Ryan Dwyer,Shawn Hurla,Raymond Lavallee, II,Brett Renck
申请号：
US14542565
公开号：
US20150139827A1
申请日:
2014.11.15
申请国别(地区):
US
年份:
2015
代理人:
摘要：
A vacuum machine is provided, comprising: an engine secured to a frame and having an engine shaft an impeller coupled to the engine shaft a shroud surrounding the impeller and having an inlet and an outlet a disk secured to the frame between the engine and the shroud, the disk having a plurality of spaced-apart notches around its perimeter and a spring-loaded latch pin secured to the shroud and configured to engage one of the notches when in a first, locking position, and to disengage from the notch when in a pulled-back, unlocked position, thereby permitting the shroud to rotate about the impeller and lock in any of a plurality of positions corresponding to the plurality of notches.
