u . s . patent application ser . no . 09 / 112 , 527 filed jul . 8 , 1998 , now u . s . pat . no . 6 , 167 , 587 , issued jan . 2 , 2001 , and u . s . patent application ser . no . 09 / 753 , 349 , filed jan . 2 , 2001 , commonly owned with this application , are incorporated herein by reference in their entirety . referring now to the drawings and to fig1 in particular , the upright extraction cleaning machine 12 comprises a base module 14 adapted to roll across a surface to be cleaned on wheels 552 , and an upright handle assembly 16 pivotally mounted to a rear portion of the base module 14 . the base module 14 comprises a lower housing portion 15 and an upper housing portion 17 , together defining an interior for housing components such as an agitation brush 206 . the upright handle assembly 16 includes a closed loop grip 18 at an upper portion thereof and a cord and hose wrap 20 for carrying an accessory hose 22 . the base module 14 further comprises a transparent facing 19 fixed to an upper portion of the upper housing portion 17 , and a transparent panel 32 fixed to the lower housing portion 15 beneath and substantially parallel to the transparent facing 19 . referring to fig2 and 3 , the lower housing portion 15 includes a brush housing 26 at a front portion thereof for housing a rotatably driven agitation brush 206 . the brush housing 26 includes an arcuate opening 28 at a front portion thereof for receiving the transparent panel 32 . the edge of the arcuate opening 28 substantially corresponds to the shape of the transparent panel 32 . the transparent panel 32 is mounted to the brush housing 26 . the upper housing portion 17 has at a front portion thereof an arcuate opening 38 with an edge substantially conforming to the shape of the transparent panel 32 and to the edge of the arcuate opening 28 of the brush housing 26 . the arcuate opening 38 of the upper housing portion 17 mounts on a rim 29 formed in either the transparent panel 32 or the arcuate opening 28 of the brush housing 26 . the connection between the upper housing portion 17 and the rim 29 is made watertight by the inclusion of a rope gasket 31 therebetween . when the rim 29 is not formed in the transparent panel 32 , the transparent panel 32 can also be secured in a watertight fashion to the brush housing 26 . the upper housing portion 17 thus forms an interior face of a suction nozzle 34 in conjunction with the transparent panel 32 . the transparent facing 19 is mounted in a watertight fashion over a working air conduit 704 formed in the upper face of the upper housing portion 17 . the suction nozzle 34 fluidly connects the conduit 704 to the atmosphere at the surface to be cleaned . the transparent facing 19 thus forms the exterior wall of the conduit 704 and the exterior face of the suction nozzle 34 . the suction nozzle 34 is therefore transparent , enabling the user to see through the front face of the base module 14 to the floor below the base module 14 , and into the brush housing 26 to see the brush 206 contained therein , as well as to view the flow of fluid through the suction nozzle 34 . the transparent panel 32 is formed with a transparent cover or lens 42 projecting from a rear portion thereof . the lens 42 has a lens edge 43 distal from the panel 32 that interfits with a lip 45 on the brush housing 26 to firmly seat the lens 42 on the brush housing 26 . the lens 42 is further aligned with and spans a lens opening 47 in an upper portion of the brush housing 26 behind the front portion of the brush housing 26 . the cover or lens 42 can have optical properties for directing or modifying light projecting from a light source , but the invention is not so limited . it is anticipated that the cover or lens 42 can be configured to pass light without modification . a heat shield 60 and a lamp socket 62 are mounted on the brush housing 26 , substantially aligned with the opening 47 . a lamp 63 is mounted into the lamp socket 62 . as electrical energy is applied selectively to the lamp 63 , light from the lamp 63 passes through the opening 47 and lens 42 . the lamp 63 thus illuminates the interior of the brush housing 26 , the brush 206 mounted in the brush housing 26 , and the floor covered by the brush housing 26 . the lamp 63 and lens 42 are further configured within the upper portion of the brush housing 26 to further direct light toward the front portion of the housing 26 and thereby illuminate the suction nozzle 34 and the floor directly to the front of the suction nozzle 34 due to the transparency of transparent panel 32 and transparent facing 19 . light from lamp 63 is generally restricted to the housing 26 and the surface in front of the cleaner by the heat shield 60 and the opacity of the upper housing 17 . the illuminated nozzle assembly provides the user with a viewable brush 206 and illuminates the brush 206 and the area being cleaned . further , it provides the user a serviceable lamp 63 . lamp 63 is serviceable from beneath the base module 14 . in the preferred embodiment , transparent panel 32 is mounted to the brush housing 26 by screws that extend through integrally molded bosses 33 on the transparent panel 32 and into threaded sockets 27 in the brush housing 26 . it is further anticipated that transparent panel 32 can be secured to housing 26 in a snap - fit relationship . in a further embodiment of the invention shown in fig4 a semi - cylindrical lamp housing 60 ′ is molded integrally with the upper motor housing 520 ′. the lamp housing 60 ′ includes a molded lamp socket cavity 64 ′ for receiving socket 62 ′ for alignment with an aperture 65 ′ into the lamp housing 60 ′. the interior of the lamp housing 60 ′ is further covered with a heat / light reflective tape or coating 61 ′. this coating 61 ′ serves to reflect and direct light from the lamp 63 ′ through the cover or lens 42 into the brush housing and further onto the floor in front of the base module 14 . the heat reflective aspect of coating 61 ′ serves to resist excessive heat buildup or transmission from the lamp 63 ′ to the lamp housing 60 ′, which , in the preferred embodiment , is of injection - molded construction . lamp 63 ′ is mounted in socket 62 ′ for operational positioning in lamp housing 60 ′. lamp 63 ′ is axially inserted into or removed from socket 62 ′ through aperture 65 ′. the user can access lamp 63 ′ from an underside of base module 14 , upon removal of integrally molded panel 32 and lens 42 from the inside of brush housing 26 ( see fig2 ). any features shown in fig1 - 4 , but not described herein , and further elements of the extraction cleaner , are disclosed in u . s . u . s . pat . no . 6 , 167 , 587 , issued jan . 2 , 2001 , and u . s . patent application ser . no . 09 / 753 , 349 , filed jan . 2 , 2001 , both of which are hereby incorporated by reference in their entirety . while the invention has been specifically described in connection with certain specific embodiments thereof , it is to be understood that this is by way of illustration and not of limitation . reasonable variation and modification are possible within the scope of the forgoing disclosure and drawings without departing from the spirit of the invention which is embodied in the appended claims .
a portable surface cleaning apparatus having a floor - traveling base module and an upright handle pivotally mounted to the base module , a liquid dispensing system including a dispensing nozzle associated with the base module and fluidly connected to a fluid supply chamber , a fluid recovery system including a suction nozzle associated with the base module and fluidly connected to a vacuum source and a recovery chamber , a window in the base module , and an illumination source behind the window for illuminating an area underneath and in front of the base module .