Portable work apparatus
AssigneeAndreas Stihl AG & Co. KG
InventorsBenjamin Rutschke, Sebastian Piekarek, Thilo Stützel, Mathias Schmitz
Life of this patent
Estimating the term…
Abstract
A portable work apparatus is designed as a vacuum and/or blower. It includes a housing (2) and a drive motor (3) arranged in the housing (2). A fan (4) has a spiral housing (5) and a fan wheel (6) arranged in the spiral housing (5). The spiral housing (5) has a housing section (8) which forms a first intake opening (9) of the fan (4). The fan wheel (6) has a first wall section (10) which forms a second intake opening (12) of the fan wheel (6). A gap seal (15) is formed between the housing section (8) of the spiral housing (5) and the first wall section (10) of the fan wheel (6). At least one air guide element (16) for generating a swirl zone (30) is formed in the gap seal (15).
Claims10
A portable work apparatus being a vacuum, a blower, or a vacuum-blower combination, comprising:
- a housing (2);
- a drive motor (3) arranged in the housing (2);
- and
- a fan (4) with
- a spiral housing (5) and
- a fan wheel (6) arranged in the spiral housing (5),
- wherein the fan wheel (6) can be driven by the drive motor (3) to rotate about an axis of rotation (7) to generate an air flow (31),
- wherein the spiral housing (5) has a housing section (8) which forms a first intake opening (9) of the fan (4),
- wherein the fan wheel (6) has a first wall section (10) which forms a second intake opening (12) of the fan wheel (6),
- wherein a gap seal (15) is formed between the housing section (8) of the spiral housing (5) and the first wall section (10) of the fan wheel (6), and
- wherein at least one air guide element (16) for generating a swirl zone (30) is formed in the gap seal (15).
Dependencies are inferred from the claim text.