Tank for an operating substance and especially a tank for an operating substance for a portable handheld work apparatus

A tank for holding an operating substance, the tank comprising:

• a tank housing having a tank interior and including a first housing part;
• and,
• a second housing part connected to said first housing part and defining said tank interior conjointly therewith;
• a valve unit disposed in said tank interior and including a valve member and a valve opening;
• said second housing part defining said valve opening;
• said first housing part including said valve member arranged therein so as to be in seal-tight contact engagement with said valve opening;
• said tank including a fill opening and a suction connection through which said operating substance is drawn;
• said valve unit further including a cylinder-shaped stub for holding said valve member;
• and,
• said cylinder-shaped stub being disposed in said first housing part so as to project in a direction toward said second housing part.

A tank for holding an operating substance, the tank comprising:

• a tank housing having a tank interior and including a first housing part;
• and,
• a second housing part connected to said first housing part and defining said tank interior conjointly therewith;
• a valve unit disposed in said tank interior and including a valve member and a valve opening;
• said second housing part defining said valve opening;
• said first housing part including said valve member arranged therein so as to be in seal-tight contact engagement with said valve opening;
• said tank including a fill opening and a suction connection through which said operating substance is drawn;
• said valve member being made of an elastomeric bonded two-component sealing mass;
• and,
• said valve member being sprayed onto said first housing part.

A tank for holding an operating substance, the tank comprising:

• a tank housing having a tank interior and including a first housing part;
• and,
• a second housing part connected to said first housing part and defining said tank interior conjointly therewith;
• a valve unit disposed in said tank interior and including a valve member and a valve opening;
• said second housing part defining said valve opening;
• said first housing part including said valve member arranged therein so as to be in seal-tight contact engagement with said valve opening;
• said tank including a fill opening and a suction connection through which said operating substance is drawn;
• said first and second housing parts having first and second partition surfaces, respectively, which conjointly define a partition interface;
• and,
• said tank further including a solid matter seal arranged at
• said partition interface;
• and, said first and second housing parts being connected to each other with said solid matter seal being disposed therebetween.

An overhead branch cutter comprising:

• a drive motor assembly;
• a gearcase;
• a guide bar mounted on said gearcase;
• a saw chain movably mounted on said guide bar;
• a rod for operatively connecting said gearcase to said drive motor assembly so as to permit said drive motor assembly to move said saw chain around said guide bar;
• a tank for holding a lubricant for said saw chain;
• said tank including a tank housing mounted on said gearcase;
• said tank housing having a tank interior and including a first housing part;
• and,
• a second housing part connected to said first housing part and defining said tank interior conjointly therewith;
• a valve unit disposed in said tank interior and including a valve member and a valve opening;
• said second housing part defining said valve opening;
• said first housing part including said valve member arranged therein so as to be in seal-tight contact engagement with said valve opening until there is a predetermined underpressure in said tank;
• and,
• said tank including a fill opening and a suction connection through which said lubricant is drawn for lubricating said saw chain thereby generating said underpressure.