US 12,146,498 B2
Vacuum blower
Tomohisa Umeki, Ohme (JP); and Kenji Suzuki, Ohme (JP)
Assigned to YAMABIKO CORPORATION, Tokyo (JP)
Filed by YAMABIKO CORPORATION, Ohme (JP)
Filed on Jan. 11, 2024, as Appl. No. 18/410,585.
Claims priority of application No. 2023-010976 (JP), filed on Jan. 27, 2023.
Prior Publication US 2024/0254995 A1, Aug. 1, 2024
Int. Cl. F04D 25/08 (2006.01); F04D 29/00 (2006.01)
CPC F04D 25/08 (2013.01) [F04D 29/002 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A vacuum blower configured to perform sucking work and blowing work, comprising:
a pipe including a suction port and a discharge port;
a blower fan driven by a driving source; and
a nozzle provided near the suction port of the pipe, and configured to feed pressurized wind generated by the blower fan into the pipe from around the pipe, and to eject the pressurized wind to the discharge port,
wherein:
the nozzle includes an inner pipe disposed inside of the pipe so as to be slidable relative to the pipe; and
by sliding the inner pipe relative to the pipe, the nozzle is configured to switch between: a sucking state, where a base end portion of the inner pipe comes into close contact with a base end portion of the nozzle facing the base end portion of the inner pipe, a front end portion of the inner pipe is separated from a front end portion of the nozzle facing the front end portion of the inner pipe, and the pressurized wind generated by the blower fan and fed to an outside of the inner pipe is ejected to the discharge port along an inside of the inner pipe; and a blowing state, where the front end portion of the inner pipe comes into close contact with the front end portion of the nozzle facing the front end portion of the inner pipe, the base end portion of the inner pipe is separated from the base end portion of the nozzle facing the base end portion of the inner pipe, and the pressurized wind generated by the blower fan and fed to the outside of the inner pipe is ejected to the suction port along the inside of the inner pipe, and
further wherein:
the front end portion of the nozzle includes a front end turn portion disposed around the front end portion of the inner pipe, and in the sucking state, the pressurized wind generated by the blower fan and fed to the outside of the inner pipe turns toward a base end at around the front end portion of the inner pipe, and is ejected to the discharge port along the inside of the inner pipe from a front end ejection port formed between the front end turn portion and the inner pipe; and
the base end portion of the nozzle includes a base end turn portion disposed around the base end portion of the inner pipe, and in the blowing state, the pressurized wind generated by the blower fan and fed to the outside of the inner pipe turns toward a front end at around the base end portion of the inner pipe, and is ejected to the suction port along the inside of the inner pipe from a base end ejection port formed between the base end turn portion and the inner pipe.