Knife blades and method of making said knife blades

Details Knife blades and method of making said knife blades Knife blades and method of making said knife blades

1986-12-03

1989-08-22

Yost, Frank T.

Cutlery

Blades

Edge structure

30355, 128305, B26B 902

Patent

active

048583243

ABSTRACT:
The disclosure relates to knife blades for precision cutting, such as in optical surgery, wherein the blade or cutting edge is formed from a molded plastic filled with particulate material which is much harder than the plastic, the particles of particulate material being generally smaller in their largest dimension than the radius of curvature of the apex of the cutting edge. A thin coating of a metal which is much harder than the filled plastic is coated onto the cutting edge to replicate the molded shape and provide substantial additional hardness to the blade edge. In a further embodiment, a transducer is molded into the blade body adjacent the edge with all processing steps being at temperatures below those harmful to the transducer. Another embodiment provides light conducting elements molded into the blade body for measurement of cut depth or the like. A further embodiment provides capillary tubes from the blade interior to its surface with provision for transmission of fluid under pressure from the blade interior to the surface. A still further embodiment provides a wire molded into the blade body and contacting the metal coating at or near the blade edge to form a thermocouple therewith for temperature measurement.

REFERENCES:
patent: 3597844 (1971-08-01), Messinger
patent: 3786814 (1974-01-01), Armao
patent: 4016761 (1977-04-01), Rozzell et al.
patent: 4248231 (1981-02-01), Henczog et al.
patent: 4253469 (1981-03-01), Aslan
patent: 4402311 (1983-09-01), Hattori
patent: 4502487 (1985-03-01), DuBrucq et al.
Tamura et al., "Noncontact Transducer for Monitoring Blood Temperature During Extracorporeal Circulation", published in `Medical Instrumentation`, vol. 14, No. 2, Mar. 1980, pp. 107-110.

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