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A dental compressed-air motor, consisting of a housing in which there is arranged a rotatably supported rotor adapted to be set into rotation by means of operational compressed air which is introduced into the housing through the intermediary of an operational compressed-air inlet conduit, and which

A dental compressed-air motor, consisting of a housing in which there is arranged a rotatably supported rotor adapted to be set into rotation by means of operational compressed air which is introduced into the housing through the intermediary of an operational compressed-air inlet conduit, and which includes a rotor shaft connectable with a work tool, wherein the operational compressed-air inlet conduit has associated therewith a regulating device located within the housing, with an externally operable handle for effecting the turning of a rotary slide valve supported within the motor housing for variation of the rotational speed and/or the direction of rotation of the rotor. Furthermore, at one end of the motor housing there are provided coupling means for connection with a dental handpiece supporting the work tool and, at the other end of the motor housing, coupling means in the form of an attachment element for connection with a supply hose conducting compressed air or other media streaming towards or from the motor housing or handpiece, whereby the rotary slide valve is located intermediate the motor and the attachment element and whereby the attachment element is provided with essentially axially incoming and essentially axially further extending media through-passageways which are connected to the media conduits leading to the location of application for the compressed-air motor or the handpiece.

대표청구항 ▼

In a dental compressed-air motor, a housing; a rotatably supported rotor in said housing adapted to be rotated by compressed drive air introduced through a compressed drive air inlet conduit; a rotor shaft connectable with a work tool on said rotor, regulating means including externally operable han

In a dental compressed-air motor, a housing; a rotatably supported rotor in said housing adapted to be rotated by compressed drive air introduced through a compressed drive air inlet conduit; a rotor shaft connectable with a work tool on said rotor, regulating means including externally operable handgrip means in said housing and being turnable through said regulating means for varying the rotational speed and/or the direction of rotation of said rotor; first coupling means at one end of said housing for connection with a dental handpiece mounting said work tool and second coupling means formed by an attachment element for connection with a supply hose conveying compressed air or other flow media towards or from said housing and said handpiece, said rotary slide valve being arranged intermediate said rotor and said attachment element, said attachment element including essentially axially entering and axially extending media through-passageways connected with media conduits leading to the location of use of the compressed-air motor and handpiece; the improvement comprising: said attachment element including an axial guide spigot axially detachably insertable into a receiving aperature of said housing open towards the connecting side and into which there extends said media passageways and terminate in outlet openings at the side of said guide spigot, said outlet openings being sealed relative to each other and being at predetermined spacings, said housing including inlet openings on the side wall of the receiving aperture associated with the outlet openings of the guide spigot which are in communication with the outlet openings of said guide spigot upon insertion of the latter and from which there extend the media conduits leading to a location of use for said handpiece; said rotary slide valve including a central cylindrical insertion aperture extending substantially along the entire axial length of the rotary slide valve for receiving a cylindrical end portion of said guide spigot, said end portion having at least one side outlet opening for compressed drive air which in each turned position of the rotary slide valve is in communication with at least one compressed drive air inlet opening on the side wall of the insertion aperture and from which there extends at least one media conduit representing the compressed drive air passageways in said rotary slide valve, and whose outlet openings are adapted to be superimposed on at least one inlet opening of at least one conduit leading to the displacement space of said rotor in said housing representing a location of use.