Back to results
US 5,383,275 AGranted
Hand planer
AssigneeRobert Bosch GmbH
InventorsEugen Hild, Kai-Uwe Floettmann
Life of this patent
Estimating the term…
Abstract
A hand planer comprises a housing, a planer head supported in the housing, a motor driving the planer head, a fan blower connected with the motor for generating a flow of air for moving chips, a chip ejector, two air guidance ducts through which the flow of air is guided from the fan blower to the chip ejector, a chip conveying duct having a chip discharge opening such that planed chips exit the chip conveying duct through the chip discharge opening, the chip ejector accommodating both the chips and the flow of air, and guides for guiding the flow of air in a switchable manner to the chip conveying duct via one of the two air guidance ducts. Therefore the problem of ejecting the chips in a preselected direction with extreme precision and high efficiency is met.
Claims13
A hand planer, comprising a housing;
- a planer head supported in said housing;
- a motor driving said planer head;
- a fan blower connected with said motor for generating a flow of air for moving chips;
- a chip ejector;
- two air guidance ducts through which the flow of air is guided from said fan blower to said chip ejector;
- a chip conveying duct having a chip discharge opening such that planed chips exit said chip conveying duct through said chip discharge opening, said chip ejector accommodating both the chips and the flow of air;
- and means for guiding the flow of air in a switchable manner to said chip conveying duct via one of said two air guidance ducts, said chip discharge opening being formed so that the flow of air is guided past said chip discharge opening exclusively for generating an injector suction action via said chip discharge opening.
4 more elements
A hand planer, comprising a housing;
- a planer head supported in said housing;
- a motor driving said planer head;
- a fan blower connected with said motor for generating a flow of air for moving chips;
- a chip ejector;
- two air guidance ducts through which the flow of air is guided from said fan blower to said chip ejector;
- a chip conveying duct having a chip discharge opening such that planed chips exit said chip conveying duct through said chip discharge opening, said chip ejector accommodating both the chips and the flow of air;
- and means for guiding the flow of air in a switchable manner to said chip conveying duct via one of said two air guidance ducts, said chip ejector having a first ejector opening located at one side of the hand planer and a second ejector opening located on the other side of the hand planer, said guiding means including a tubular air directing valve arranged so as to be rotatable for switching the air flow at said chip discharge opening between a first axial rotating position in which the chips are injected via said first ejector opening and a second axial rotating position in which the chips are ejected through said second ejector opening.
4 more elements
A hand planer, comprising a housing;
- a planer head supported in said housing;
- a motor driving said planer head;
- a fan blower connected with said motor for generating a flow of air for moving chips;
- a chip ejector;
- two air guidance ducts through which the flow of air is guided from said fan blower to said chip ejector;
- a chip conveying duct having a chip discharge opening such that planed chips exit said chip conveying duct through said chip discharge opening, said chip ejector accommodating both the chips and the flow of air;
- and means for guiding the flow of air in a switchable manner to said chip conveying duct via one of said two air guidance ducts, said air guidance ducts form ports located adjacent to said chip discharge opening, said ports of said air guidance ducts having an axis which extends transversely to said chip conveying duct.
4 more elements
A hand planer, comprising a housing;
- a planer head supported in said housing;
- a motor driving said planer head;
- a fan blower connected with said motor for generating a flow of air for moving chips;
- a chip ejector;
- two air guidance ducts through which the flow of air is guided from said fan blower to said chip ejector;
- a chip conveying duct having a chip discharge opening such that planed chips exit said chip conveying duct through said chip discharge opening, said chip ejector accommodating both the chips and the flow of air:
- and means for guiding the flow of air in a switchable manner to said chip conveying duct via one of said two air guidance ducts, said air guidance ducts form ports located adjacent to said chip discharge opening, said ports of said air guidance ducts being symmetrical relative to said chip discharge opening.
4 more elements
A hand planer, comprising a housing;
- a planer head supported in said housing;
- a motor driving said planer head;
- a fan blower connected with said motor for generating a flow of air for moving chips;
- a chip ejector;
- two air guidance ducts through which the flow of air is guided from said fan blower to said chip ejector;
- a chip conveying duct having a chip discharge opening such that planed chips exit said chip conveying duct through said chip discharge opening, said chip ejector accommodating both the chips and the flow of air;
- and means for guiding the flow of air in a switchable manner to said chip conveying duct via one of said two air guidance ducts, said air guidance ducts form ports located adjacent to said chip discharge opening, one of said ports of said air guidance ducts being always closed, while another of said ports is open, said open port being located at a greater distance from said chip ejector than said chip discharge opening.
4 more elements
A hand planer, comprising a housing;
- a planer head supported in said housing;
- a motor driving said planer head;
- a fan blower connected with said motor for generating a flow of air for moving chips;
- a chip ejector;
- two air guidance ducts through which the flow of air is guided from said fan blower to said chip ejector;
- a chip conveying duct having a chip discharge opening such that planed chips exit said chip conveying duct through said chip discharge opening, said chip ejector accommodating both the chips and the flow of air;
- and means for guiding the flow of air in a switchable manner to said chip conveying duct via one of said two air guidance ducts, said housing having a hollow cylindrical guide body, said air directing valve being arranged so as to be rotatable in said hollow cylindrical guide body, said air guiding ducts have ports which together with said chip discharge opening entering said guide body radially, said apertures overlapping with said air discharge opening.
4 more elements
A hand planer, comprising a housing;
- a planer head supported in said housing;
- a motor driving said planer head;
- a fan blower connected with said motor for generating a flow of air for moving chips;
- a chip ejector;
- two air guidance ducts through which the flow of air is guided from said fan blower to said chip ejector;
- a chip conveying duct having a chip discharge opening such that planed chips exit said chip conveying duct through said chip discharge opening, said chip ejector accommodating both the chips and the flow of air;
- means for guiding the flow of air in a switchable manner to said chip conveying duct via one of said two air guidance ducts;
- and toggle-like handles arranged at opposite ends of said air guiding means.
5 more elements
Dependencies are inferred from the claim text.