Pumps – With condition responsive pumped fluid control – Inlet throttle or stop valve
Patent
1998-03-10
2000-05-09
Thorpe, Timothy S.
Pumps
With condition responsive pumped fluid control
Inlet throttle or stop valve
417234, 41742314, 4151212, 415151, F04B 4900
Patent
active
060595418
ABSTRACT:
An improved air inlet cover and impeller for a convertible electric blower/vacuum. The blower/vac includes an electric motor which drives an impeller. A plurality of blades located on the impeller define a frusto-conical surface of revolution. The air inlet cover includes an integral, frusto-conical pressure ring which is located offset but generally congruent to the surface of revolution defined by the impeller blades. The cover additionally includes an air grate that allows the passage of air but prevents the passage of other objects. The grate also includes a choke member for adjusting the effective area of the air inlet into the blower/vac to control the exit air volume and velocity of the blower. The cover also includes a bell-mouthed opening integral with the choke member to increase the efficiency of the blower/vac when in the blower mode.
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Beckey Thomas J.
Porter Steven R.
Shaffer Chadwick A.
Svoboda Steven J.
The Toro Company
Thorpe Timothy S.
Torrente David J.
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