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US RE37,043 E1Granted
Layable seat
AssigneeKotobuki & Co., Ltd.
InventorRyokichi Yamazaki
Life of this patent
Estimating the term…
Abstract
A layable seat includes front and rear paired supporting legs which are layably raised on a floor at two positions separated from each other in a back-and-forth direction, a seat member pivotably connected to the front paired legs, paired link levers each of which has one end pivotably connected to the corresponding one pivotal center of the seat member and the other end pivotably connected to the corresponding rear leg. The seat member is elastically held at its half-folded position by torsion coil springs, and has paired engaging pins which project sideward therefrom and engage the lower edges of the link levers to hold the seat member at its horizontal position against a user's weight.
Claims26
A layable seat comprising:
- supporting leg means which is adapted to be mounted on a floor surface to be pivotable between a raised position where the leg means is raised from the floor surface and a horizontally laid position where the leg means is horizontally laid along the floor surface;
- a seat member which is mounted on said supporting leg means to be pivotable between a horizontal position where the seat member extends substantially horizontally from said supporting leg means located at the raised position and a folded position where the seat member is raised substantially vertically to extend along said supporting leg means located at the raised position;
- urging means which is mounted on said supporting leg means and urges said seat member to a half-folded position between the horizontal and folded positions;
- and
- forcible moving means which is mounted on said supporting leg means and forcibly moves said seat member from the half-folded position to the folded position against an urging force of said urging means in response to the pivotal movement of said supporting leg means from the raised position to the horizontally laid position.
2 more elements
A layable seat comprising:
- a first supporting leg situated on a floor surface and having a first rotational support portion and a distal and portion, the first rotational support portion being supported on the floor surface such that the first rotational support portion is rotatable around a first rotational center shaft, the distal end portion being opposite to the first rotational support portion, said first supporting leg being rotatable between a raised position where said first supporting leg is raised and a horizontally laid position where said first supporting leg is horizontally laid along the floor surface;
- a seat member, said seat member having a rotational support portion which is located in the front of the rear end of the seat member and which is supported by the first supporting leg to rotate around a rotational center shaft, said seat member being rotatable between a horizontal position where said seat member extends substantially horizontally from said first supporting leg located in the raised position and a folded position where said seat member is substantially vertically raised along said first supporting leg located in the raised position;
- a second supporting leg situated on the floor surface and in the rear of said first supporting leg, and having a second rotational support portion which is supported on the floor surface such that the second rotational support portion is rotatable around a second rotational center shaft, said second supporting leg being rotatable between a raised position where said second supporting leg is raised and a horizontally laid position where said second supporting leg is horizontally laid along the floor surface, the second rotational support portion being located in the rear of the first rotational support portion of said first supporting leg and in a higher position than the first rotational support portion, the second rotational center shaft being located in a higher position than the first rotational center shaft of said first supporting leg with reference to the floor surface;
- a backrest supported by said second supporting leg, said backrest extending upwards from the rear end of said seat member when said second supporting leg is located in the raised position thereof, and extending substantially horizontally along the floor surface when said second supporting leg is located in the horizontally laid position thereof;
- an armrest supported by the distal end portion of said first supporting leg and said second supporting leg such that said armrest is substantially horizontally located, said armrest having a third rotational support portion and a fourth rotational support portion, said third rotational support portion located at the rear end of said armrest and supported by said second supporting leg to rotate around a third rotational center shaft, said fourth rotational support portion located at a middle portion of said armrest, further forward than said third rotational support portion, and supported by the distal end portion of said first supporting leg to rotate around a fourth rotational center shaft, said armrest being rotatable to move said first and second supporting legs to interlock with each other, and the rotational support portion of said seat member being on a line connecting said fourth rotational center shaft and said first rotational center shaft;
- and
- urging means, supported by said first supporting leg, for urging said seat member toward a half-folded position between the horizontal position and the folded position.
4 more elements
A layable seat comprising:
- a supporting leg situated on a floor surface and having a first rotational support portion and a distal end portion, the first rotational support portion being supported on the floor surface such that the first rotational support portion is rotatable around a first rotational center shaft, the distal end portion being opposite to the first rotational support portion, said supporting leg being rotatable between a raised position where said supporting leg is raised and a horizontally laid position where said supporting leg is horizontally laid along the floor surface;
- a seat member, said seat member having a rotational support portion which is located in the front of the rear end of the seat member and which is supported by the supporting leg to rotate around a rotational center shaft, said seat member being rotatable between a horizontal position where said seat member extends substantially horizontally from said supporting leg located in the raised position and a folded position where said seat member is substantially vertically raised along said supporting leg located in the raised position;
- a backrest situated in the rear of said seat member and having leg member which has a second rotational support portion situated in the rear of said supporting leg such that the second rotational support portion is rotatable around a second rotational center shaft, said backrest being rotatable between a position where said backrest extends upwards from the rear end of said seat member when said supporting leg is located in the raised position and a position where said backrest is laid along the floor surface when said supporting leg is located in the horizontally laid position, the second rotational support portion of said backrest being located in a higher position than the first rotational support portion of said supporting leg with reference to the floor surface;
- an armrest supported by the distal end portion of said supporting leg and said backrest such that said armrest is substantially horizontally located, said armrest having a third rotational support portion and a fourth rotational support portion, said third rotational support portion located at the rear end of said armrest and supported by said leg member to rotate around a third rotational center shaft, said fourth rotational support portion located at a middle portion of said armrest, further forward than said third rotational support portion, and supported by the distal end portion of said supporting leg to rotate around a fourth rotational center shaft, said armrest being rotatable to move said leg member and said supporting leg to interlock with each other, and the rotational support portion of said seat member being on a line connecting said fourth rotational center shaft and said first rotational center shaft;
- and
- urging means, supported by said supporting leg, for urging said seat member toward a half-folded position between the horizontal position and the folded position.
3 more elements
A layable seat comprising:
- a first supporting leg situated on a floor surface and having a first rotational support portion and a distal end portion, the first rotational support portion being supported on the floor surface such that the first rotational support portion is rotatable around a first rotational center shaft, the distal end portion being opposite to the first rotational support portion, said first supporting leg being rotatable between a raised position where said first supporting leg is raised and a horizontally laid position where said first supporting leg is horizontally laid along the floor surface;
- a seat member, said seat member having a rotational support portion which is located in the front of the rear end of the seat member and which is supported by the first supporting leg to rotate around a rotational center shaft, said seat member being rotatable between a horizontal position where said seat member extends substantially horizontally from said first supporting leg located in the raised position and a folded position where said seat member is substantially vertically raised along said first supporting leg located in the raised position;
- a second supporting leg situated on the floor surface and in the rear of said first supporting leg, and having a second rotational support portion which is supported on the floor surface such that the second rotational support portion is rotatable around a second rotational center shaft, said second supporting leg being rotatable between a raised position where said second supporting leg is raised and a horizontally laid position where said second supporting leg is horizontally laid along the floor surface, the second rotational support portion being located in the rear of the first rotational support portion of said first supporting leg and in a higher position than the first rotational support portion, the second rotational center shaft being located in a higher position than the first rotational center shaft of said first supporting leg with reference to the floor surface;
- a backrest supported by said second supporting leg, said backrest extending upwards from the rear end of said seat member when said second supporting leg is located in the raised position thereof, and extending substantially horizontally along the floor surface when said second supporting leg is located in the horizontally laid position thereof;
- an armrest supported by the distal end portion of said first supporting leg and said second supporting leg such that said armrest is substantially horizontally located, said armrest having a third rotational support portion and a fourth rotational support portion, said third rotational support portion located at the rear end of said armrest and supported by said second supporting leg to rotate around a third rotational center shaft, said fourth rotational support portion located at a middle portion of said armrest, further forward than said third rotational support portion, and supported by the distal end portion of said first supporting leg to rotate around a fourth rotational center shaft, said armrest being rotatable to move said first and second supporting legs in interlock with each other, and the rotational support portion of said seat member being on a line connecting said fourth rotational center shaft and said first rotational center shaft.
2 more elements
A seating system comprising decks which are arranged in a stepwise manner and have top plates such that the top plates are located at different levels with reference to a floor surface, and seats which are arranged on upper surfaces of the top plates a first decks, each of said seats comprising:
- a first supporting leg situated on the upper surface of the top plate of an associated one of said decks and having a first rotational support portion and a distal end portion, the first rotational support portion being supported on the upper surface of the top plate such that the first rotational support portion is rotatable around a first rotational center shaft, the distal end portion being opposite to the first rotational support portion, said first supporting leg being rotatable between a raised position where said first supporting leg is raised and a horizontally laid position where said first supporting leg is horizontally laid along the upper surface of the top plate;
- a seat member, said seat member having a rotational support portion which is located in the front of the rear end of the seat member and which is supported by the first supporting leg to rotate around a rotational center shaft, said seat member being rotatable between a horizontal position where said seat member extends substantially horizontally from said first supporting leg located in the raised position and a folded position where said seat member is substantially vertically raised along said first supporting leg located in the raised position;
- a second supporting leg situated on the upper surface of the top plate of said associated one of said decks and in the rear of said first supporting leg, and having a second rotational support portion which is supported on the upper surface of the top plate such that the second rotational support portion is rotatable around a second rotational center shaft, said second supporting leg being rotatable between a raised position where said second supporting leg is raised and a horizontally laid position where said second supporting leg is horizontally laid along the upper surface of the top plate, the second rotational support portion being located in the rear of the first rotational support portion of said first supporting leg and in a higher position than the first rotational support portion, the second rotational center shaft being located in a higher position than the first rotational center shaft of said first supporting leg with reference to the upper surface of the top plate of said associated one of said deck;
- a backrest supported by said second supporting leg, said backrest extending upwards from the rear end of said seat member when said second supporting leg is located in the raised position thereof, and extending substantially horizontally along the upper surface of the top plate of said associated one of said decks when said second supporting leg is located in the horizontally laid position thereof;
- an armrest supported by the distal end portion of said first supporting leg and said second supporting leg such that said armrest is substantially horizontally located, said armrest having a third rotational support portion and a fourth rotational support portion, said third rotational support portion located at the rear end of said armrest and supported by said second supporting leg to rotate around a third rotational center shaft, said fourth rotational support portion located at a middle portion of said armrest, further forward than said third rotational support portion, and supported by the distal end portion of said first supporting leg to rotate around a fourth rotational center shaft, and the rotational support portion of said seat member being on a line connecting said fourth rotational center shaft and said first rotational center shaft;
- and
- urging means, supported by said first supporting leg, for urging said seat member toward a half-folded position between the horizontal position and the folded position.
4 more elements
A seating system comprising decks which are arranged in a stepwise manner and have top plates such that the top plates are located at different levels with reference to a floor surface, and seats which are arranged on upper surfaces of the top plates of said decks, each of said seats comprising:
- a supporting leg situated on the upper surface of the top plate of an associated one of said decks and having a first rotational support portion and a distal end portion, the first rotational support portion being supported on the upper surface of the top plate such that the first rotational support portion is rotatable around a first rotational center shaft, the distal end portion being opposite to the first rotational support portion, said supporting leg being rotatable between a raised position where said supporting leg is raised and a horizontally laid position where said supporting leg is horizontally laid along the upper surface of the top plate;
- a seat member, said seat member having a rotational support portion which is located in the front of the rear end of the seat member and which is supported by the supporting leg to rotate around a rotational center shaft, said seat member being rotatable between a horizontal position where said seat member extends substantially horizontally from said supporting leg located in the raised position and a folded position where said seat member is substantially vertically raised along said supporting leg located in the raised position;
- a backrest located in the rear of said seat member, and having a leg member having a second rotational support portion which is located in the rear of said supporting leg and supported on the upper surface of the top plate of said associated one of said decks such that the second rotational support portion is rotatable around a second rotational center shaft, said backrest extending towards from the rear end of said seat member when said supporting leg is located in the raised position, and extending substantially horizontally along the upper surface of the top plate when said supporting leg is located in the horizontally laid position, the second rotational support portion being located in a higher position than the first rotational support portion of said supporting leg with reference to the upper surface of the top plate of said associated one of said decks;
- an armrest supported by the distal end portion of said supporting leg and said backrest such that said armrest is substantially horizontally located, said armrest having a third rotational support portion and a fourth rotational support portion, said third rotational support portion located at the rear end of said armrest and supported by said leg member to rotate around a third rotational center shaft, said fourth rotational support portion located at a middle portion of said armrest, further forward than said third rotational support portion, and supported by the distal end portion of said supporting leg to rotate around a fourth rotational center shaft, said armrest being rotatable to move said leg member and said supporting leg to interlock with each other, and the rotational support portion of said seat member being on a line connecting said fourth rotational center shaft and said first rotational center shaft;
- and
- urging means, supported by said supporting leg, for urging said seat member toward a half-folded position between the horizontal position and the folded position.
3 more elements
Dependencies are inferred from the claim text.