Device for punching holes in tubing

Details Device for punching holes in tubing Device for punching holes in tubing

1979-09-17

1981-05-26

Schran, Donald R

Cutting

By tool inside hollow work

One tool having only rectilinear motion

83257, 83277, 83278, B26D 524, B21D 2828

Patent

active

042690943

ABSTRACT:
A punching apparatus, particularly a device for longitudinally advancing, while punching, a series of longitudinally aligned ports in cylindrical tubing of the type used in gas burners. The apparatus is distinguished by its employment of a single drive system for advancing and punching, together with adjustments for varying the height of the tubing, the depth of the punched port, and the longitudinal spacing between ports.

REFERENCES:
patent: 1250028 (1917-12-01), Schadow
patent: 1566082 (1925-12-01), Dubins
patent: 2404901 (1947-07-01), Cibs
patent: 2829983 (1958-04-01), De Gain
patent: 3086571 (1963-04-01), Cooper
patent: 3171312 (1965-03-01), Fuchs et al.
patent: 3698274 (1972-10-01), Coulon et al.
patent: 3771400 (1973-11-01), Schaefer

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