Handheld work apparatus and suction head for connection to a fuel line in a handheld work apparatus

Patent metadata

Field	Value
Publication number	US-9273658-B2
Application number	US-201213684404-A
Country	US
Kind code	B2
Filing date	Nov 23, 2012
Priority date	Nov 25, 2011
Publication date	Mar 1, 2016
Grant date	Mar 1, 2016

Abstract

A handheld work apparatus includes a fuel tank, into which a flexible fuel line projects. A suction head is arranged at the free end of the fuel line. The suction head is connected via the fuel line to a fuel supply device of an internal combustion engine of the work apparatus. The suction head has at least one weight member. The weight member is formed at least partially as a magnet to achieve good cleaning of the fuel without a substantial increase in the weight of the work apparatus.

First claim

What is claimed is:

1. A hand-guided work apparatus comprising:
an internal combustion engine;
a fuel-metering device for metering fuel to said engine;
a fuel tank for accommodating the fuel metered to said engine;
a flexible fuel line projecting into said fuel tank and having a free end;
a suction head arranged at said free end of said flexible fuel line and being connected to said fuel-metering device via said flexible fuel line;
said suction head including a cover;
said cover including an outlet port for fuel;
said suction head including a housing and an intermediate part arranged between said cover and said housing of said suction head;
said intermediate part being connected via a first connection to said housing and via a second connection to said cover;
the first connection including first connecting means on said housing and second connecting means on said intermediate part and the second connection including third connecting means on said intermediate part and fourth connecting means on said cover;
said suction head including at least one weight member configured at least partly as a magnet;
said magnet being arranged on said intermediate part; and,
said first connecting means and said fourth connecting means being matched to each other so as to permit said intermediate part with said magnet to be removed and said first connecting means to be connected directly to said fourth connecting means.

2. The work apparatus of claim 1 , wherein the suction head includes at least two weight members.

3. The work apparatus of claim 1 , wherein at least one weight member is completely formed as a magnet.

4. The work apparatus of claim 1 , wherein said cover holds said weight member on said intermediate part.

5. The work apparatus of aim claim 1 , wherein said first connection and said second connection are snap-on connections.

6. The work apparatus of claim 1 , wherein said cover and said intermediate part have respective sides facing toward said housing, said side of said cover and said side of said intermediate part each having a seal extension and an annular extension; said seal extension of said cover and said seal extension of said intermediate part have the same configuration; the annular extension of said cover and the annular extension of said intermediate part have the same configuration; said second connecting means and said fourth connecting means have like configurations; and, said first connecting means and said third connecting means have like configurations.

7. The work apparatus of claim 1 , wherein said suction head has a housing; and, at least one weight member is attached to said housing of said suction head.

8. The work apparatus of claim 1 , wherein said housing includes a base opposite said cover; and, said at least one weight member is elongated, extends from said base into the interior of said housing, and is at least partially immersed in fuel.

9. A suction head for connection to a fuel line in a handheld work apparatus, the suction head comprising:
said suction head including a cover;
said cover including an outlet port for fuel;
said suction head including a housing and an intermediate part arranged between said cover and said housing of said suction head;
the intermediate part being connected via a first connection to said housing and via a second connection to said cover;
the first connection including first connecting means on said housing and second connecting means on said intermediate part and the second connection including third connecting means on said intermediate part and fourth connecting means on said cover;
at least one weight member configured at least partly as a magnet;
said magnet being arranged on said intermediate part; and,
said first connecting means and said fourth connecting means being matched to each other so as to permit said intermediate part with said magnet to be removed and said first connecting means to be connected directly to said fourth connecting means.

Assignees

• Stihl Ag & Co Kg Andreas

Inventors

• Kinnen Arno
• Tost Christopher
• Layher Wolfgang
• Dietenberger Michael
• Mayer Felix

Classifications

• F02M27/045

  by permanent magnets · CPC title

• F02M37/22

  Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system · CPC title

• F02B63/02

  for hand-held tools · CPC title

• F02M69/52 Primary

  Arrangement of fuel metering devices {(F02M69/18 takes precedence)} · CPC title

• B01D35/06

  Filters making use of electricity or magnetism (ultrafiltration, microfiltration B01D61/14; electrodialysis, electro-osmosis B01D61/42; devices comprising filters and magnetic separators B03C1/30) · CPC title