Abstract: A power operated pressure washer having a high pressure liquid supply hose with an inlet fitting formed with an axial stem having a central liquid passageway that can be connected to a pressure washer outlet fitting by a threaded retaining ring. As a feature of this invention, the retaining ring can be unscrewed from the pressure washer outlet for permitting the dissipation and venting of high pressure buildup within the hose while the retaining ring safely retains the hose fitting on the outlet. In one embodiment, the stem has a pair of axially spaced annular sealing members adaptable for sealing engagement with relatively smaller and larger size pressure washer outlets and the stems is formed with a transverse passageway for venting liquid from the central stem passageway around one of the sealing members, as an incident to unscrewing of the retaining ring, while the other sealing member remains in sealed engagement with the pressure washer outlet fitting.

Abstract: A pressure washer is provided. The pressure washer includes a water inlet port for receiving water from a water source. A water outlet port is in fluid communication with the water inlet port. A pump is in fluid communication with the water inlet port and the water outlet port for pressurizing the water received through the water inlet port and pumping the pressurized water through the water outlet port. An internal combustion engine powers the pump. A heat transfer unit is interposed between and in fluid communication with the water inlet port and the water outlet port. The heat transfer unit receives exhaust gas from the internal combustion engine and uses the exhaust gas to heat the water as it travels between the water inlet port and the water outlet port.

Abstract: A portable handheld pressure washer is provided that includes an electric motor and a pump that are contained within a housing that has a built-in handle with a trigger on an upper side of the housing. The pressure washer of the present invention can also include a discharge lance to which various cleaning nozzles or other cleaning implements can be attached.

Abstract: A coupling fitting for high pressure hose is provided. The coupling fitting includes a stem portion made of metallic material for connection to the high pressure hose. A coupling head made of a non-metallic material is connected to an end of the stem portion. The coupling head is configured for connection with a complementary fitting.

Abstract: A pressure washer is provided including a housing. A pump is contained within the housing for pressurizing fluid received through a water inlet port and for pumping the pressurized fluid through an outlet port. An application wand is connected to the water outlet for outputting a pressurized stream of fluid. At least one wheel is supported on the housing so as to enable rolling movement of the housing. A first handle is arranged on the housing for movement between a retracted position in which a gripping portion of the handle is arranged relatively closer to the housing and an extended position in which the gripping portion of the handle is arranged relatively further away from the housing.

Abstract: The invention provides an abrasion-resistant high pressure hose with an inner core comprising a flexible material; a flexible reinforcing sheath covering the core that has a grid of interwoven strands of reinforcing fiber material; and a clear-coated jacket covering the sheath with an optically transparent or translucent polymeric material such that the reinforcing sheath is visible though the jacket to a user from the outside of the hose. The invention also provides a method of manufacturing a clear-coated abrasion resistant hose. The invention also provides a high pressure washing apparatus with a clear-coated abrasion resistant hose.

Abstract: A power operated pressure washer having a high pressure liquid supply hose with an inlet fitting formed with an axial stem having a central liquid passageway that can be connected to a pressure washer outlet fitting by a threaded retaining ring. As a feature of this invention, the retaining ring can be unscrewed from the pressure washer outlet for permitting the dissipation and venting of high pressure buildup within the hose while the retaining ring safely retains the hose fitting on the outlet. In one embodiment, the stem has a pair of axially spaced annular sealing members adaptable for sealing engagement with relatively smaller and larger size pressure washer outlets and the stems is formed with a transverse passageway for venting liquid from the central stem passageway around one of the sealing members, as an incident to unscrewing of the retaining ring, while the other sealing member remains in sealed engagement with the pressure washer outlet fitting.

Abstract: A flexible pressure-washer hose and pressure washing apparatus are disclosed. The hose is of concentric laminar construction and comprises an inner core, an intermediate metallic sheath covering the core, and a jacket covering the intermediate sheath. The disclosed hose has a burst pressure of at least 12,000 psi, yet is highly flexible. The disclosed pressure washer comprises a hose made in accordance with the invention and fluidically connecting a source of pressurized fluid to an operator wand.

Abstract: A floor scrubber for cleaning floor surfaces that includes a cleaning head which defines a downwardly opening cleaning zone having a plurality of spray nozzles connected to a power washer pump for directing pressurized liquid flow streams onto the floor surface during a cleaning operation. The cleaning head further defines a separate downwardly opening vacuum zone connected to a wet/dry vacuum device operable for creating a vacuum pressure within the vacuum zone for removing liquid that has been directed onto the floor surface. The wet/dry vacuum device preferably further is operable for selectively directing a positive air flow into the vacuum zone to facilitate drying of the floor surface after cleaning and vacuum removal of the liquid.

Abstract: A water floor broom having a spray head that defines an elongated manifold liquid flow passageway communicating with a plurality of liquid spray nozzles, a handle fixed to said body defining a liquid flow passageway communicating with said spray head, and a power washer coupled to said handle for directing pressurized liquid via said handle to said spray head for discharge from the spray nozzles for cleaning a floor surface. The spray head has a light weight, rigid plastic construction that can be operated with lesser quantities of cleaning liquids, and a squeegee blade secured rewardly of the spray head for simultaneously scraping and cleaning water from the floor surface directed onto the floor surface by the spray head for minimizing or eliminating subsequent cleanup.

Abstract: A water floor broom having a spray head that defines an elongated manifold liquid flow passageway communicating with a plurality of liquid spray nozzles, a handle fixed to said body defining a liquid flow passageway communicating with said spray head, and a power washer coupled to said handle for directing pressurized liquid via said handle to said spray head for discharge from the spray nozzles for cleaning a floor surface. The spray head has a light weight, rigid plastic construction that can be operated with lesser quantities of cleaning liquids, and a squeegee blade secured rearwardly of the spray head for simultaneously scraping and cleaning water from the floor surface directed onto the floor surface by the spray head for minimizing or eliminating subsequent cleanup.

Abstract: A soaker/sprinkler hose having a cylindrical cross section with radial discharge orifices circumferentially spaced about the entire perimeter of the conduit along the length thereof for simultaneously directing liquid flow streams downwardly into the ground on one side of the conduit for soaking the ground and upwardly into the air for watering the ground in sprinkling fashion. The hose is formed with a plurality of axially aligned rows of discharge orifices, at circumferentially spaced intervals about the conduit, and is cured in a retractable coiled condition which facilitates random direction of the discharging liquid streams when the hose is extended and which facilitates handling and storage of the hose. A method of making the coiled soaker/sprinkler hose also is disclosed.

Abstract: An electrical pressure washer includes a diagnostic circuit for detecting operation conditions that may affect the normal operation of the pressure washer, and a plurality of indicators indicating the detected operation conditions, such as ground fault, low pressure, overheating, etc. A voltage drop across the power cord of the pressure washer is monitored and used to identify several of the operating conditions. A way of connecting and controlling light-emitting diodes used as indicator lights is provided to allow energy-efficient operation of the indicator lights.

Abstract: A water-operated wash brush which includes a casing that supports a rotary brush and an impellor which drives the rotary brush through a gear train as an incident to direction of wash liquid into the casing from a tangential nozzle. The casing has a clear plastic cover for observing rotary operation of the impellor with the gear train being ascetically disposed on an underside of the impellor. A circular splash plate is interposed between the gear train and the rotary brush for preventing the splash back of wash liquid that might impede operation of the gear train.

Abstract: A coupling for connecting flexible hoses together is provided. The coupling includes male and female fittings both of which include integral shank and quick disconnect coupling portions. The shank portions of the male and female fittings each being insertable at least partially in a respective one of the flexible hoses for securing the fittings to the hoses. The coupling portion of the male fitting including a stem and the coupling portion of the female fitting being configured to receive and non-threadably engage the stem of the male fitting. The coupling portion of the male fitting including a collar movable between locked and unlocked positions such that in the locked position the male and female fittings are securely engaged and in the unlocked position the stem portion of male fitting can be selectively decoupled from the coupling portion of the female fitting.

Abstract: A water-operated wash brush which includes a casing that supports a rotary brush and an impellor which drives the rotary brush through a gear train as an incident to direction of wash liquid into the casing from a tangential nozzle. The casing has a clear plastic cover for observing rotary operation of the impellor with the gear train being ascetically disposed on an underside of the impellor. A circular splash plate is interposed between the gear train and the rotary brush for preventing the splash back of wash liquid that might impede operation of the gear train.

Abstract: A universal pressure washer extension/replacement hose adapted for use with pressure washers which have different diameter liquid discharge outlets. The extension hose has identical connecting fittings at its opposite ends, one of which can be coupled in sealed relation to a pressure washer outlet of either of two known sizes and the other of which is connectable to a spray gun hose through a universal adaptor having connecting chambers of said two known sizes.

Abstract: A universal pressure washer extension/replacement hose adapted for use with pressure washers which have different diameter liquid discharge outlets. The extension hose has identical connecting fittings at its opposite ends, one of which can be coupled in sealed relation to a pressure washer outlet of either of two known sizes and the other of which is connectable to a spray gun hose through a universal adaptor having connecting chambers of said two known sizes.