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 Title: |
US5849017:
Moulded plastic obstetric forceps
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Reynolds, J. Lawrence; London, Canada
Kurowski, Paul M.; London, Canada
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| Assignee: |
The University of Western Ontario Stevenson-Lawson Building, London, Canada
other patents from UNIVERSITY OF WESTERN ONTARIO (600120) (approx. 28)
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| Published / Filed: |
1998-12-15
/ 1996-09-19
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| Application Number: |
US1996000715824
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| IPC Code: |
Advanced:
A61B 17/44;
IPC-7:
A61G 17/42;
A61G 17/46;
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| ECLA Code: |
A61B17/44; K61B17/44L;
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| U.S. Class: |
Current:
606/122;
606/119;
606/205;
606/206;
Original:
606/122;
606/119;
606/205;
606/206;
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| Field of Search: |
606/122,119,120,124,121,205,206,208
081/319,320,341,417
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| Priority Number: |
| 1996-09-19 |
US1996000715824 |
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| Abstract: |
Obstetric forceps have a pair of elongated members, each having a blade at one end, a handle at an opposite end and a shank connecting the blade and handle. The members pivotally engage each other at a pivot point intermediate their ends and freely moveable when so engaged. The blades and shanks of each of the members are resiliently constructed to exert a traction force within a preset margin of safety and to slip when the preset margin of safety is exceeded.
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| Attorney, Agent or Firm: |
Gowling, Strathy & Henderson ;
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| Primary / Asst. Examiners: |
Apley, Richard J.; Yu, Justine R.
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| Maintenance Status: |
E2 Expired Check current status
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| INPADOC Legal Status: |
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| Family: |
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First Claim:
Show all 8 claims |
We claim:
1. Obstetric forceps comprising:
- a pair of elongate members, each of which has a blade at one end, a handle at an opposite end and a shank connecting said blade and handle, said members pivotally engaging each other at a pivot point intermediate their ends, each said blade having a blade tip distal said handle and said members being sized and constructed of a resilient material such that resilient deflection of the blade tip relative to the pivot point occurs when a pressure load is applied to said blades as they are closed on a head of a baby, said deflection being in the range of from about 0.3 mm/N to about 0.9 mm/N to allow the blades to slip off said head of a baby during traction thereof if said pressure load exceeds a preset margin of safety.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 4 U.S. patent(s) that reference this one
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