التفاصيل البيبلوغرافية
| العنوان: |
BLOWER DUCT |
| Document Number: |
20090126147 |
| تاريخ النشر: |
May 21, 2009 |
| Appl. No: |
12/360745 |
| Application Filed: |
January 27, 2009 |
| مستخلص: |
A portable-blower duct has a bendable portion whose inner peripheral surface is a cylindrical surface without any protrusions or recesses in a normal state or in an expanded state, that is, unless it is greatly curved. With this construction, no turbulence is generated in air passing through a tube, thereby making it possible to suppress pressure loss. Thus, the flow velocity of air guided through the duct is not reduced, thereby suppressing a deterioration in air blowing efficiency. Even when the tube is curved, the outer side of the curved portion is expanded, and the corresponding portion of the inner peripheral surface remains a smooth surface, thus making it possible to minimize the air pressure loss. |
| Inventors: |
NAKAZAWA, Satoshi (Kawagoe-shi, JP); Yamazaki, Maki (Kawagoe-shi, JP); Saito, Takeshi (Tokyo, JP) |
| Assignees: |
HUSQVARNA ZENOAH CO. LTD. (Kawagoe-shi, JP) |
| Claim: |
1. A blower comprising: a blower main body having an air-sending port and being arranged to supply air to the air-sending port; a duct comprising: a bendable portion including a flexible tube having a smooth inner peripheral surface at least in a non-contracted state, a plurality of protruding portions formed along a circumferential direction of the tube and arranged at predetermined intervals in an axial direction of the tube, and an elbow that connects the air-sending port with the bendable portions wherein an inner diameter of the elbow is substantially the same as an inner diameter of the air-sending port. |
| Claim: |
2. A blower according to claim 1, wherein: the tube is a cylindrical member made of a synthetic resin; and the protruding portions are formed integrally with the tube so that the protruding portions are continuous with an outer peripheral surface of the tube. |
| Claim: |
3. A blower according to claim 1, wherein the protruding portions are annular. |
| Claim: |
4. A blower according to claim 1, wherein the plurality of protruding portions are connected to one another as a spiral configuration on an outer peripheral surface of the tube, with adjacent portions thereof being arranged at predetermined intervals. |
| Claim: |
5. The blower according to claim 1, wherein the blower main body is arranged to supply a predetermined amount of air to the air-sending port. |
| Claim: |
6. The blower according to claim 1, wherein the elbow is curved in a circular arc shape. |
| Current U.S. Class: |
15/405 |
| Current International Class: |
47; 04 |
| رقم الانضمام: |
edspap.20090126147 |
| قاعدة البيانات: |
USPTO Patent Applications |