EP0059643B1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Dual spool pre-tensioner
Assignee: ZF Passive Safety Systems US Inc
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Filing: 1982-03-02
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Granted: 1985-05-29
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Expires: 2002-03-02
Abstract
No abstract record available.
Inventors
- 👤 Charles Gemar
- 👤 Robert L. Meisch
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 11:05
CPC Classifications
A; A62; A62B; A62B35/00; B; B60; B60R; B60R22/00; B60R22/34; B60R22/46; B60R22/4628; B60R22/4633; B65; B65H; B65H75/00; B65H75/02; B65H75/34; B65H75/38; B65H75/44; B65H75/48; B60R2022/3424; B60R22/4604; B60R2022/4614
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
84 words
A pre-tensioner (12) for a dual spool safety belt retractor (13) comprising a pair of spaced-apart generally parallel shafts (17) characterized by a case (12a) attachable to a dual spool retractor frame (13a) and adapted to receive portions (23) of the shafts (17), a chamber (30) in the case having pyrotechnic means (33) removably inserted therein, and piston means (29) co-operating with the chamber for movement between and in contact with the said portions of the shafts whereby, upon linear movement of the piston
Claim 2
Dependent Claim
84 words
A pre-tensioner (12) for a dual spool safety belt retractor (13) comprising a pair of spaced-apart generally parallel shafts (17) characterized by a case (12a) attachable to a dual spool retractor frame (13a) and adapted to receive portions (23) of the shafts (17), a chamber (30) in the case having pyrotechnic means (33) removably inserted therein, and piston means (29) co-operating with the chamber for movement between and in contact with the said portions of the shafts whereby, upon linear movement of the piston
Claim 3
Dependent Claim
34 words
means, the shafts are rotated.-2. A pre-tensioner according to claim 1, characterized in that the piston means (29) is supported for movement with an interference fit between knurled sections (23) on the shafts (17).
Claim 4
Dependent Claim
34 words
A pre-tensioner according to claim 2, characterized in that at least a portion (38, 39) of the piston means (29) is deformable in contact with the knurled sections (23) of the said shafts (17).
Claim 5
Dependent Claim
43 words
A pre-tensioner according to claim 1, 2 or 3 characterized in that a shear pin (44) secures the piston means (29) in the case whereby the piston means is normally held out of contact with the said portions (23) of the shafts (17).
Claim 6
Dependent Claim
29 words
A pre-tensioner according to any of claims 1 to 4, characterized in that the piston means (29) comprises a block formed with a cavity aligned with the chamber (30).
Claim 7
Dependent Claim
16 words
A dual spool belt retractor characterized by a pre-tensioner according to any of the preceding claims.
References Cited (Backward Citations)
No citation records indexed.
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