Method for the operation of a motor-driven hand-held pressing apparatus, and hand-held pressing apparatus
AssigneeGustav Klauke GmbH
InventorEgbert Frenken
Life of this patent
Estimating the term…
Abstract
A hydraulic pressing unit includes a hydraulic pump, supply and hydraulic chambers, moving and stationary parts, a restoring spring, and a return valve provided within or attached to a housing. The moving part is displaced from a starting position into a pressing position as a result of filling the hydraulic chamber with a hydraulic medium from the supply chamber by using the hydraulic pump. The return valve is automatically displaced into an open position as a result of a hydraulic pressure corresponding to the pressing position, and the restoring spring moves the moving part. A piston acts on the flow of the hydraulic medium and lowers the pressure such that the return valve is displaced into the closed position.
Claims16
A method of operating a motor-actuated handheld pressing unit comprising the steps of:
- actuating a switch, to initiate a first pressing operation whereby one or more pressing jaws are moved from a starting position to a closed pressing position;
- automatically releasing said one or more pressing jaws when a prescribed pressing force has been reached or a prescribed amount of time has elapsed;
- interrupting said automatic release to stop said one or more pressing jaws in an intermediate position which is between said closed pressing position and said starting position;
- detecting and storing a measurement of travel and/or time and/or pressure which is associated with the intermediate position, said measurement being usable to interrupt said automatic release during subsequent pressing operations;
- and
- commencing a second pressing operation from said intermediate position whereby said one or more pressing jaws are moved from said intermediate position to said closed pressing position.
A method of operating a motor-actuated handheld pressing unit comprising the steps of:
- actuating a switch to initiate a pressing operation whereby one or more pressing jaws are moved from a starting position to a closed pressing position;
- automatically releasing said one or more pressing jaws by using a pressing piston when a prescribed pressing force has been reached or a prescribed amount of time has elapsed, the pressing piston being actuated hydraulically by a hydraulic medium;
- and
- checking the reaching of the prescribed pressing force by using a pressure sensor to detect the pressure of the hydraulic medium.
Dependencies are inferred from the claim text.