Handheld work apparatus having a pump, said pump and pump bulb therefor
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United States of America Patent
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Feb 12, 2019
Grant Date -
May 21, 2015
app pub date -
Nov 19, 2014
filing date -
Nov 19, 2013
priority date (Note) -
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Abstract
A handheld work apparatus has a fuel supply system and a pump for delivering fuel from the fuel supply system. The pump has an elastic pump bellows which can be actuated by the operator. The pump bellows has a fastening section at which the pump bellows is fastened to a housing. The pump bellows has a main section and a roof section, wherein the roof section has a dome-shaped section adjoining the main section and a cap which adjoins the dome-shaped section and closes off the dome-shaped section. In order to achieve a rapid return of the pump bellows from the actuated position into the unactuated position, even at low temperatures, it is provided that the smallest wall thickness (g) of the main section is at least 10% greater than the smallest wall thickness (h) of the dome-shaped section.
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