US 5,678,292 AGranted

Hand-held machine for sanding having swash plate oscillation means

OwnerErich Kimbel, Jill Taylor +1inventors

InventorsErich Kimbel, Jill Taylor, Gerd Buchter

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Abstract

A hand-held machine tool for a workpiece, comprising a casing having first and second hollows therein, an electric motor enclosed in said first hollow and having a driving shaft, a driving mechanism accommodated in said second hollow and being drivingly connected to said driving shaft. The driving mechanism includes a driven shaft and means for rotating and oscillating the driven shaft. A tool holder is provided on the driven shaft for holding a tool having a working surface adapted for sanding, rasping or filing a workpiece, a handle is fixedly connected to the casing and includes electric power conducting means and a switch for energizing and deenergizing the electric motor, and a guide and support for mounting attached to the casing.

Claims8

Dependent claims

A portable power tool comprising

a housing,
a motor in said housing and having a motor shaft,
a handle on said housing and including control means for said motor,
a driving mechanism in said housing and including an output shaft having a shaft axis,
a generally cylindrical tool for sanding, rasping or filing a workpiece and attachable to said output shaft,
means for guiding and supporting said power tool on a workpiece surface and having a recess through which said cylindrical tool extends,
said driving mechanism being connected to said motor shaft so as to rotatably drive said output shaft, and including means for oscillating said output shaft,
said oscillating means comprising
an intermediate shaft which has a shaft axis and is drivingly connected by said driving mechanism to said motor shaft,
a swash plate which is fixed to said intermediate shaft at a slant angle to said intermediate shaft axis, and
follower means engaging said swash plate and being connected to said output shaft, so that when said intermediate shaft and said swash plate rotate, said follower means reciprocates oscillating said tool along said output shaft axis.

8 more elements

A hand-held machine tool comprising:

a casing (1) having first and second hollows (4,5) therein,
an electric motor (20) enclosed in said first hollow (4) and having a driving shaft (41),
a driving mechanism (30) accommodated in said second hollow (5) and being drivingly connected to said driving shaft (41),
said driving mechanism (30) including a driven shaft (42), means for rotating said driven shaft (42) and means (80) for oscillating said driven shaft (42),
a tool holder (70) on said driven shaft (42) for holding a tool (100) having a working surface (101) adapted for sanding, rasping or filing a workpiece,
a handle (6) fixedly connected to said casing (1) and including electric power conducting means (21) and a switch (22) for energizing and de-energizing said electric motor (20), and
a guiding and supporting means (10) having mounting means (13,14) for being attached to said casing (1), wherein said means for rotating said driven shaft (42) comprises gear transmission means and said means (80) for oscillating comprises a swash plate (82) connected at a slant angle to an intermediate shaft (83), and a grooved roller (81) connected to said driven shaft (42), and further comprising interengaging means which comprise meshing gears (85,84) such when said driven shaft rotates, said intermediate shaft (83) and said swash plate (82) are driven and cause said grooved roller (81) and said driven shaft (42) to reciprocate.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 08/491,413Filed 16 Jun 1995
Priority: DE 295 04 138 U10 Mar 1995
Granted: 21 Oct 1997
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

B24B 23/03
With rotating grinding tools; Accessories therefor: the tool being driven in a combined movement
B23B 31/11
Characterised by the retaining or gripping devices or their immediate operating means: retention by threaded connection
B23D 67/12
Filing or rasping machines or devices: hand-held or hand-operated filing or rasping devices
B23D 69/00
Filing or rasping machines or devices. characterised only by constructional features of