FR2306376A1 - Shock absorber for vehicle safety belts - using gases from pyrotechnic charge to apply restraining tension and act as buffer - Google Patents

Shock absorber for vehicle safety belts - using gases from pyrotechnic charge to apply restraining tension and act as buffer

Info

Publication number
FR2306376A1
FR2306376A1 FR7413981A FR7413981A FR2306376A1 FR 2306376 A1 FR2306376 A1 FR 2306376A1 FR 7413981 A FR7413981 A FR 7413981A FR 7413981 A FR7413981 A FR 7413981A FR 2306376 A1 FR2306376 A1 FR 2306376A1
Authority
FR
France
Prior art keywords
gases
shock absorber
pyrotechnic charge
act
buffer
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
FR7413981A
Other languages
French (fr)
Other versions
FR2306376B1 (en
Inventor
Bernard Pech
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.)
Filing date
Publication date
Application filed by Societe Nationale des Poudres et Explosifs filed Critical Societe Nationale des Poudres et Explosifs
Priority to FR7413981A priority Critical patent/FR2306376A1/en
Publication of FR2306376A1 publication Critical patent/FR2306376A1/en
Application granted granted Critical
Publication of FR2306376B1 publication Critical patent/FR2306376B1/fr
Granted legal-status Critical Current

Links

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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/02—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum
    • F16F9/0209—Telescopic
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Damping Devices (AREA)

Abstract

The shock absorber has an outer casing with three pistons inside. A pyrotechnic charge is placed in the space between the two inner pistons. This is fired and the gases pass through holes to move the innermost piston rapidly inside the second and apply tension to the safety belt. The gases also pass through smaller holes onto the outer piston and hold this firmly. Reaction against belt tension breaks a shear bolt and operates spring loaded levers. These apply balls against an O ring and lock the inner pistons together. The gases are then used to absorb strain and shocks.
FR7413981A 1974-04-23 1974-04-23 Shock absorber for vehicle safety belts - using gases from pyrotechnic charge to apply restraining tension and act as buffer Granted FR2306376A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7413981A FR2306376A1 (en) 1974-04-23 1974-04-23 Shock absorber for vehicle safety belts - using gases from pyrotechnic charge to apply restraining tension and act as buffer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7413981A FR2306376A1 (en) 1974-04-23 1974-04-23 Shock absorber for vehicle safety belts - using gases from pyrotechnic charge to apply restraining tension and act as buffer

Publications (2)

Publication Number Publication Date
FR2306376A1 true FR2306376A1 (en) 1976-10-29
FR2306376B1 FR2306376B1 (en) 1977-10-21

Family

ID=9137964

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7413981A Granted FR2306376A1 (en) 1974-04-23 1974-04-23 Shock absorber for vehicle safety belts - using gases from pyrotechnic charge to apply restraining tension and act as buffer

Country Status (1)

Country Link
FR (1) FR2306376A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0911229A3 (en) * 1997-10-14 2002-03-27 Breed Automotive Technology, Inc. Safety restraint
EP2671764A4 (en) * 2011-02-01 2013-12-11 Ashimori Ind Co Ltd Pretensioner device and seat belt device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0911229A3 (en) * 1997-10-14 2002-03-27 Breed Automotive Technology, Inc. Safety restraint
EP1336540A1 (en) * 1997-10-14 2003-08-20 Breed Automotive Technology, Inc. Safety restraint
EP2671764A4 (en) * 2011-02-01 2013-12-11 Ashimori Ind Co Ltd Pretensioner device and seat belt device
EP2671764A1 (en) * 2011-02-01 2013-12-11 Ashimori Industry Co., Ltd. Pretensioner device and seat belt device

Also Published As

Publication number Publication date
FR2306376B1 (en) 1977-10-21

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Legal Events

Date Code Title Description
ST Notification of lapse