Transformer unit

Woodworking – Special-work machine – Combined

Reexamination Certificate

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Details

C144S034100, C418S133000

Reexamination Certificate

active

07114537

ABSTRACT:
A transformer unit for sawing, wherein the transformer unit comprises: a first machine element for performing a continuous rotational motion, and a second machine element for performing a limited alternating rotational motion, wherein the transformer unit can be coupled to an arrangement supplying driving energy for the transformer unit, wherein the first and the second machine elements are coupled to a chain saw with a guide bar, wherein the first machine element is for rotating the chain saw, wherein the second machine element is for feeding the guide bar and for returning the guide bar to the starting point of the sawing after the sawing. The second machine element is a wing torsion device operated by pressurized medium, comprising an annular space for the pressurized medium.

REFERENCES:
patent: 3196934 (1965-07-01), Sneen et al.
patent: 3244111 (1966-04-01), Shelhart
patent: 3356113 (1967-12-01), Perugia
patent: 3565372 (1971-02-01), Jones
patent: 4989652 (1991-02-01), Hansson
patent: 5201350 (1993-04-01), Milbourn
patent: 5290155 (1994-03-01), Snow et al.
patent: 5390715 (1995-02-01), Luscombe
patent: 5802946 (1998-09-01), Leini
patent: 5908060 (1999-06-01), Fargeot
patent: 6041683 (2000-03-01), Timperi et al.
patent: 6158322 (2000-12-01), Ornberg
patent: 3146695 (1983-07-01), None
patent: 457436 (1988-12-01), None
patent: 736911 (1980-05-01), None
patent: WO 98/53666 (1998-12-01), None

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