Bedknife grinding device
OwnerStephen Geoffrey Bernhardinventor
Life of this patent
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Abstract
A device for grinding the bedknife 6 of a lawnmower comprising a mounting bar 4, electromagnets 2 which are mounted flush with the top face of mounting bar, and end brackets 8. In use, the bedknife is placed on mounting bar and is held in place by electromagnets while end brackets are positioned relative to the bedknife and the bedknife secured to them. When a grindstone motor (not shown) is started, the electromagnets are automatically de-energized. After grinding, the grindstone motor is stopped and electromagnets are re-energized to hold a bedknife in place while the end brackets are detached. The electromagnets are then manually de-energized so that the bedknife can be removed from the device.
Claims15
A device for grinding a bedknife of a lawnmower, the bedknife comprising axial ends, which device comprises support means to support the bedknife during grinding, at least one electromagnet energized to hold the bedknife in a pre-selected position relative to the support means, grinding means to grind the bedknife, and control means to automatically de-energize said at least one electromagnet upon commencement of grinding.
A securing assembly for a bedknife grinding device comprising support means to support the bedknife during grinding, at least one electromagnet energized to hold the bedknife in a pre-selected position relative to the support means, and control means to automatically de-energize said at least one electromagnet upon commencement of grinding.
A method for grinding the bedknife of a lawnmower, comprising placing the bedknife of the lawnmower on a mounting bar, manually energizing at least one electromagnet, securing the bedknife to at least one mounting bracket, commencing the grinding of the bedknife at which time the at least one electromagnet is automatically de-energized, ceasing grinding the bedknife at which time the electromagnet is automatically energized freeing the bedknife from the at least one mounting bracket, and manually de-energizing said at least one electromagnet to permit the removal of the bedknife.
Dependencies are inferred from the claim text.