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Inventor: Desmoulins; Jean-Claude
Address: Conflans-Sainte-Honorine, FR
No. of patents: 1
Patents:
| Patent Number |
Title Of Patent |
Date Issued |
| 4074890 |
Multi-stage hydraulic stretcher for elongated fasteners |
February 21, 1978 |
| Hydraulic device for exerting a pre-stressing traction on bolts or pins comprises three stages, with each stage comprising a piston within a chamber. The thickness of the skirts of the piston increases from stage to stage in proportion to the pressure to which the piston of that stage is |
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