Abstract: Sonic energy is applied to parts of the human body by a device having an applicator end at which a predetermined amplitude under applied loads is generated. A predetermined acoustic pressure is produced at the applicator end as well as a predetermined shear stress. The applicator is slanted at an angle relative to the longitudinal axis of the device and a predetermined mechanical power is produced.

Abstract: A sonic toothbrush and method produces acoustic pressure. A predetermined bristle tip velocity is generated under applied load. A predetermined acoustic pressure is produced under applied load. A predetermined shear stress is produced and predetermined mechanical power is produced. Bacterial and microbial plaque under the gumline and in pockets is dislodged without physical contact between the plaque surface and bristle tips.

Abstract: The hydraulic apparatus comprises a handpiece connected via a pipe to a pump through an outlet orifice of the casing and a liquid reservoir feeding the pump, in the position of non-utilization the handpiece and the pipe rolled up in a spiral are accommodated on a platform. The end of the pipe connected to the outlet orifice of the casing is installed rotationally movably about the axis of the pipe. Preferably, the platform is itself installed on the casing in a movable manner about an axis perpendicular to the plane of this platform, by a turning adapter mounted in the outlet orifice of the casing.

Abstract: An oral hygiene device has a handle and an automatic stem insertion system and comprises a pair of keys on the motor driven shaft. A bore receives the shaft, and slots receive the keys. A pair of sleeves each having a ramp for receiving and engaging the keys. When coupling the stem to the handle and with a camming action of the keys on the ramp, the ramps guide the keys into the slots. A radially extending flange is on the base of the shaft; and a pair of flexible arms having a recess receive the flange. Upon coupling the stem to the handle, the flange engages the arms and flex the arms outwardly and further movement of the stem onto the handle causes the flange to enter the recesses with a snap action; and upon withdrawal of the stem from the handle, the flange causes the arm to flex outwardly to release the flanges from the recesses.

Abstract: The nozzle holder comprises a liquid conduit and a valve (5) actuated by a control button (8) which, in the rest position, leaves free the passage of the jet of pulsed liquid towards the nozzle fixed to the nozzle holder and which, in the pressed position, closes this passage.The valve (5) comprises a chamber (9) which is in communication with the upstream part (6) of the conduit and connected through the opening (7a) of the valve to the downstream part (7) of said conduit. This chamber (9) is delimited partially by an elastic cup (10) which can be deformed by the button (8) and which, in the rest state of the button (8), under the effect of its own elasticity and of the pressure of the liquid, remains moved away from the opening (7a) of the valve and is completely inactive while, under the action of the pressed button, it covers the opening (7a) of the valve (5) to block the passage of the liquid.

Abstract: The apparatus for bodily care, in particular for massaging the gums and cleaning the teeth, by means of a jet of liquid pulsed by a piston pump, comprises a working chamber (4) connected to an outlet conduit (5), in which chamber the piston (6) is driven with reciprocating movements by an electric motor, an admission chamber (2) connected to an admission conduit (3) and an admission valve (9) arranged in the communication opening between the admission (2) and working (4) chambers, and a reservoir of liquid (12) connected to the admission conduit for feeding a spraying nozzle (17) connected to the outlet conduit (5). The movable part (9a, 9b) of the admission valve (9) is accommodated freely and easily movable without any stress.

Abstract: The hydraulic apparatus comprises a handpiece connected via a pipe to a pump through an outlet orifice of the casing and a liquid reservoir feeding the pump, in the position of non-utilization the handpiece and the pipe rolled up in a spiral are accommodated on a platform. The end of the pipe connected to the outlet orifice of the casing is installed rotationally movably about the axis of the pipe. Preferably, the platform is itself installed on the casing in a movable manner about an axis perpendicular to the plane of this platform, by a turning adapter mounted in the outlet orifice of the casing.