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公开(公告)号：JPH03242113A
公开(公告)日：1991-10-29
申请号：JP31762390
申请日：1990-11-20
Applicant: STEELCASE INC
Inventor： KNOBLOCK GLENN A , BEUKEMA DUANE M , HOLDREDGE RUSSELL T , ROOSSIEN CHARLES P , SCOLTEN BRIAN L
IPC: A47C3/20 , A47C1/024 , A47C1/032 , A47C3/026 , A47C3/12 , A47C3/18 , A47C3/24 , A47C7/14 , A47C7/44 , A47C7/46 , A47C9/02
Abstract: PURPOSE: To provide a chair which is moved in the longitudinal direction along a user's back not to rub the back and produce wearing-away and discomfort feeling by arranging a chair back part and a chair seat part in such a manner that the common axis on which the above parts mutually turn is positioned adjacent to a point H, that is, a hip joint of a user. CONSTITUTION: A chair back part and a chair seat part are connected to each other in such a manner as to freely mutually turn on a common axis positioned above the chair seat part 6, in front of the chair back part 5, and substantially adjacent to a hip joint of a sitting user to limit the adjacent space relationship between the hip joint and the common shaft. The chair back part is supported on a base 4 to enable backward inclination of the chair back part. Further, the chair seat part is supported on the base to move the chair seat part on the base, so that the backward inclination of the chair back part simultaneously shifts the positions of the chair back part, the chair seat part and the common axis to keep the adjacent space relationship between the common axis and the hip joint of the sitting user and give improved sitting comfortableness and support of the user.
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公开(公告)号：JPH06253942A
公开(公告)日：1994-09-13
申请号：JP19913593
申请日：1993-07-16
Applicant: STEELCASE INC
Inventor： KNOBLOCK GLENN A , BEUKEMA DUANE M , HOLDREDGE RUSSELL T , ROOSSIEN CHARLES P , SCOLTEN BRIAN L
IPC: A47C3/20 , A47C1/024 , A47C1/032 , A47C3/026 , A47C3/12 , A47C3/18 , A47C3/24 , A47C7/14 , A47C7/44 , A47C7/46 , A47C9/02
Abstract: PURPOSE: To improve seating comfortability and durability of a chair, by providing a sideward rigid bar extending horizontally between an upper and a lower back parts of a back support inner shell to resist against bending in a horizontal plane. CONSTITUTION: The back support inner shell 27 forms an upper back 34 extending upward beyond the upper end of the back frame 8 and presents a bendable comfortable seating feeling. The back support inner shell 27 is placed extending between a lower back 33 to put fix the upper of the back frame 8 and an upper back 34 extending upward structured horizontally bendable and a side rigid bar 37 to resist against horizontal bending is put extending horizontally. Consequently, horizontal bending of the upper back 34 following twisting of the user body is hampered not to effect the lower back 33 thanks to the side rigid bar 37. As a result, eventual strong twisting motion in the upper back 34 would not cause stress focused onto fixture parts of the back frame 8, which would prevent them from getting damaged and satisfy the durability.
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公开(公告)号：JPH11103967A
公开(公告)日：1999-04-20
申请号：JP22366798
申请日：1998-07-22
Applicant: STEELCASE INC
Inventor： KNOBLOCK GLENN A , BEUKEMA DUANE M , HOLDREDGE RUSSELL T , ROOSSIEN CHARLES P , SCOLTEN BRIAN L
IPC: A47C3/20 , A47C1/024 , A47C1/032 , A47C3/026 , A47C3/12 , A47C3/18 , A47C3/24 , A47C7/14 , A47C7/44 , A47C7/46 , A47C9/02
Abstract: PROBLEM TO BE SOLVED: To prevent the shirt, etc., of a sitting person from being turned up by setting the rear inclining angle of a back frame and the tilting angle of a seat part by a controlling mechanism to be in a specific relation so as to control a posture so that the seat part approaches in a horizontal direction by synchronizing with this at the time of the backward tilting of the back frame. SOLUTION: A chair is constituted by providing a supporter 6 with a base assembly including a back frame 8 pivotally connected in the state of being capable of tilting between a standing posture and a forward inclined posture, a seat back part 48 supporting the hips of a sitting person, a seat 14 with a seat front part 47 supporting the thigh part of the sitting person, and a seat supporting means 7 provided with a rear part supporting means supporting the part 48 to a base part 81 in the neighborhood of the axis of the back frame 8 and a front part supporting means supporting the part 47 to the supporter 6. The rear part supporting means of the means 7 restricts the rear inclined angle α of the back frame 8 and the inclined angle β of the part 48 to be α>β by a control mechanism 95 moving the part 48 back/forth and up/down with respect to the base part 81 of the back frame 8 at the time of tilting the back frame 8.
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公开(公告)号：JPH06253943A
公开(公告)日：1994-09-13
申请号：JP19913693
申请日：1993-07-16
Applicant: STEELCASE INC
Inventor： KNOBLOCK GLENN A , BEUKEMA DUANE M , HOLDREDGE RUSSELL T , ROOSSIEN CHARLES P , SCOLTEN BRIAN L
IPC: A47C3/20 , A47C1/024 , A47C1/032 , A47C3/026 , A47C3/12 , A47C3/18 , A47C3/24 , A47C7/14 , A47C7/44 , A47C7/46 , A47C9/02
Abstract: PURPOSE: To ergonomically improve seating comfortability of a chair, by shifting the position of a common shaft to turn around the chair back to the seat keeping the adjacent space with the hip joint of a user. CONSTITUTION: Front part 37 of the chair seat 6 moves downward and rearward along the arch rail as a spring 145 bends downward and the chair back 5 tilts rearward since a guide 147 has a downward arch shape. Rear of the chair seat 6 would turn clockwise to the chair back 5 since the carrier face 93 and its engageable carrier pad 95 have both upward arch shape. Common shaft 7 rotates around the back pivot 10 along the arch together with the hip joint H-point 13 on keeping the adjacent space relation between the common shaft 7 and the H-point 13. Concurrently, the chair seat 6 and the chair back 5 rotate relatively around the rotary common shaft 7 to cause a synchronous tilting movement of the chair. Combination of these rotary motions would give the user considerably natural and comfortable bending reaction and a comfortable back support keeping pulling of shirts reduced.
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公开(公告)号：JPH06253941A
公开(公告)日：1994-09-13
申请号：JP19913493
申请日：1993-07-16
Applicant: STEELCASE INC
Inventor： KNOBLOCK GLENN A , BEUKEMA DUANE M , HOLDREDGE RUSSELL T , ROOSSIEN CHARLES P , SCOLTEN BRIAN L
IPC: A47C3/20 , A47C1/024 , A47C1/032 , A47C3/026 , A47C3/12 , A47C3/18 , A47C3/24 , A47C7/14 , A47C7/44 , A47C7/46 , A47C9/02
Abstract: PURPOSE: To enable user seating in a chair to keep comfortable position during tilt operation, by sinking the user's hip together with tilting of the back concurrently moving the thighs rearward linking with the tilting. CONSTITUTION: Seat front of the seat support inner shell 26 formed into a flexible seat is jointed to a supporter 6 through a front support means 7b as well as its seat rear is jointed to a back frame 8 through a rear support means 7a. As the tilt bearing 46 of the back frame 8 facing the supporter 6 is positioned downward the seat, the hip and the back of the user are jointly tilted without rolling up the her of a wearing garment. Further, the seat front is moved backward as the front support means 7b makes a part of a rearward mechanism to move the front supporter 130 back interacting with tilting of the back frame 8. Thus the user can keep a comfortable position without getting trousers wrinkled as the thighs are moved rearward jointly with the front seat on the hip sinking down together with the seat rear.
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Patent Agency Ranking
公开(公告)号：AU537766B2
公开(公告)日：1984-07-12
申请号：AU6678881
申请日：1981-01-30
Applicant: STEELCASE INC
Inventor： BEUKEMA DUANE M , KNOBLAUCH JACK R
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公开(公告)号：AU530563B2
公开(公告)日：1983-07-21
申请号：AU5889280
申请日：1980-05-29
Applicant: STEELCASE INC
Inventor： BEUKEMA DUANE M , KNOBLAUCH JACK R
Abstract: An easy to assemble, height adjustable chair base in which a column (20) telescopically received within a hub tube (10) includes a spring (40) and nut (50) located within the bottom of the column and carried on a threaded post (80) fixedly secured and projecting upwardly within the hub tube (10). A spring housing (30) is rotatably carried within the column (20) and the top abuts against an abutment shoulder (21) located within the column. The spring (40) is located within a spring housing (30) and both the spring and spring housing bear down on a washer (20) which in turn bears down on the nut (50). The column includes detent means (60) located on the column below the nut which disengages the nut when a person sits on the chair, but which is biased upwardly towards engagement with the nut by the action of the spring when the chair is unoccupied. When the chair is unoccupied, rotation of the chair will cause the nut to rotate upwardly or downwardly on the threaded post.
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公开(公告)号：CA1157366A
公开(公告)日：1983-11-22
申请号：CA376139
申请日：1981-04-24
Applicant: STEELCASE INC
Inventor： FAIKS FREDERICK S , PERGLER CHARLES C , WHITWAM RONALD L , KNOBLAUCH JACK R , BEUKEMA DUANE M , HOZESKI KENNETH W
Abstract: ABSTACT OF THE DISCLOSURE The specification discloses a synchrotilt chair control in which a slide is provided between the front Or the seat support and stationary control housing, which slide serves not only to make possible synchrotilt action between the back support and seat support, but also makes possible the incorporation of a seat adjustment assembly. The latter comprises a pivot bracket pivotally mounted on the slide and on the seat support, and an actuator for pivoting the pivot bracket. The pivotal mounting between the seat support and back support is also dual functional in that it supports a pivotally mounted lock plate for locking the control. A height adjustment actuator and hidden handle pretension adjustment bolt are also provided.
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公开(公告)号：CA1137864A
公开(公告)日：1982-12-21
申请号：CA352370
申请日：1980-05-21
Applicant: STEELCASE INC
Inventor： BEUKEMA DUANE M , KNOBLAUCH JACK R
Abstract: HEIGHT ADJUSTABLE CHAIR BASE The specification discloses a compact, easy to assemble, height adjustable chair base in which a column telescopically received within a hub tube includes a spring and nut assembly located within the bottom of the column and carried on a threaded post fixedly secured and projecting upwardly within the hub tube. A spring housing is rotatably carried within the column and the top abuts against an abutment shoulder located within the column. The spring is located within the spring housing and both the spring and spring housing bear down on a washer which in turn bears down on the nut. The column includes portions extending around and below the nut, includes detent means located on the column below the nut which disengage the nut when a person sits on the chair, but which is biased upwardly towards engagement with the nut by the action of the spring when the chair is unoccupied. When the chair is unoccupied, rotation of the chair will cause the nut to rotate upwardly or downwardly on the threaded post.
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公开(公告)号：CA1263296A
公开(公告)日：1989-11-28
申请号：CA533766
申请日：1987-04-03
Applicant: STEELCASE INC
Inventor： KNOBLOCK GLENN A , BEUKEMA DUANE M , TEPPO DAVID S
IPC: A47C3/20 , A47C1/024 , A47C1/032 , A47C3/026 , A47C3/12 , A47C3/18 , A47C3/24 , A47C7/14 , A47C7/44 , A47C7/46 , A47C9/02
Abstract: INTEGRATED CHAIR AND CONTROL An integrated chair and control arrangement is provided for tilt back chairs, and other similar seating. The chair has a base, as well as a back and a bottom or seat which are interconnected for mutual rotation about a common axis. The common axis is located above the chair bottom, forward of the chair back, and generally adjacent to the hip joints of a seated user. A control supports the chair back and chair bottom on the base in a manner such that rearward tilting of the chair back simultaneously shifts the chair back, the chair bottom, and the location of the common axis in a manner which maintains the adjacent spatial relationship between the common axis and the hip joints of the seated user to provide improved comfort and support.
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