Cleaning solution spraying system
OwnerRobert A. Flinn, Alfred E. Flinninventors
Life of this patent
Estimating the term…
Abstract
A cleaning solution spraying system for cleaning roofs and other outside areas on or about a house that includes in combination (a) a venturi unit, (b) a nozzle unit, (c) coupling hose to connect the venturi unit with a pressurized water stream source, (d) a tubular arrangement to connect the venturi unit with a source of liquid cleaning chemical, (e) a conduit joining the venturi unit to the nozzle unit, (f) a check valve to prevent flow of liquid through the tubular means into the venturi unit, (g) a shut-off valve to prevent flow of liquid through the conduit toward the venturi unit and (h) a check valve to prevent flow of liquid from the venturi unit into the coupling hose.
Claims3
A cleaning solution spraying system comprising:
- a venturi unit, a nozzle unit including a shut-off valve, coupling means to connect said venturi unit with a pressurized water stream source, tubular means to connect said venturi unit with a source of liquid cleaning chemical, said tubular means including an adjustable valve means, conduit means joining said venturi unit to said nozzle unit, a first check valve means to prevent flow of liquid from said venturi unit through said tubular means and a second check valve means to prevent flow of liquid from said venturi unit through said coupling means, a third check valve means to prevent flow from said nozzle unit to said venturi unit,
- said venturi unit comprises:
- a tubular inlet portion of length L1 defined by a first inlet end including a circular inlet opening of diameter D1, a first outlet end, and a first central passage integrally joining said first inlet end to said first outlet end,
- an tubular outlet portion of varying longitudinal circular cross-section defined by:
- a second inlet end,
- a second outlet end including a circular outlet opening of diameter D2 and
- a second central passage integrally joining said second inlet end to said second outlet end,
- said second central passage being defined by an inflow section of length L2 and an outflow section of length L3,
- said inflow section tapering outwardly from said second inlet end toward said outflow section, the circular junction of said inflow section with said outflow section having a diameter of D3,
- said outflow section tapering outwardly from said inflow section toward said second outlet end, and
- a throttle portion of circular cross-section having a diameter D4 and a longitudinal length L4 joining said first outlet end to said second inlet end,
- a lateral conduit of circular cross-section of diameter D5 positioned a distance L5 from said second inlet end communicating with said inflow section,
- first connection means associated with said first inlet end to connect said venturi unit to said coupling means, and
- second connection means associated with said second outlet end to connect said venturi unit to said conduit means.
Dependencies are inferred from the claim text.