Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
146 words
A seat belt tightening system adapted to be used in conjunction with a vehicle seat whose position can be adjusted, comprising: a deceleration sensor mounted on a vehicle body for detecting deceleration exceeding a threshold level indicative of a vehicle crash; a drive unit mounted on said vehicle body for producing drive power in response to detection of deceleration exceeding said threshold level by said deceleration sensor; a seat belt tightening unit mounted on said vehicle seat for applying tension to a seat belt with said drive power supplied from said drive unit; and drive power transmitting means for transmitting said drive power from said drive unit to said seat belt tightening unit, said drive power transmitting means being provided with coupling means for transmitting said drive power from said drive unit to said seat belt tightening unit without interfering with adjustment movement of said seat.
Claim 2
Dependent Claim
146 words
A seat belt tightening system adapted to be used in conjunction with a vehicle seat whose position can be adjusted, comprising: a deceleration sensor mounted on a vehicle body for detecting deceleration exceeding a threshold level indicative of a vehicle crash; a drive unit mounted on said vehicle body for producing drive power in response to detection of deceleration exceeding said threshold level by said deceleration sensor; a seat belt tightening unit mounted on said vehicle seat for applying tension to a seat belt with said drive power supplied from said drive unit; and drive power transmitting means for transmitting said drive power from said drive unit to said seat belt tightening unit, said drive power transmitting means being provided with coupling means for transmitting said drive power from said drive unit to said seat belt tightening unit without interfering with adjustment movement of said seat.
Claim 3
Dependent Claim
24 words
A seat belt tightening system according to claim 1, wherein said deceleration sensor and said drive unit are formed as a single sub assembly.
Claim 4
Dependent Claim
97 words
A seat belt tightening system according to claim 1, wherein said drive power consists of rotary drive power, and said drive power transmitting means comprises a rotary rod, having a non-circular cross section and extending in a direction of possible adjustment movement of said seat, which is slidably fitted into an opening provided in a power output end of said drive unit to receive said rotary rod so that said rotary had may be freely slidable along its axial direction able but to rotate in unison with respect to said power output end of said drive unit.
Claim 5
Dependent Claim
48 words
A seat belt tightening system according to claim 1, wherein said drive power consists of rotary drive power, and said drive power transmission means comprises a centrifugal clutch which becomes engaged only when the rotational speed of output of said drive unit is higher than a certain level.
Claim 6
Dependent Claim
44 words
A seat belt tightening system according to claim 1, wherein said seat belt retractor unit is mounted on an inner side of one of a pair of laterally arranged seats, and said drive unit is mounted on a floor tunnel extending between said seats.
Claim 7
Dependent Claim
74 words
A seat belt tightening system according to claim 1, wherein said drive power consists of rotary drive power, and said seat belt tightening unit consists of a retractor unit having a winding pulley which is adapted to be rotated in case of a vehicle crash, said drive power transmission means comprising a centrifugal clutch which becomes engaged only when the rotational speed of output of said drive unit is higher than a certain level.