GB2083347A - Vehicle safety seat - Google Patents

Vehicle safety seat Download PDF

Info

Publication number
GB2083347A
GB2083347A GB8029602A GB8029602A GB2083347A GB 2083347 A GB2083347 A GB 2083347A GB 8029602 A GB8029602 A GB 8029602A GB 8029602 A GB8029602 A GB 8029602A GB 2083347 A GB2083347 A GB 2083347A
Authority
GB
United Kingdom
Prior art keywords
seat
frame
flap
knees
occupant
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB8029602A
Other versions
GB2083347B (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BSG International Ltd
Original Assignee
BSG International Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BSG International Ltd filed Critical BSG International Ltd
Priority to GB8029602A priority Critical patent/GB2083347B/en
Publication of GB2083347A publication Critical patent/GB2083347A/en
Application granted granted Critical
Publication of GB2083347B publication Critical patent/GB2083347B/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
    • B60N2/42—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats
    • B60N2/427—Seats or parts thereof displaced during a crash
    • B60N2/42727—Seats or parts thereof displaced during a crash involving substantially rigid displacement
    • B60N2/42745—Seats or parts thereof displaced during a crash involving substantially rigid displacement of the back-rest
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
    • B60N2/42—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats
    • B60N2/4207—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats characterised by the direction of the g-forces
    • B60N2/4214—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats characterised by the direction of the g-forces longitudinal
    • B60N2/4221—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats characterised by the direction of the g-forces longitudinal due to impact coming from the front

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  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Seats For Vehicles (AREA)

Abstract

In a safety seat installation in a vehicle such as a bus or coach, where the seat is one of a longitudinal row of similar forward facing seats, the back 22 is pivotally mounted at a point 27 below the knees of an occupant 38 of the seat behind. A flap 24 is pivotally mounted at 34 and coupled by a slot 32 and cam follower 30 to the top of the seat back 22. In the event of sudden deceleration, for example in an accident, the rearwardly seated occupant's knees push the seat back 22 forwards so that the top thereof pushes the flap 24 backwards into a position to restrain the rearwardly seated occupant's torso. <IMAGE>

Description

SPECIFICATION Vehicle safety seat This invention relates to a safety seat for installation in a vehicle such as a bus or coach, the seat being one of a longitudinal row of similar forward-facing seats and being adapted to restrain the forward movement of the occupant of the next rearward seat when the vehicle abruptly decelerates.
Our co-pending Application No. 7905486 (U.K. Specification No. 2041736) discloses a safety seat for installation in such a vehicle.
The seat back is pivotally mounted for movement about an axis above the level of the knees of the next rearwardly seated occupant and the upper end of the back is arranged to engage with a flap which is pivotally mounted near the top of the seat frame. When the vehicle is subject to sufficiently severe deceleration to project such rearwardly seated occupant forwardly relative to the seat in front of him, the impact of his knees on the seat back causes the bottom of the flap to be pushed towards him so that the flap is deployed to serve as an upper torso restraint.
However this arrangement suffers from the disadvantage that it is difficult to ensure that the pivot axis of the seat back is at a sufficient height above the knees of taller people while positioning the flap in a location suitable for shorter people.
According to the present invention, a safety seat for a vehicle comprises a frame, a back portion mounted for angular movement relative to the frame about an axis located below the normal knee level of the rearwardly seated occupant and a flap portion pivotally mounted on the frame and having a slot for engagement with a cam follower on the seat back so that, when force is exerted on the seat back by seat occupant's knees when a pre-determined vehicle deceleration is exceeded, the flap portion is deployed so as to confront the part of the occupant's torso above the knees.
An embodiment of the invention will now be described with reference to the accompanying drawings in which, Figures 1 and 2 shows a modification to the safety seat disclosed in the above mentioned patent application. The modified seat 20 has a back portion 22 and a flap 24, the upper end of which serves as a head rest. The back portion 22 is mounted on a back frame 26 which is pivotally attached at 27 to the back of a seat subframe 28 which is secured to the floor of the vehicle. The upper end of the frame 26 carries a cam follower 30 which engages in a slot 32 in the flap 24. The flap 24 is also pivotally mounted at 34 on the seat frame 36 which is fixed to the subframe 28.
Thus, in contrast to the seat illustrated in the above mentioned patent application, the seat back 22 pivots about an axis located below the knees of an occupant 38 of the next rearward seat. The back frame 26 is connected to the seat frame 36 by one or more sheer pins, break out latches or the like arranged to release the back frame 26, and the back portion 22 mounted thereon, when a pre-determined force is exerted by the knees of the occupant 38. When the top of the frame 26 moves forwards, the cam follower 30 travels along the slot 32 and the flap 24 is tilted to the position shown in Fig. 2. Instead of providing a pivotal attachment at 27, the back frame 26 may be welded, at 27, to the back of the seat sub-frame 28.In this case, the strength of the back frame 26 is arranged to be such that it bends when the force exerted on it by the knees of the rearwardly seated occupant 38 exceeds the above mentioned pre-determined level.
1. A safety seat for a vehicle comprising a frame, a back portion mounted for angular movement relative to the frame about an axis located below the normal knee level of the rearwardly seated occupant and a flap portion pivotally mounted on the frame and having a slot for engagement with a cam follower on the seat back so that, when force is exerted on the seat back by seat occupant's knees when a pre-determined vehicle deceleration is exceeded, the flap portion is deployed so as to confront the part of the occupant's torso above the knees.
2. A safety seat according to claim 1, wherein the back and lap portions are fixed in their normal back rest position by means adapted to disengage or rupture when a predetermined force is exceeded.
3. A safety seat according to claim 1 or 2, wherein the frame is constructed of materials such that it deforms to absorb some of the energy of the rearwardly seated occupant's forward motion after the flap has been deployed.
4. A safety seat for a vehicle substantially as hereinafter described with reference to the accompanying drawings.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (4)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Vehicle safety seat This invention relates to a safety seat for installation in a vehicle such as a bus or coach, the seat being one of a longitudinal row of similar forward-facing seats and being adapted to restrain the forward movement of the occupant of the next rearward seat when the vehicle abruptly decelerates. Our co-pending Application No. 7905486 (U.K. Specification No. 2041736) discloses a safety seat for installation in such a vehicle. The seat back is pivotally mounted for movement about an axis above the level of the knees of the next rearwardly seated occupant and the upper end of the back is arranged to engage with a flap which is pivotally mounted near the top of the seat frame. When the vehicle is subject to sufficiently severe deceleration to project such rearwardly seated occupant forwardly relative to the seat in front of him, the impact of his knees on the seat back causes the bottom of the flap to be pushed towards him so that the flap is deployed to serve as an upper torso restraint. However this arrangement suffers from the disadvantage that it is difficult to ensure that the pivot axis of the seat back is at a sufficient height above the knees of taller people while positioning the flap in a location suitable for shorter people. According to the present invention, a safety seat for a vehicle comprises a frame, a back portion mounted for angular movement relative to the frame about an axis located below the normal knee level of the rearwardly seated occupant and a flap portion pivotally mounted on the frame and having a slot for engagement with a cam follower on the seat back so that, when force is exerted on the seat back by seat occupant's knees when a pre-determined vehicle deceleration is exceeded, the flap portion is deployed so as to confront the part of the occupant's torso above the knees. An embodiment of the invention will now be described with reference to the accompanying drawings in which, Figures 1 and 2 shows a modification to the safety seat disclosed in the above mentioned patent application. The modified seat 20 has a back portion 22 and a flap 24, the upper end of which serves as a head rest. The back portion 22 is mounted on a back frame 26 which is pivotally attached at 27 to the back of a seat subframe 28 which is secured to the floor of the vehicle. The upper end of the frame 26 carries a cam follower 30 which engages in a slot 32 in the flap 24. The flap 24 is also pivotally mounted at 34 on the seat frame 36 which is fixed to the subframe 28. Thus, in contrast to the seat illustrated in the above mentioned patent application, the seat back 22 pivots about an axis located below the knees of an occupant 38 of the next rearward seat. The back frame 26 is connected to the seat frame 36 by one or more sheer pins, break out latches or the like arranged to release the back frame 26, and the back portion 22 mounted thereon, when a pre-determined force is exerted by the knees of the occupant 38. When the top of the frame 26 moves forwards, the cam follower 30 travels along the slot 32 and the flap 24 is tilted to the position shown in Fig. 2. Instead of providing a pivotal attachment at 27, the back frame 26 may be welded, at 27, to the back of the seat sub-frame 28.In this case, the strength of the back frame 26 is arranged to be such that it bends when the force exerted on it by the knees of the rearwardly seated occupant 38 exceeds the above mentioned pre-determined level. CLAIMS
1. A safety seat for a vehicle comprising a frame, a back portion mounted for angular movement relative to the frame about an axis located below the normal knee level of the rearwardly seated occupant and a flap portion pivotally mounted on the frame and having a slot for engagement with a cam follower on the seat back so that, when force is exerted on the seat back by seat occupant's knees when a pre-determined vehicle deceleration is exceeded, the flap portion is deployed so as to confront the part of the occupant's torso above the knees.
2. A safety seat according to claim 1, wherein the back and lap portions are fixed in their normal back rest position by means adapted to disengage or rupture when a predetermined force is exceeded.
3. A safety seat according to claim 1 or 2, wherein the frame is constructed of materials such that it deforms to absorb some of the energy of the rearwardly seated occupant's forward motion after the flap has been deployed.
4. A safety seat for a vehicle substantially as hereinafter described with reference to the accompanying drawings.
GB8029602A 1980-09-02 1980-09-12 Vehicle safety seat Expired GB2083347B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8029602A GB2083347B (en) 1980-09-02 1980-09-12 Vehicle safety seat

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8028338 1980-09-02
GB8029602A GB2083347B (en) 1980-09-02 1980-09-12 Vehicle safety seat

Publications (2)

Publication Number Publication Date
GB2083347A true GB2083347A (en) 1982-03-24
GB2083347B GB2083347B (en) 1984-08-30

Family

ID=26276751

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8029602A Expired GB2083347B (en) 1980-09-02 1980-09-12 Vehicle safety seat

Country Status (1)

Country Link
GB (1) GB2083347B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997020707A1 (en) * 1995-12-07 1997-06-12 Henlys Group Plc Safety seat
US5882072A (en) * 1996-12-16 1999-03-16 The Boeing Company Reduced head impact seat system
US6953223B2 (en) * 2004-02-26 2005-10-11 International Truck Intellectual Property Company, Llc Energy absorbing seat and seat system for a mobile vehicle

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997020707A1 (en) * 1995-12-07 1997-06-12 Henlys Group Plc Safety seat
US6003937A (en) * 1995-12-07 1999-12-21 Henlys Group Plc Safety seat
US5882072A (en) * 1996-12-16 1999-03-16 The Boeing Company Reduced head impact seat system
US6953223B2 (en) * 2004-02-26 2005-10-11 International Truck Intellectual Property Company, Llc Energy absorbing seat and seat system for a mobile vehicle

Also Published As

Publication number Publication date
GB2083347B (en) 1984-08-30

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19940912