Thin footplate rongeur

Details Thin footplate rongeur Thin footplate rongeur

1989-01-13

1991-02-05

Hafer, Robert A.

Surgery

Instruments

Orthopedic instrumentation

606 79, 606170, A61B 1716

Patent

active

049901486

ABSTRACT:
A rongeur with special features applied to the footplate area to prevent the intersection of stress fields to allow the rongeur to be reduced in size and mass without materially reducing the strength of the rongeur. A transverse groove is used at the intersection of the anvil surface of the base plate and the shank base plane. Also the base of the footplate recess is offset from the shank base plane and the inside wall of the recess meets the recess base in a gentle curve. These features can be used individually or together to prevent the intersection of stress fields in the footplate area and thus allow the size of the footplate to be reduced without materially reducing the strength of the rongeur.

REFERENCES:
patent: 1040523 (1912-10-01), De Vilbiss
patent: 3752161 (1973-08-01), Bent
patent: 3835860 (1974-09-01), Garretson
patent: 4499899 (1985-02-01), Lyons, III
patent: 4586497 (1986-05-01), Papra et al.
patent: 4777948 (1988-10-01), Wright

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