IP Library › Granted Patent US 7,219,929
Granted Patent B2
US 7,219,929 · App. 10/874,911 · Granted May 22, 2007

Seat belt pretensioner

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Quick Facts
Patent No.
US 7,219,929
App. No.
10/874,911
Granted
May 22, 2007
Kind
B2
Abstract

A pretensioner for a three point vehicle safety restraint seat belt has a mounting for one end of the seat belt. The mounting has a first member fixed to a load bearing part of the vehicle and a second member attached to the end of the seat belt. A force reservoir, such as a pyrotechnic unit, moves the second member relative to the first member in a pretensioning direction in response to activation by a crash sensor.

Claims (15)

1. A pretensioner for a three point seat belt comprising:

a mounting for a sill end of the seat belt, the mounting comprising a first member adapted to be fixed to a load bearing part of a vehicle and a second member attached to the end of the seat belt, and a means for moving the second member translationally relative to the first member in a pretensioning direction when activated by a crash sensor, the first member comprising a means for restraining motion of the second member in a non-pretensioning direction, wherein the means for restraining motion of the second member comprises ratchet teeth formed in a surface of a rail.

2. The pretensioner according to claim 1 wherein the mounting further comprises a slider bar connecting the second member to the end of the seat belt.

3. The pretensioner according to claim 1 wherein the load bearing part comprises a sill anchorage.

4. The pretensioner according to claim 2 wherein the load bearing part comprises a sill anchorage.

5. The pretensioner according to claim 1 wherein the means for moving the second member comprises a force reservoir.

6. The pretensioner according to claim 2 wherein the means for moving the second member comprises a force reservoir.

7. The pretensioner according to claim 5 wherein the means for moving further comprises a piston connected to the second member and a cylinder housing the piston such that activation of the force reservoir drives the piston along the cylinder.

8. The pretensioner according to claim 6 wherein the means for moving further comprises a piston connected to the second member and a cylinder housing the piston such that activation of the force reservoir drives the piston along the cylinder.

9. The pretensioner according to claim 7 wherein the piston and cylinder are located below the first member.

10. The pretensioner according to claim 8 wherein the piston and cylinder are located below the first member.

11. The pretensioner according to claim 5 wherein the force reservoir comprises a gas generator that is pyrotechnically activated.

12. The pretensioner according to claim 6 wherein the force reservoir comprises a gas generator that is pyrotechnically activated.

13. The pretensioner according to claim 1 wherein the load bearing part of the vehicle is a longitudinal chassis member.

14. The pretensioner according to claim 1 wherein the crash sensor is activated when the vehicle exceeds a predetermined acceleration or deceleration threshold.

Assignments (7)
RELEASE OF SECURITY INTEREST Recorded Oct 12, 2021
From: DEUTSCHE BANK TRUST COMPANY AMERICAS, AS SECURITY AGENT FOR THE SECURED PARTIES
To: KEY SAFETY SYSTEMS, INC.
Reel/Frame 057775/0771 →
RELEASE OF INTEREST IN PATENTS- RELEASE OF REEL/FRAME 033673/0524 Recorded Apr 12, 2018
From: UBS AG, STAMFORD BRANCH
To: KEY SAFETY SYSTEMS, INC.; KSS HOLDINGS, INC.; KSS ACQUISITION COMPANY; BREED AUTOMOTIVE TECHNOLOGY, INC.; KEY ASIAN HOLDINGS, INC.; KEY AUTOMOTIVE ACCESSORIES, INC.; KEY AUTOMOTIVE OF FLORIDA, LLC; KEY CAYMAN GP LLC; KEY INTERNATIONAL MANUFACTURING DEVELOPMENT CORPORATION; KEY SAFETY RESTRAINT SYSTEMS, INC.; KEY SAFETY SYSTEMS FOREIGN HOLDCO, LLC
Reel/Frame 045933/0563 →
INTELLECTUAL PROPERTY SECURITY AGREEMENT SUPPLEMENT Recorded Apr 11, 2018
From: KEY SAFETY SYSTEMS, INC.
To: DEUTSCHE BANK TRUST COMPANY AMERICAS
Reel/Frame 045927/0330 →
RELEASE OF INTEREST IN PATENT COLLATERAL Recorded Sep 2, 2014
From: UBS AG, STAMFORD BRANCH
To: KEY SAFETY SYSTEMS, INC.; KSS HOLDINGS, INC.; KSS ACQUISITION COMPANY; BREED AUTOMOTIVE TECHNOLOGY, INC.; HAMLIN INCORPORATED; KEY ASIAN HOLDINGS, INC.; KEY AUTOMOTIVE ACCESSORIES, INC.; KEY AUTOMOTIVE WEST, INC.; KEY AUTOMOTIVE, LP; KEY CAYMAN GP LLC; KEY ELECTRONICS OF NEVADA, INC.; KEY INTERNATIONAL MANUFACTURING DEVELOPMENT CORPORATION; KEY SAFETY RESTRAINT SYSTEMS, INC.; KEY SAFETY SYSTEMS FOREIGN HOLDCO, LLC; KEY SAFETY SYSTEMS OF TEXAS, INC.
Reel/Frame 033666/0605 →
PATENT SECURITY AGREEMENT Recorded Sep 2, 2014
From: KEY SAFETY SYSTEMS, INC.
To: UBS AG, STAMFORD BRANCH
Reel/Frame 033673/0524 →
SECURITY AGREEMENT Recorded May 16, 2007
From: KEY SAFETY SYSTEMS, INC; KSS HOLDINGS, INC; KSS ACQUISITION COMPANY; AEGIS KEY CORP; BREED AUTOMOTIVE TECHNOLOGY, INC; HAMLIN INCORPORATED; KEY ASIAN HOLDINGS, INC; KEY AUTOMOTIVE ACCESSORIES, INC; KEY AUTOMOTIVE OF FLORIDA, INC; KEY AUTOMOTIVE WEST, INC; KEY AUTOMOTIVE, LP; KEY CAYMAN GP LLC; KEY ELECTRONICS OF NEVADA, INC; HAMLIN ELECTRONICS LIMITED PARTNERSHIP; KEY INTERNATIONAL MANUFACTURING DEVELOPMENT CORPORATION; KEY SAFETY RESTRAINT SYSTEMS, INC; KEY SAFETY SYSTEMS FOREIGN HOLDCO, LLC; KEY SAFETY SYSTEMS OF TEXAS, INC
To: CITICORP USA, INC.
Reel/Frame 019297/0249 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jun 24, 2004
From: BELL, JOHN; JACK, BRIAN A.; HUNTER, DAVID
To: KEY SAFETY SYSTEMS, INC.
Reel/Frame 015513/0405 →