Shield advancing machine
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 21, 1989
Grant Date -
N/A
app pub date -
Oct 1, 1986
filing date -
Oct 14, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A shield advancing machine, comprising cutting tools (15) rotatably supported on cantilever arms (13, 14) being rotatable around an axis approximately extending in advancing direction and being swivellable in transverse direction to this axis, has a carrier (4) which is guided and supported in axial direction of the shield (1). A rotation drive (22, 33) for a rest (9) of the cantilever arms (13, 14) is provided on the carrier (4), and the cantilever arms (13, 14) as well as their swivel drive (16, 17) are linked to the rest (9).
First Claim
Family
International Classification(s)
- Non-US Classification not provided for expired patents
Cited Art Landscape
Patent Citation Ranking
- Citation Ranking not provided for expired patents
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