Patents Assigned to Kotobuki Corporation
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Patent number: 6055780Abstract: A retractable stairs-like stand has rows of seats on moveable floor-bases arranged in a stair-like manner for use in an auditorium or stadium-like application. A variety of seating styles can be accommodated due to the retracted storage position used wherein the steps are shifted to all be in vertical alignment, and the seats are stored in a nested configuration with corresponding seats in vertical alignment to provide a more compact arrangement.Type: GrantFiled: May 26, 1998Date of Patent: May 2, 2000Assignee: Kotobuki CorporationInventor: Ryokichi Yamazaki
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Patent number: 6000174Abstract: A retractable, stairs-like stand includes plural steps of floor-bases which are moved horizontally between the advanced position where the floor-bases are mutually shifted into a form of stairs and the retracted position where the floor-bases are mutually lined up along the vertical direction, and plural seats fitted onto the floor-bases. The front portions of the respective floor-bases are equipped with parallel link mechanism for parallel moving the seat sections of the seats back and forth between the use-position where the seat sections of the seats are spaced from the floor-bases and the descent position where the seat sections of the seats are adjacent the floor-bases. Fastening mechanisms are disposed for selectively fixing the seat sections to the use-position and the fastening position where releasing the sections from the use-position.Type: GrantFiled: June 9, 1998Date of Patent: December 14, 1999Assignee: Kotobuki CorporationInventor: Ryokichi Yamazaki
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Patent number: 5685608Abstract: A seat comprises a first frame rotatable between a first position where the frame is raised from a floor surface and a second position where said frame is horizontally moved down along the floor surface, and a second frame rotatable between a raise position where the frame is raised from the floor surface and a folding position where the frame is horizontally moved down along the floor surfaces at the back of the first frame. The first and second frames are interlocked each other through arm rest. A seat cushion is rotatably supported on the first frame. A back rest is supported on the second frame to be rotatable in back and forth directions through a pivot shaft. The back rest and the first frame are interlocked each other through a link member. The link member rotates the back rest in a direction where the lower end portion of the back rest is drawn forward when the first frame is rotated to the first position.Type: GrantFiled: February 21, 1996Date of Patent: November 11, 1997Assignee: Kotobuki CorporationInventor: Ryokichi Yamazaki
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Patent number: 5328238Abstract: 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.Type: GrantFiled: October 27, 1992Date of Patent: July 12, 1994Assignee: Kotobuki CorporationInventor: Ryokichi Yamazaki
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Patent number: 5328239Abstract: A flip-up type seat has a seat member support, a seat member, and a seat member coupling mechanism interposed between the seat member support and the seat member to couple the seat member to the seat member support in such a way that the seat member can be freely moved between its horizontal seated position and its vertical flipped-up position. The seat member coupling mechanism cause the rear end of the seat member to be moved up and down in the vertical direction and the front end thereof forward and backward in the horizontal direction when the seat member is moved between its seated position and its flipped-up position.Type: GrantFiled: June 11, 1992Date of Patent: July 12, 1994Assignee: Kotobuki CorporationInventor: Ryokichi Yamazaki
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Patent number: 5257852Abstract: A damper device for an automatic folding chair enables the seat of the chair to be turned downward to a ready-for use position without being subjected to any braking force when it is lightly pushed down. When the use leaves the seat in the ready-for-use position, it automatically and slowly returns to an upright position under a braking effort exerted thereto.Type: GrantFiled: July 8, 1992Date of Patent: November 2, 1993Assignees: Sugatsune Industrial Co., Ltd., Kotobuki CorporationInventors: Ken Tsuneki, Kazuyosh Ohshima, Yojiro Nakayama
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Patent number: RE37043Abstract: 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.Type: GrantFiled: July 11, 1996Date of Patent: February 6, 2001Assignee: Kotobuki CorporationInventor: Ryokichi Yamazaki
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Patent number: D439428Type: GrantFiled: December 6, 1999Date of Patent: March 27, 2001Assignee: Kotobuki CorporationInventor: Satoshi Mizuno
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Patent number: D396967Type: GrantFiled: May 15, 1997Date of Patent: August 18, 1998Assignee: Kotobuki CorporationInventor: Ryokichi Yamazaki