Working head for a tree-shaping machine

Details Working head for a tree-shaping machine Working head for a tree-shaping machine

1988-12-29

1990-02-06

Bray, W. Donald

Woodworking

Special-work machine

144343, 173 8, A01G 2302

Patent

active

048982199

ABSTRACT:
A working head for a tree-shaping machine comprises drive means and at least one shaping unit comprising at least one mobile blade and an actuating jack (8, 9) for applying the blade to the surface of a tree. The pressure in the jacks is cancelled during the starting phase of the drive means.

REFERENCES:
patent: 3596690 (1971-08-01), Hamilton et al.
patent: 3606915 (1971-09-01), Lindblom
patent: 3690351 (1972-09-01), Strickland et al.
patent: 3797539 (1974-03-01), Moser et al.
patent: 3938566 (1976-02-01), Penfold et al.
patent: 4039010 (1977-08-01), Tucek
patent: 4440236 (1984-04-01), Shiihara et al.

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