Portable handheld work apparatus having an internal combustion engine

A portable handheld work apparatus comprising:

• a housing having an intermediate wall partitioning said housing into an engine compartment and a carburetor compartment;
• an internal combustion engine mounted in said engine compartment and having a cylinder provided with cooling ribs;
• a carburetor operatively mounted in said carburator compartment and being connected to said engine;
• said carburetor having a carburetor housing;
• a fan wheel for generating a cooling airflow passing over said cooling ribs causing said cooling airflow to become a heated cooling airflow;
• an opening formed in said intermediate wall for passing said heated cooling airflow to said carburetor for temperaturizing said carburetor as may be needed;
• a closure element for selectively opening or closing said opening for controlling the heated cooling airflow to said carburetor;
• said closure element being mounted on said intermediate wall in said en sine compartment;
• said closure element having an air guide wall extending substantially transversely to said heated cooling airflow so as to cause said heated cooling airflow to be at least in part backed up and deflected;
• said closure element being configured to be in a selectable position so as to cause said heated cooling airflow to be split into a first component of heated cooling airflow to said carburetor to there flow about said carburetor housing so as to warm said carburetor housing from the outside thereof and a second component of heated cooling airflow toward said cooling ribs;
• said closure element including a first part in the form of a fixed socket and a second part in the form of a movable slider;
• said socket having a channel formed therein which can be cleared or blocked by said slider;
• and,
• said channel being configured to be at least partially disposed in said cooling air flow when said channel is cleared.

A portable handheld work apparatus comprising:

• an internal combustion engine having a cylinder provided with cooling ribs;
• a carburetor having a carburator housing and being operatively connected to said engine;
• a fan wheel for generating a cooling airflow passing over said cooling ribs causing said cooling airflow to become a heated cooling airflow;
• an opening configured to pass said heated cooling airflow to said carburetor for temperaturizing said carburetor as may be needed;
• a closure element for selectively opening or closing said opening for controlling the heated cooling airflow to said carburetor;
• said closure element having an air guide wall extending substantially transversely to said heated cooling airflow so as cause said heated cooling airflow to be at least in part backed up and deflected;
• and,
• said closure element being configured to be in a selectable position so as to cause said heated cooling airflow to be split into a first component of heated cooling airflow to said carburetor to there flow about said carburetor housing so as to warm said carburetor housing from the outside thereof and a second component of heated cooling airflow flowing toward said cooling ribs;
• said air guide wall being at least partially disposed in said cooling airflow in every one of said selectable positions of said closure element;
• an intermediate wall defining a plane;
• said closure element being configured as an insert component;
• receiving fixtures formed laterally next to said opening and running parallel to said plane;
• said receiving fixtures defining mutually opposite-lying slots;
• and,
• said insert component being configured to be insertable into said receiving fixtures.