United States Patent
`
`[191
`
`[11] Patent Number:
`
`5,015,010
`
`I-lomeier et al.
`
`[45] Date of Patent:
`
`May 14, 1991
`
`[54] sex: n~m«:c;mm:n smr BELT SYSTEM
`
`[75]
`
`Inventors: Ronald F. Homeier, Plainfield; Allen
`R. Lortz, Carmel: Willinrn L. Clifton,
`III, Lebanon; Jeffrey L. Williams,
`Zionsville. all of Ind.
`
`[73] Assignee:
`
`Indiana Millet «I: Manufacturing, Inc.,
`Westfield. Ind.
`
`[21] Appl. No.: 491,537
`
`_
`Mar. 12, 1990
`[22] Filed:
`[51]
`Int. Cl.5 . . .. . . .
`. . . . . . . . . . . . . . . .. B6011 21/16
`[52] us. Cl. ................................ .. 230/303; 297/433
`[58] Field of Search ............... .. 230/301. 803; 297/436
`
`[56]
`
`References Cited
`U.S. PATENT DOCUMENTS
`
`4,532,366
`4.840.404
`4,846,493
`
`5/1939 Corbett et al. ...................."130/308
`
`611939 Falterman . . . . . . . .
`. . . . . .. 280/808
`7/1989 Fohl .................................. .. 280/808
`
`Attorney, Agent, or Firm—Wooda.rd, Emhardt,
`Naughton, Moriarty & McNett
`
`[51]
`
`ABSTRACT
`
`A seat integrated seat belt system. A three point seat
`belt system includes a belt having one end affixed to the
`seat and an opposite end mounted to a retractor secured
`to the seat. A seat belt tongue is mounted to the belt
`intermediate the belt ends and is releasnbly lockable
`_ _with a belt buckle on the opposite side of the seat
`thereby pulling one portion of the belt across the pas-
`senger lap and another portion of the belt across the
`passenger upper torso. The belt extends through a guide
`located at the top of the seat. A seat tether includes a
`second belt having one end attached to the seat at the
`location of the guide and a second end mounted to a
`second retractor located beneath the seat. The second
`retractor is operable to limit motion of the seat thereby
`minimizing the impact of vehicle motion on the first belt
`securing the passenger to the seat.
`
`Primary E.rarm'm2r—KetIneth R. Rice
`
`16 Claims. 6 Drawing Sheets
`
`IPR2016-01872
`IPR2016—01872
`AVS
`AVS
`Exhibit 2016
`Exhibit 2016
`
`

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`U.S. Patent
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`May 14,1991
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`Sheet 1 of 6
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`5,015,010
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`U.S. Patent
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`May 14, 1991
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`Sheet 2 of 6
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`5,015,010
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`U.S. Patent
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`May 14, 1991
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`Sheet 3 of 6
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`5,015,010
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`US. Patent
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`May 14, 1991
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`Sheet 4 of 6
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`5,015,010
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`5,015,010
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`

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`U.S. Patent
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`May 14, 1991
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`Sheet 6 of 6
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`5,015,010
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`

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`1
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`5,015,010
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`SEAT INTEGRATED SEAT BELT SYSTEM
`
`BACKGROUND OF THE INVENTION
`
`1. Field of the Invention
`This invention is in the field of seat belt systems.
`2. Description of the Prior Art
`Seat belt systems are available combining a lap belt
`and upper torso belt. Typically, a single belt having its
`opposite ends mounted to a pair of retractors has a seat
`belt tongue mounted to the belt intermediate the belt
`ends. The tongue may then be swung across the person
`and engaged with a buckle affixed to the seat thereby
`positioning one portion of the belt across the lap and
`another portion of the belt across the upper torso. In- '
`stead of mounting both ends of the belt to a pair of
`retractors, some systems have only one end of the belt
`mounted to a retractor whereas the opposite end of the
`belt is affixed to the vehicle.
`Rough riding equipment. such as trucks, provide
`special problems in relationship to seat belt systems.
`Slack inducing mechanisms are typically required to
`isolate the driver from belt pressure created by retractor
`lock up. Certain slack inducing mechanisms do not
`automatically provide for constant belt tensioning and
`constant belt pressure applied to the driver. The system
`disclosed herein reduces or eliminates the discomfort
`from belt pressure and cinching without the use of slack
`inducing mechanisms.
`It has been the prior approach to increase the
`strength of the vehicle floor and seat in order to reduce
`the-motion between the seat and vehicle which occurs
`during a crash. Such modifications are costly and re-
`quire more expensive seats. Disclosed herein is a tether
`system which minimizes such relative motion while
`allowing for use of relatively inexpensive seats and
`elimination of any additional strengthening or rigidizing
`of the vehicle floor.
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`SUMMARY OF THE INVENTION
`
`One embodiment of the present invention is a vehicle
`passenger restraint system comprising a passenger seat
`movable mounted in a vehicle with the passenger seat
`having a upwardly extending back support, a passenger
`belt releasably extending across the passenger operable
`to secure the passenger in the seat, and, a web mounted
`to the vehicle and passenger seat and including a first
`portion secured to the back support and 3 second por-
`tion secured to the vehicle, the web operable to extend
`and retract as the seat controllably moves relative to the
`vehicle but further operable to limit movement of the
`back support relative to the vehicle during emergency
`stops.
`Another embodiment of the present invention is a
`tether for holding a vehicle passenger seat with a back
`portion comprising a tether assembly mountable to a
`vehicle and a passenger seat therein, the tether assembly
`including an extendable and retractable web extending
`between the passenger seat and the vehicle with the
`tether assembly being operable via the web to allow
`relative motion between the passenger seat and the
`vehicle during passenger adjustment but limiting rela-
`tive motion during emergency stops.
`It is an object of the present invention to provide an
`integrated seat belt system which reduces or eliminates
`the discomfort from belt pressure and cinching without
`the use of slack inducing mechanisms.
`
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`A further object of the present invention is to provide
`a vehicle passenger restraint system to minimize belt
`movement normally resulting from normal vehicle mo-
`tion.
`
`A further object of the present invention is to provide
`a tether for holding a vehicle passenger seat to insure
`constant seat belt pressure relative to the passenger.
`Related objects and advantages of the present inven-
`tion will be apparent from the following description.
`BRIEF DESCRIPTION OF THE DRAWINGS
`
`FIG. 1 is a side view of a vehicle seat and associated
`seat belt system incorporating the present invention.
`FIG. 2 is the same view as FIG. 1 only showing a
`person occupying the seat.
`FIG. 3 is an enlarged top view of the seat of FIG. 1.
`FIG. 4 is an enlarged, fragmentary, cross-sectional
`view taken along the line 4-4 of FIG. 3 and viewed
`fragmentary, in the direction of the arrows.
`FIG. 5 is an enlarged, cross-sectional view taken
`along the line 5-5 of FIG. 3 and viewed in the direc-
`tion of the arrows.
`FIG. 6 is a side view of an alternate guide for the seat
`tether.
`FIG. 7 is a fragmentary enlarged rear view of the seat
`of FIG. 1.
`
`DESCRIPTION OF THE PREFERRED
`EMBODIMENT
`
`For the purposes of promoting an understanding of
`the principles of the invention. reference will now be
`made to the embodiment illustrated in the drawings and
`specific language will be used to describe the same. It
`will nevertheless be understood that no limitation of the
`scope of the invention is thereby intended, such alter-
`ations and further modifications in the illustrated de-
`vice, and such further applications of the principles of
`the invention as illustrated therein being contemplated
`as would normally occur to one skilled in the art to
`which the invention relates.
`Referring now more particularly to FIGS. 1 and 2,
`there is shown the seat integrated seat belt system 20
`incorporating the present invention. The seat includes a
`seat cushion 21 upon which passenger 22 sits also being
`supported by back support 23. Cushion 21 and back
`support 23 are mounted atop frame 24 which may be
`horizontally and vertically moved. System 20 includes a
`seat belt 25 having a first end 26 securely anchored by
`fastening device 2".’ to frame 24. The opposite end 28 of
`the belt is mounted and wound on a spindle rotatably
`mounted within a conventional emergency locking
`retractor 29. Belt 25 extends freely through a guide 30
`fixedly mounted to the top portion 31 of seat back sup-
`port 23. The belt extends through a conventional seat
`belt buckle tongue 32 which may be pulled across pas-
`senger 22 to lockingly engage a conventional seat belt
`buckle 33 fixedly secured to frame 24. Thus, belt 25 has
`a lap portion 45 extending across the lap of passenger 22
`and an upper torso portion 34 extending across the chest
`of the passenger.
`Anchor plate 35 (FIG. 4) is fixedly secured by con-
`ventional fastening devices 36 to the back surface of the
`top 31 of back support 23. A D-loop guide 37 (FIG. 5)
`is mounted to plate 35 by means of a fastener 38. The
`fastener may take the form of a bolt and nut combina-
`tion. Further, the fastener may be designed to allow
`guide 37 to pivot about the longitudinal axis of the bolt.
`Guide 37 includes a slot 39 through which belt 25 freely
`
`

`
`3
`extends. Buckle tongue 32 has a pair of spaced apart
`slots 40 and 41 separated by wall 42. Belt 25 extends
`outwardly through slot 40 and then back through slot
`41 allowing the buckle tongue to be adjusted along the
`- length of the belt for sizing of the belt portion 45 ex-
`tending across the lap of the occupant. The tongue has
`a distal end 43 with an aperture 44 to locltingly engage
`a conventional seat belt buckle 33 mounted to the seat
`on the side opposite of the location of the opposite ends
`26 and 28 of the belt.
`
`A seat tether is provided to reduce the motion of the
`seat and seat belt normally resulting from vehicle mo-
`tion. The tether includes a belt 50 (FIG. 1) having an
`outer end 51 fixedly attached to anchor plate 35 and an
`opposite end 52 mounted to and wound upon a spindle '
`rotatably mounted within a conventional emergency
`locking retractor 53 mounted to the floor 94 of the
`vehicle beneath seat frame 24. A guide 54 is fixedly
`mounted to the vehicle thereby guiding the belt verti-
`cally upward from the retractor and then through the
`guide with the belt then extending horizontally to the
`top 31 of the seat. End 51 of belt 50 is fixedly secured to
`belt plate 95 (FIG. 4) in turn mounted by fastener 38 to
`plate 35. Thus, the distal end of belt 50 is attached to the
`back support 23 of the seat at the location of the mount-
`ing of the first belt guide 3'.-'. The tether system mini-
`mizes motion of the seat normally resulting from vehi-
`cle motion and, therefore. reduces motion of belt 25.
`Tether guide 54 (FIG. 1) is fixedly mounted to the
`vehicle by fastener 60 and has an outwardly projecting
`wall 61 with a an aperture provided therein through
`which belt 50 extends freely. An adjustable belt guide
`may be utilized in lieu of the fixed guide 54. A variety of
`adjustable belt guides are commercially available with
`one such guide shown in FIG. 6. Guide 62 includes a
`frame 63 fixedly secured to the vehicle with frame 63
`having a pair of tracks upon which is slidably mounted
`slide 64. A push button control 65 is mounted to slide 64
`to allow for the vertical adjustment and positioning of
`guide 66 fixedly mounted to slide 64 by fastener 6?.
`Aperture 6? is formed on the outwardly projecting
`portion of guide 66 with the belt extending freely
`through aperture 67. One such guide is disclosed in U.S.
`Pat. No. 4,652,012 with is incorporated herein by refer-
`ence. Both guides 54 and 62 may be mounted to the
`B-pillar of the vehicle.
`The seat shown in FIG. 1 is supported upon either an
`air or mechanical suspension allowing for adjustable,
`vertical movement. Seat frame 24 includes a horizon-
`tally extending wall 10 upon which the seat cushion and
`back support are mounted. The frame includes a pair of
`depending side walls ".-'1 (FIG. 7) and 72 having in-
`wardly turned flanges T3 and 74. A pair of upper tracks
`75 and ".-'6 are fixedly fastened to wall 70 and depend
`therefrom being located opposite from and aligned with
`a second pair of tracks 77 and 1'8 fixedly mounted atop
`base plate 99. Tracks 75 and 76 include downwardly
`opening grooves 79 and B0 opposed to and aligned with
`a pair of upwardly extending grooves 81 and 32 formed
`in tracks Tl and 73. Bearings 83 and 84 are located
`within grooves 79 through 32 allowing frame '70 to
`move horizontally relative to base plate 99. A load
`support pin or bolt 83 extends through an aperture of
`wall 70, and then through a slot formed in base plate 99
`and is affixed thereto by not 84. Thus, as wall 70 moves
`horizontally with fastener 83, base plate 79 remains
`stationary allowing pin 83 to move within the slot
`formed in plate 99.
`
`5,015,010
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`4
`Base plate 99 is mounted atop a pair of scissor links 85
`and 86 having their top ends pivotally mounted to plate
`99 and the bottom ends pivotally mounted to housing 87
`mounted fixedly atop floor 94. A conventional air or
`mechanical suspension 88 is mounted to housing 87
`having a top end affixed to base plate 99, and being
`operable to move the base plate and accompanying seat
`frame 24 and seat upwardly or downwardly. A shock
`absorber may also be located between base plate 99 and
`housing 8'.-'. Base plate 99 is normally spaced apart and
`above flanges 73 and 74 which may contact plate 79
`during a crash thereby limiting motion of the seat frame
`and seat relative to the floor. A tether cable 90 is at-
`tached to and extends between floor 94 and base plate
`79 providing a further motion limitation of the seat
`during a crash.
`Retractor 29 is mounted atop and to seat frame 24
`which extends rearwardly of back support 23. Likewise,
`the opposite end 26 of the belt is secured to the seat
`frame. As a result, belt 25 moves as an integral portion
`of the seat whenever the seat is adjusted vertically or
`horizontally, thus maintaining constant pressure on the
`occupant. Likewise. retractor 53 mounted to the vehi-
`cle floor is operable to play out or retract belt 50 de-
`pending upon the vertical or horizontal controlled mo-
`tion of the seal which occurs, for example, during seat
`adjustment. During an emergency such as a crash, re-
`tractor 53 is operable to lock thereby applying holding
`force to the top end of the back portion of the scat
`minimizing seat motion and belt motion. During such an
`emergency, retractor 29 will likewise lock thereby pre-
`venting outward play of belt 25 and insuring the occu-
`pant is securely held to the seat. Notably, the restraining
`force exerted by belt 51] and retractor 53 relative to the
`seat is independent of any pressure applied to the occu-
`pant by belt 25 during emergency stops.
`Retractors 29 and 53 are inertia retractors and are
`commercially available. Such an inertia locking retrac-
`tor is disclosed in U.S. Pat. No. 4,506,844 which is here-
`with incorporated by reference.
`The sensitivity of the emergency locking retractor 29
`does not cause excessive lock up from the normal hori-
`zontal and vertical motion controlled by the occupant.
`That is, the retractor is operable only to lock the belt
`during emergency stops. Buckle 33 being affixed to
`frame 24 moves as a unit with belt 25 during seat motion
`providing for the integral relationship between the belt
`system and seat. Emergency locking retractor 53 is
`positioned low in the vehicle cab to minimize motion of
`belt 50 and reduce lock up in rough ride conditions. As
`such, retractor 53 is located lower in elevation than seat
`frame 24.
`Many advantages result from the present invention.
`Typically, in order to anchor conventional seats to a
`vehicle, various portions of the vehicle must be
`strengthened. By utilizing retractor 53 and belt 5|], the
`retractor and guide 54 may be mounted to the normal
`columns or strong areas of the vehicle eliminating the
`necessity for further reinforcement. Further, since the
`tether is attached to the location of the upper guide for
`belt 25, the upper torso is being tethered allowing for
`use of relatively inexpensive or unreinforced seats.
`While the invention has ‘been illustrated and de-
`scribed in detail in the drawings and foregoing descrip-
`tion, the sa.me is to be considered as illustrative and not
`restrictive in character, it being understood that only
`the preferred embodiment has been shown and de-
`scribed and that all changes and modifications that
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`come within the spirit of the invention are desired to be
`protected.
`What is claimed is:
`1. A tether for holding a vehicle passenger seat with
`a back portion comprising:
`a tether assembly mountable to a vehicle and a pas-
`senger seat therein, said tether assembly including
`an extendable and retractable web extending be-
`tween said passenger seat in said vehicle with said
`tether assembly being operable via said web to
`allow relative motion between said passenger seat
`in said vehicle during passenger adjustment but
`limiting relative motion during emergency stops,
`said tether assembly including an emergency look-
`ing retractor mounted to said vehicle with said web
`extendable and retractable from said emergency
`locking retractor, said web including an outer end
`portion secured to said back portion of said passen-
`ger seat, said tether assembly including web guide
`means positioned above said emergency locking
`retractor and behind said back portion, said web
`guide means operable to guide said web upwardly
`from said emergency locking retractor and for-
`wardly toward said back portion.
`2. A vehicle passenger restraint system comprising:
`a passenger seat movable mounted in a vehicle with
`said passenger seat having a upwardly extending
`back support;
`passenger belt means releasably extending across the
`passenger operable to secure the passenger in the
`seat; and,
`web means mounted to the vehicle and passenger seat
`and having a web releasably extending therefrom
`with said web including a first portion secured to
`said back support and a second portion secured to
`said vehicle, said web means operable to allow said
`web to extend and retract therefrom as said seat
`controllably moves relative to said vehicle but
`further operable to limit movement of said web and
`said back support relative to said vehicle during
`emergency stops; and wherein:
`said web means includes a web retractor mounted to
`said vehicle having said web wound therein; and,
`said passenger belt means includes a belt retractor
`mounted to said seat having a belt wound therein,
`said belt means with said belt retractor located on
`said seat to move with said seat maintaining con-
`stant pressure on said passenger as said seat moves
`relative to said vehicle whereas said web retractor
`is located on said vehicle limiting movement of said
`seat relative to said vehicle.
`3. The restraint system of claim 2 and further com-
`prising:
`web guide means mounted to said vehicle above said
`web retractor and behind said back support, said
`web guide means operable when said web is con-
`nected to said back support to guide said web up-
`wardly from said web retractor and then forwardly
`toward said back support.
`4. The restraint system of claim 3 wherein:
`said web guide means is movably mounted to said
`vehicle to allow vertical adjustment thereof rela-
`tive to said back support.
`5. The restraint system of claim 3 wherein:
`said passenger belt means includes a belt guide means
`mounted at an upper location on said back support,
`said belt extends upwardly from said belt retractor
`
`6
`freely through said belt guide means and then
`downwardly cross the chest of the passenger; and.
`said web is mounted to said back support at said
`upper location.
`6. The restraint system of claim 5 wherein:
`said belt includes an outer end portion fixed on one
`side of said seat, said passenger belt means includes
`a first locking means mounted on the opposite side
`of said seat and a second locking means mounted to
`said belt which is releasably matable with said first
`locking means, said belt extends from said one side
`across the lap of the passenger to said opposite side,
`then upwardly across the upper torso of the passen-
`ger to said belt guide means, then downwardly to
`said belt retractor which is operable to maintain
`- pressure on the lap and the upper torso while said
`web retractor maintains pressure on the back sup-
`port.
`7. A vehicle passenger restraint system comprising:
`a passenger seat movable mounted in a vehicle with
`said passenger seat having a upwardly extending
`back support;
`passenger belt means releasably extending across the
`passenger operable to secure the passenger in the
`seat;
`web means mounted to the vehicle and passenger seat
`and having a web releasably extending therefrom
`with said web including a first portion secured to
`said back support and a second portion secured to
`said vehicle, said web means operable to allow said
`web to extend and retract therefrom as said seat
`controllably moves relative to said vehicle but
`further operable to limit movement of said web and
`said back support relative to said vehicle during
`emergency stops; and,
`seat mounting means secured to and between said
`vehicle and said seat and operable to allow vertical
`and horizontal movement of said seat relative to
`said vehicle with said passenger belt means isolated
`from said movement maintaining constant pressure
`on the passenger whereas said web means extend-
`ing between said seat and vehicle independent of
`directly applying pressure to said passenger while
`being operable to limit movement of said seat dur-
`ing emergency stops.
`8. The restraint system of claim 7 wherein:
`said seat mounting means includes a support channel
`mounted to and beneath said seat, said channel
`includes a pair of lower mutually opposed and
`inwardly extending flanges, said seat mounting
`means further includes a base mounted to said vehi-
`cle and located within said channel immediately
`above said flanges which cooperatively with said
`base to limit vertical relative motion between said
`seat and said vehicle.
`9. The restraint system of claim 7 wherein:
`said seat mounting means includes a rearwardly ex-
`tending plate affixed to said seat, said seat mounting
`means further includes a post and slot combination
`provided on said plate and said base allowing lim-
`ited horizontal motion therebetween but securing
`said seat to said vehicle during an emergency stop.
`10. A seat integrated three point seat belt system
`comprising:
`a passenger seat rnovably mountable in a vehicle and
`including a seat portion and a back portion, said
`seat being normally movable during passenger
`adjustment;
`
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`8
`said tether means includes web guide means mounted
`to said vehicle above said emergency locking re-
`tractor and behind said back portion, said web
`guide means operable to guide said web upwardly
`from said emergency locking retractor and then
`forwardly toward said back portion.
`15. A tether for holding a vehicle passenger seat with
`a back portion comprising:
`_ a tether assembly mountable to a vehicle and a pas-
`senger seat therein, said tether assembly including
`““ °’“e“,dabl° and retractable .w°b °.’“e"d1.“3 bf?"
`tween said passenger seat and said vehicle with said
`‘ether asselnbly blimg operable ."a said web to
`allow relative motion between said passenger seat
`“Pd. laid Vehicle during passlmgcr adiuslmem but
`limiting relative motion during emergency stops:
`and wherein: said tether assembly includes an
`emergency locking retractor mounted to said vehi-
`cle with said web extendable arid retractable from
`said emergency locking retractor. said web in-
`cludes an outer end portion secured to said back
`portion of said passenger seat, said emergency
`locking retractor is mounted lower than said pas-
`seiiger seat. said tether assembly includes web
`guide means mounted to said vehicle above said
`emergency locking retractor and behind said back
`portion. said web guide means operable to guide
`said web upwardly from said emergency locking
`retractor and then forwardly toward said back
`panic-m,
`16. The tether of claim 15 wherein:
`said web guide means is movably mounted to said
`vehicle to allow for adjustment relative to said
`back portion of said passenger seat.
`*
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`a three point belt assembly including a belt retractor
`mounted to said passenger seat and further includ-
`ing a belt extendable therefrom, said assembly in-
`cludes a.n upper belt guide provided 011- said back
`portion and a releasable lock mounted to said pas-
`senger seat on one side thereof, said belt extending
`from said belt retraetor through said belt guide
`downwardly across the passenger to said lock and
`then back across the passenger being affiired to and
`on 3 side opposite to said one side; and’
`tether means mountable to said vehicle and said pas-
`sens“ “at said tether means including an emend_
`able and retractable web extending between said
`5 user seat and said vehicle with said ‘ether
`means being operable via said web to allow relative" '15
`.
`.
`.
`._
`":m:i°n.betw§:n said pasmngifl feat
`lfhl
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`um mg
`relatwe mono“ during emergeniw swpS'
`11.‘ The system '31. clam 10 wherein:
`said wager means (i1“‘:1“de,s‘d 3'“ he.":e"g°_“:y lacuna
`mtm‘;'j°Elm°u3te
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`131 The $Y5*¢0-'1 Of Claim 11 and fuflhfif °01nP"5mEf
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`and said outer end portion of said web secured 30
`lh€1’t‘-‘t0-
`13- The system Of Claim 12 wherein:
`said emergency locking retractor is mounted lower
`than said belt retractor.
`14. The system of claim 13 wherein:
`
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