• the frame having a first section with a first thickness, the axis passing through the first section;
• a guard connected to the first section and extending below a bottom of the first section at a distance corresponding to a difference between a thickness of the seating portion and the first thickness.

A system of multiple chairs comprising:

• a first one of at least two chairs;
• a second one of at least two chairs;
• the at least two chairs each having:
• a frame including a first section defining a first thickness;
• a seating portion connected to the first section at a rotation axis, the rotation axis located between first and second surfaces of said seating portion wherein at least part of said first surface and at least part of said second surface define two matching profiles which are curved and said first surface is a seating surface;
• a second thickness measured between said first and second surface is greater than the first thickness;
• the first one of the at least two chairs configured to stack on the second one of the at least two chairs such that the at least part of the second surface of the second one of the at least two chairs is in contact with the at least part of the first surface of the first one of the at least two chairs such that the first sections of the at least two chairs are spaced apart.

A chair adapted to stack comprising:

• a frame including a first section defining a first thickness;
• a seating portion connected to the first section at a rotation axis, the rotation axis located between first and second surfaces of said seating portion wherein at least part of said first surface and at least part of said second surface define two matching profiles which are curved and said first surface is a seating surface;
• a second thickness measured between said first and second surface is greater than the first thickness;
• and
• a guard connected to the first section and extending below a bottom of the first section at a distance corresponding to a difference between the first thickness and second thickness.

A chair adapted to stack comprising:

• a frame having at least one leg portion, the at least one leg portion having a first thickness measured between two outer portions of the at least one leg portion at an axis;
• a seating portion connected to the frame;
• a backrest portion connected to the frame;
• at least one cross section of said backrest portion defining a set of two profiles of matching curved shape, the set of two profiles located on respective ones of first and second surfaces of said backrest portion, one profile of the set of two profiles is located on a backrest surface;
• the seating surface and the backrest surface are both curved in a first plane perpendicular to a second plane, the set of two profiles being located in the second plane;
• and
• a second thickness defined between the set of two profiles wherein the second thickness is greater than the first thickness;
• said seating portion rotates the axis and the axis is parallel to the first plane and located between the set of two profiles.

A chair adapted to stack comprising:

• a frame having at least one leg portion, the at least one leg portion having a first thickness measured between two outer portions of the at least one leg portion;
• a seating portion connected to the frame;
• a backrest portion connected to the frame;
• at least one cross section of said backrest portion defining a set of two profiles of matching curved shape, the set of two profiles located on respective ones of first and second surfaces of said backrest portion, one profile of the set of two profiles is located on a backrest surface;
• at least one of the seating or backrest surfaces is curved in a first plane perpendicular to a second plane, the set of two profiles being located in the second plane;
• and a second thickness defined between the set of two profiles wherein the second thickness is greater than the first thickness;
• a first section of said frame having a third thickness, said seating portion connected to the frame at the first section at a rotation axis;
• a fourth thickness defined between first and second surfaces of said seating portion wherein the fourth thickness is greater than the third thickness.

A chair comprising:

• a frame defining a backrest support;
• at least one channel connected to the frame and having at least one inwardly turned rib and an inner void;
• a cover having an open end and two sides, the open end configured to receive the backrest support;
• a section of the open end defining an elongated loop extending in a direction between the two sides;
• a c-shaped elongated member configured to insert into the elongated loop such that the rib is positioned between two parts of the elongated loop and the two parts are clamped within the c-shaped elongated member to secure the cover to the frame;
• a seating portion connected to said frame;
• a back portion including said backrest support;
• each of the seating and backrest portions defining first and second surfaces, the first surface of the seating portion being a seating surface;
• a cross section of the seating portion and a cross section of the backrest portion each taken in a plane perpendicular to an axis and each cross section defining two matching profiles corresponding to at least part of said first and second surfaces;
• each pair of the two matching profiles is curved;
• wherein the seating portion rotates about the axis located between the first and second surfaces of the seating portion.