Hollow drill for fabric and the like

Details Hollow drill for fabric and the like Hollow drill for fabric and the like

1988-07-27

1992-03-24

Schwartz, Larry I.

Cutting by use of rotating axially moving tool

Tool or tool with support

Having axial, core-receiving central portion

408205, 761081, B23B 5100

Patent

active

050982346

ABSTRACT:
A hollow drill for fabric and the like is comprised of a hollow shaft having highly polished inside and outside surfaces and an outside diameter of preferably not more than 0.130 inches. A tip having a larger outside diameter and smaller inside diameter is brazed or soldered to the shaft. The shaft is made by a continuous manufacturing method such as extrusion and the tip is machined or molded followed by finish machining.

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patent: 464252 (1891-12-01), Knoepfel et al.
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patent: 1557464 (1925-10-01), Mick
patent: 2191493 (1940-02-01), Reilly
patent: 2354656 (1944-08-01), Annesley
patent: 2688264 (1954-09-01), Rudquist
patent: 3512519 (1970-05-01), Hall
patent: 3617145 (1971-11-01), Celmer
patent: 4632611 (1986-12-01), Burns
patent: 4767244 (1988-08-01), Peterson

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