GB1438929A – Tensioning devices
– Google Patents
GB1438929A – Tensioning devices
– Google Patents
Tensioning devices
Info
Publication number
GB1438929A
GB1438929A
GB5385974A
GB5385974A
GB1438929A
GB 1438929 A
GB1438929 A
GB 1438929A
GB 5385974 A
GB5385974 A
GB 5385974A
GB 5385974 A
GB5385974 A
GB 5385974A
GB 1438929 A
GB1438929 A
GB 1438929A
Authority
GB
United Kingdom
Prior art keywords
piston
cylinder
belt
chamber
damping
Prior art date
1973-12-20
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.)
Expired
Application number
GB5385974A
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.)
Societe Nationale des Poudres et Explosifs
Original Assignee
Societe Nationale des Poudres et Explosifs
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.)
1973-12-20
Filing date
1974-12-12
Publication date
1976-06-09
1974-12-12
Application filed by Societe Nationale des Poudres et Explosifs
filed
Critical
Societe Nationale des Poudres et Explosifs
1976-06-09
Publication of GB1438929A
publication
Critical
patent/GB1438929A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
B—PERFORMING OPERATIONS; TRANSPORTING
B60—VEHICLES IN GENERAL
B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
B60R22/00—Safety belts or body harnesses in vehicles
B60R22/18—Anchoring devices
B60R22/195—Anchoring devices with means to tension the belt in an emergency, e.g. means of the through-anchor or splitted reel type
B60R22/1954—Anchoring devices with means to tension the belt in an emergency, e.g. means of the through-anchor or splitted reel type characterised by fluid actuators, e.g. pyrotechnic gas generators
B60R22/1955—Linear actuators
B—PERFORMING OPERATIONS; TRANSPORTING
B60—VEHICLES IN GENERAL
B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
B60R22/00—Safety belts or body harnesses in vehicles
B60R22/34—Belt retractors, e.g. reels
B60R22/46—Reels with means to tension the belt in an emergency by forced winding up
B60R22/4628—Reels with means to tension the belt in an emergency by forced winding up characterised by fluid actuators, e.g. pyrotechnic gas generators
B60R2022/4657—Reels with means to tension the belt in an emergency by forced winding up characterised by fluid actuators, e.g. pyrotechnic gas generators comprising a plurality of charges
B—PERFORMING OPERATIONS; TRANSPORTING
B60—VEHICLES IN GENERAL
B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
B60R22/00—Safety belts or body harnesses in vehicles
B60R22/28—Safety belts or body harnesses in vehicles incorporating energy-absorbing devices
Abstract
1438929 Tightening seat belts SOC NATIONALE DES POUDRES ET EXPLOSIFS 12 Dec 1974 [20 Dec 1973] 53859/74 Heading A3V [Also in Division F2] A seat belt is tightened by a piston moved within a cylinder by release of high pressure gas triggered by an impact detector. At a predetermined stress a link between belt and piston fractures and activates a jamming mechanism preventing further advance of the piston. Forward movement of the wearer is damped as the gas is compressed by return of the piston. The belt is attached to the inner part 14 of a buckle, fixed to the inner member 15 of a rod 3. Outer part 17 of the buckle is fixed to an outer member 20. The head 61 of the inner member includes an easily fractured neck 62, and abuts the end of the outer member 20. The end of the rod 3 is attached to a piston, generally indicated by 7 movable within a cylinder 8 held in casing 5 by a frangible screw 10a. Ignitable pyrotechnic charges 11 are housed in damping chamber 23, which communicates via parts 50 with expansion chamber 23. When the charges are ignited piston 7 is driven to the right, tightening the belt, until neck 62 fractures. Further movement of the piston in that direction is then prevented. In the embodiment shown, head 61 is projected by spring 63 and forces rods 60 radially outwards. A ring 59 thereby jams balls 58 be tween conical surface 64 of the piston and the inner surface of the cylinder 8. In a modifications (Figures 7, 8 not shown) the ring is moved by pivoted levers (74), or pressure of the gas passing through the fractured head and passages (88, 92-94) in the piston. Continued forward movement of the wearer against the belt withdraws the piston to its initial position. Fracture of screw 10a releases the cylinder 8 so the damping is continued as gas is compressed in chamber 23. The chamber vents via valve 28 at a predetermined pressure. In a modification (Figure 7 not shown) cylinder 8 moves in an outer cylinder (8a) which is released to prolong damping when a retaining ring (66) fractures. Figure 8 (not shown) shows a residual damping chamber (77) replacing the valve.
GB5385974A
1973-12-20
1974-12-12
Tensioning devices
Expired
GB1438929A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
FR7345838A
FR2255783A1
(en)
1973-12-20
1973-12-20
Publications (1)
Publication Number
Publication Date
GB1438929A
true
GB1438929A
(en)
1976-06-09
Family
ID=9129553
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB5385974A
Expired
GB1438929A
(en)
1973-12-20
1974-12-12
Tensioning devices
Country Status (4)
Country
Link
DE
(1)
DE2460636A1
(en)
FR
(1)
FR2255783A1
(en)
GB
(1)
GB1438929A
(en)
IT
(1)
IT1027128B
(en)
Cited By (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
EP1431137A1
(en)
*
2002-12-20
2004-06-23
Pyroalliance
Safety belt pretensioner
Families Citing this family (2)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
DE2540952C2
(en)
*
1975-09-13
1984-08-16
Volkswagenwerk Ag, 3180 Wolfsburg
Belt tensioning device for a seat belt
DE2624942C2
(en)
*
1976-06-03
1985-12-12
Boge Gmbh, 5208 Eitorf
Device for tensioning and controlled releasing of seat belts
1973
1973-12-20
FR
FR7345838A
patent/FR2255783A1/fr
not_active
Withdrawn
1974
1974-12-12
GB
GB5385974A
patent/GB1438929A/en
not_active
Expired
1974-12-19
IT
IT7069274A
patent/IT1027128B/en
active
1974-12-20
DE
DE19742460636
patent/DE2460636A1/en
active
Pending
Cited By (2)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
EP1431137A1
(en)
*
2002-12-20
2004-06-23
Pyroalliance
Safety belt pretensioner
FR2848950A1
(en)
*
2002-12-20
2004-06-25
Pyroalliance
CONSTANT EFFECT BELT RETRACTOR
Also Published As
Publication number
Publication date
DE2460636A1
(en)
1975-07-10
IT1027128B
(en)
1978-11-20
FR2255783A1
(en)
1975-07-18
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(en)
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Legal Events
Date
Code
Title
Description
1976-10-20
PS
Patent sealed
1981-07-22
PCNP
Patent ceased through non-payment of renewal fee
