Portable handheld suction/blower apparatus

US8104138B2 · kind B2 · utility

Assignee

• Andreas Stihl AG & Co. KG · DE

Inventors

• Harald Schliemann · Waiblingen, DE
• Manfred Rabis · Schorndorf, DE

Key dates

• Filing date: Feb 17, 2006
• Grant date: Jan 31, 2012
• Expiry date: Nov 7, 2028

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E01H1/0836
• WIPO field: Civil engineering
• WIPO sector: Other fields

Abstract

A portable handheld suction/blower apparatus includes a motor-driven blower (1) and at least one air guide tube (3) connected to the blower (1) at a connecting location (2) to conduct flow. The connecting location (2) is configured at least as a double-winding connection (9) which has pairs of outer thread sections (4) of an outer winding (5) and inner thread sections (7) of an inner winding (8). The pairs are distributed about the periphery of the threaded connection. The periphery of the connecting location (2) is subdivided by the number of pairs of thread sections (4, 7) into a corresponding number of angular segments (10). The sum of angular extents (α, β) of a pair of individual thread sections (4, 7) is in total less than an angular extent (γ) of the corresponding angular segment (10).