Surface referenced depth control

Details Surface referenced depth control Surface referenced depth control

1997-03-11

2000-03-21

Howell, Daniel W.

Gear cutting, milling, or planing

Milling

With limit means to aid in positioning of cutter bit or work

408 14, 408 97, 408241S, B23B 4900

Patent

active

060395184

ABSTRACT:
The subject invention controls the penetration of a drill or router into a cutting surface by preventing excessive downward travel by a spindle once a preset depth is reached. This is achieved by placing a mechanical stop on the pressure foot linkage and providing a compression means to absorb the excessive downward travel. The compression can be absorbed within the select cylinder volume by reducing operating pressure appropriately, or within an added compression cylinder, or by a compression spring.

REFERENCES:
patent: 4330052 (1982-05-01), Schymick
patent: 4749314 (1988-06-01), Leblond
patent: 4909683 (1990-03-01), Vershowske et al.
patent: 5087156 (1992-02-01), Kanaya et al.
patent: 5127775 (1992-07-01), Broadbent et al.
patent: 5286147 (1994-02-01), Escobedo et al.
patent: 5308198 (1994-05-01), Pumphrey

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