Fluid driven rotary hand tool

Claim 2

A rotary tool of the character referred to including an elongate, manually engageable barrel with front and rear ends, a cap with a fluid inlet opening and having connecting means on the rear end of the barrel, a helicoidal fluid motor with a forwardly projecting drive pin within the barrel including an elongate tubular resilient stator with a spiraled groove fixed in the barrel and a concentric helically fluted rotor extending through the stator and bearing supported at its opposite ends and having said drive pin mounted thereon adjacent the forward end of said barrel, a housing fixed to the front end of the barrel and defining a chamber in communication with the front end of the barrel and motor, an outlet opening in the housing spaced forward of the barrel, a driven shaft concentric with and bearing supported within the outlet opening, drive means between the drive pin and the driven shaft and a work engaging rotary part releasably engaged on said driven shaft outside of the housing adjacent said outlet openings.

Claim 3

A structure as set forth in claim 1 including chemical dispensing means comprising a core of interconnected cellular material within the rotor, fluid inlet ports in the rotor at its rear end and communicating with the core and the interior of the barrel longitudinally rearward of the stator and fluid outlet ports in the rotor at its front end and communicating with the core and the interior of the barrel longitudinally forward of the stator.

Claim 4

A structure as set forth in claim 1 wherein said drive means includes a driven gear on the driven shaft within the housing, a drive shaft in the housing driven by said pin and a drive gear driven by said drive shaft and engaging the driven gear.

Claim 5

A structure as set forth in claim 1 including chemical dispensing means comprising a core of interconnected cellular material within the rotor, fluid inlet ports in the rotor at its rear end and communicating with the core and the interior of the barrel longitudinally rearward of the stator and fluid outlet ports in the rotor at its front end and communicating with the core and the interior of the barrel longitudinally forward of the stator, said drive means includes a driven gear on the driven shaft within the housing, a drive shaft in the housing driven by said pin and a drive gear driven by said drive shaft and engaging the driven gear.

Claim 6

A structure as set forth in claim 1 wherein said drive means includes a gear part with a plurality of radially spaced driven gears and fixed on said driven shaft within the housing, a drive shaft with the housing concentric with the rotor and connected with the pin, an elongate jack-shaft in axial alignment with the drive shaft with a rear end in axially shiftably rotary driving engagement with the drive shaft, a front end portion rotatably and slidably engaged through a front opening in the housing and manually engageable at the exterior of said housing and a drive gear on the jack shaft selectively engageable with the driven gears upon normal axial shifting of the jack shaft.

Claim 7

A structure as set forth in claim 1 wherein said drive means includes a gear part with a plurality of radially spacEd driven gears and fixed on said driven shaft within the housing, a drive shaft with the housing concentric with the rotor and connected with the pin, an elongate jack-shaft in axial alignment with the drive shaft with a rear end in axially shiftably rotary driving engagement with the drive shaft, a front end portion rotatably and slidably engaged through a front opening in the housing and manually engageable at the exterior of said housing and a drive gear on the jack shaft selectively engageable with the driven gears upon normal axial shifting of the jack shaft, said structure further including chemical dispensing means comprising a core of interconnected cellular material within the rotor, fluid inlet ports in the rotor at its rear end and communicating with the core and the interior of the barrel longitudinally rearward of the stator and fluid outlet ports in the rotor at its front end and communicating with the core and the interior of the barrel longitudinally forward of the stator.

Claim 8

A structure as set forth in claim 6 wherein said drive gear is a bevel gear, said gear part is a conical part with said drive gears being bevel gears on the conical surface thereof, the driven gears being spaced radially from each other a distance greater than the axial extent of the drive gear whereby said gear means is out of driving engagement when said drive gear is positioned between adjacent driven gears.

Claim 9

A structure as set forth in claim 7 wherein the rear end of the barrel, rearward of the rotor has a partition with circumferentially spaced forwardly and circumferentially disposed jet ports and said rotor has circumferentially spaced radially outwardly projecting helically pitched vanes with surfaced opposing said jet ports, whereby jets of fluid flowing forwardly through the jet ports impinging upon the vane to impart rotary forces onto and through the rotor.

Claim 10

A structure as set forth in claim 1 wherein the rear end of the barrel, rearward of the rotor has a partition with circumferentially spaced forwardly and circumferentially disposed jet ports and said rotor has circumferentially spaced radially outwardly projecting helically pitched vanes with surfaced opposing said jet ports whereby jets of fluid flowing forwardly through the jet ports impinging upon the vane to impart rotary forces onto and through the rotor.

Claim 11

A structure as set forth in claim 1 which further includes manually operable valve means to meter the flow of motive fluid into and through the construction whereby operation of the construction can be stopped and started and its speed controlled.