Gear cutting – milling – or planing – Milling – Randomly manipulated – work supported – or work following device
Patent
1993-11-02
1995-06-27
Bilinsky, Z. R.
Gear cutting, milling, or planing
Milling
Randomly manipulated, work supported, or work following device
30475, 144117C, B27C 110
Patent
active
054274834
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to an electric hand plane with a planing depth adjuster.
More particularly it relates to an electric hand plane which has a wedge-shaped body with a lower surface resting on a workpiece and an plane housing supported on an upper wedge surface and a device producing a clamping force between the upper wedge surface and a counter-surface of the plane housing.
A hand plane of the generic type is known from U.S. Pat. No. 4,555,850. Its planing depth adjusting device with planing depth indicator is formed by a single handle coupled with a wedge-shaped body which can slide back and forth at the underside of the hand plane which has the form of an oblique plane. The problem of adjusting the planing depth is solved in this hand plane in a relatively simple way and in an economical manner in terms of design and manufacture. However, this hand plane has the disadvantage that an accurate adjustment of the planing depth requires a relatively sensitive touch and is time consuming.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the present invention to provide an electric hand plane with a planing depth adjuster, which avoids the disadvantages of the prior art.
In keeping with these objects and with others which will become apparent hereinafter, one feature of the present invention resides, briefly stated, in an electric hand plane of the above mentioned type having a single handle, wherein the handle displaces the wedge-shaped body relative to the plane housing via gear mechanism parts, in particular by rotation.
When the electric hand plane is designed in accordance with the present invention, it has the advantage over the prior art that the planing depth can be adjusted quickly in a particularly exact and controlled manner.
The improved convenience increases the use value of the hand plane to such a considerable extent that the increased design and manufacturing cost is negligible.
In accordance with another feature of the present invention the gear mechanism parts are moved relative to one another by rotating the handle around the axis. The gear mechanism parts can include at least one toothed rack which is arranged preferably to be stationary in the interior of the plane housing, and a toothed wheel which meshes with the latter and is supported to be rotatable in the wedge-shaped body.
The handle can carry a toothed rim which is fixed with respect to rotation relative to it and meshes with an edge region of the recess in the form of a toothed rack. The handle can simultaneously serve as an auxiliary handle which projects upward out over the plane housing and follows the movement of the wedge-shaped body, and the wedge-shaped body can be held at the plane housing without play by the force of at least one spring.
The handle, and/or the wedge shaped body can be arranged at opposite ends of the axle to be rotatable and springing in the axial direction so that the handle and the wedge-shaped body tend toward one another and clamp the plane housing between them.
The novel features which are considered as characteristic for the invention are set forth in particular in the appended claims. The invention itself, however, both as to its construction and its method of operation, together with additional objects and advantages thereof, will be best understood from the following description of specific embodiments when read in connection with the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 shows a side view of a hand plane according to the invention;
FIG. 2 shows a sectional view from the side of the front region of the hand plane;
FIG. 3 shows a top view of this region of the hand plane.
DESCRIPTION OF THE PREFERRED EMBODIMENT
FIG. 1 shows the construction of an embodiment example of a hand plane 1 having a plane housing 2 with a main handle 3 in which an on/off switch 4 is arranged. An electric cable 5 leading out of the rear area of the hand plane 1 is connected in the interior of the hand plane housing 2 with an electric motor w
REFERENCES:
patent: 2600279 (1952-06-01), Spitzley
patent: 3407857 (1968-10-01), Bentley
patent: 4360048 (1982-11-01), Schadlich et al.
patent: 4382729 (1983-05-01), Bachmann
patent: 4555850 (1985-12-01), Frech
patent: 4693648 (1987-09-01), Cavedo
Braunbach Karl-Heinz
Flottmann Kai-Uwe
Hild Eugen
Wunsch Steffen
Bilinsky Z. R.
Robert & Bosch GmbH
Striker Michael J.
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