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US 5,071,069 AGranted
Hand-held high-pressure cleaner
AssigneeBlack & Decker Inc.
InventorMichael Stirm
Life of this patent
Estimating the term…
Abstract
A hand-held high-pressure cleaner has a pump, which is driven by a universal motor. The universal motor is positioned together with the fan attached to its armature shaft in an air-tight and water-tight sealed motor chamber of the tool-casing of the high-pressure cleaner. In this motor chamber a radiator or cooler, through which cleaning fluid flows, is provided for cooling the air circulated by the fan.
Claims16
A hand-held high-pressure cleaner, comprising:
- a tool-casing;
- a universal motor having an armature shaft;
- a fan mounted on the armature shaft for passing air through said motor;
- a pump driven by said motor and having an inlet and an outlet;
- said inlet being connectable, in use, to a source of cleaning fluid;
- said outlet being connected to a spray nozzle;
- an air-tight and water-tight sealed motor chamber in said tool-casing, said motor and said fan both being located in said sealed motor chamber;
- a radiator also located in said sealed motor chamber, said radiator being connected, in use, between the source of cleaning fluid and said pump inlet to create flow of cleaning fluid through said radiator;
- and
- said radiator having cooling ribs or fins, which together with walls sections of said motor chamber, form return flow-paths for the air passed through said motor, said fan circulating the air through said motor and said flow paths with the circulated air being cooled during passage through said flow paths before re-passing through said motor.
7 more elements
A hand-held high-pressure cleaner, comprising:
- a tool-casing having therein a sealed motor chamber;
- a pump supported by said tool-casing;
- a spray nozzle connected to said pump;
- an electric motor housed in said sealed motor chamber, said motor having an armature shaft with a fan mounted thereon, said fan passing cooling air through an interior of said motor;
- said pump being driven by said armature shaft for pumping, in use, cleaning fluid to said nozzle from a cleaning fluid inlet connection of the high-pressure cleaner;
- a radiator housed in said sealed motor chamber;
- said radiator having a plurality of air paths therethrough which communicate with said fan and said motor interior, said fan circulating air in closed circuit through said motor interior and said air paths;
- and
- said radiator having a passage therethrough for the cleaning fluid, said passage being connected between said cleaning fluid inlet connection and said nozzle with said radiator, in use, effecting cooling of said circulating air by the cleaning fluid.
6 more elements
A hand-held cleaner, comprising:
- a tool-casing having a spray lance at a forward end and a handle formed at a rear end;
- a motor chamber and a separate but adjacent drive compartment being disposed in said tool-casing, said motor chamber being hermetically sealed and being rearward of said drive compartment;
- a universal motor mounted in said motor chamber with an armature shaft of said motor extending forwardly into said drive compartment;
- a pump mounted at said forward end with said spray lance extending from said pump, said pump having a rear end disposed in said drive compartment;
- a radiator mounted in said motor chamber separately from and below said motor;
- said radiator having a passage extending therethrough from a rear to a front of said motor chamber, a rear end of said passage being connected to an inlet connection for cleaning fluid, and a forward end of said passage being connected to an inlet of said pump;
- said radiator having a plurality of cooling ribs defining with side walls of said motor chamber a plurality of flow-paths for cooling air, ends of said flow-paths communicating with opposite ends of said motor, portions of said flow paths extending parallel to said passage and other portions of said flow paths traversing said passage;
- a fan disposed in said motor chamber and mounted on said armature shaft adjacent said drive compartment, said fan circulating cooling air interiorly through said motor and through said flow-paths, the cooling air cooling the motor and being in turn cooled by cleaning fluid passing through said radiator passage, the so cooled air then re-circulating through said motor;
- and
- a reduction drive in said drive compartment drivingly connecting said armature shaft to said pump.
7 more elements
Dependencies are inferred from the claim text.