Abstract: A cartridge valve includes a body element adapted for mounting to a panel by jam nuts and including a chamber adapted to receive a core element, the chamber and core element being constructed and arranged to effect a bayonet-type connection, whereby the core element may be selectively installed or removed from the chamber without tools by means of sequential axial and radial manipulations of the core element with respect to the valve body.

Abstract: A quick-connect syringe tip for use with a dental handpiece. The syringe tip resists rotation about an axis through the connection end, allowing retraction of a cheek or lip without changing the orientation of a discharge fluid stream.

Abstract: A dental office is provided with a system to purify air and/or water delivered to the operatory. Purification is by UV-C light applied to the utilities as they are transported from supply to delivery sites. Ideally, the system includes separate devices structured and arranged to effect purification of the ambient air circulating within the operatory; the water supplied to the operatory and the water delivered to and through dental hand pieces in connection with a procedure.

Abstract: A dental syringe is constructed as an assembly of which the handle, head and tip components, which together include substantially all of the exterior surfaces of the syringe, can be quickly detached from an internal cartridge, which is connected to the utility conduits. The cartridge is constructed to close off the utility lines when it is detached from and to open the utility lines when it is connected to the remainder of the assembly.

Abstract: An actuator for a control valve of a dental syringe having a body including a button having a head larger than the diameter of a passageway in which the actuator is to be installed to actuate a control valve of the syringe, a shoulder closely fitting in the passageway, a shaft smaller than the shoulder and having an O-ring snugly fitted therearound and the O-ring also fitting into a groove provided therefor in the passageway, a valve stem engaging portion and a tapered collar extending from the shaft to the valve stem engaging portion to provide for easy O-ring installation.