Abstract: A multifunction windshield wiper includes a wiper arm, a wiper blade holder, and a wiper blade to facilitate, through channels, the direct distribution of the liquid or an air on the windshield surface. The direct distribution of the liquid and an air maximize the wiping effect and minimizes their usage. The wiper arm is assembled with wiper blade holder within the flexible spherical joints to refine the contact with a curved surface during the operational movement of the windshield wiper in the different weather conditions. The windshield wiper arm has a flexible joint with the link arm to facilitate the tension on the windshield surface during the wiping process.

Abstract: An electric can opener with rotating spherical joint for removal a lid from a can is provided. The rotation of motorized driver in a helical cam moves readily a cutting blade toward a transport wheel to engage the end of the can, so that it is in the proper condition to cut end from the can. Further rotation of the transport wheel, forces the can against the blade to cut the end of the can.

Abstract: The tennis racket for interacting with the tennis ball has the flexible head, the flexible handle, and the string tension mechanism. The tennis racket head form with the handle the flexible spherical joint, with the inner adjustment of the tension, and the angle of the head. The tennis racket handle has flexible gripping to absorb the impact from the incoming tennis ball. The string tension mechanism is operated manually for the adjustment the tension. The structure flexibility of the tennis racket minimizes the injury, and offers more enjoyment of the play.

Abstract: The tennis racket for interacting with the tennis ball has the flexible head, the flexible handle, and the string tension mechanism. The tennis racket head form with the handle the flexible spherical joint, with the inner adjustment of the tension, and the angle of the head. The tennis racket handle has flexible gripping to absorb the impact from the incoming tennis ball. The string tension mechanism is operated manually for the adjustment the tension. The structure flexibility of the tennis racket minimizes the injury, and offers more enjoyment of the play.

Abstract: A manual can opener that can be operated with ease by both left-handed and right-handed users. The initial rotation of an operating handle in either direction moves readily a cutting blade toward a transport wheel to engage the lid of the can, and simultaneously rotates the transport wheel in a direction opposite to that of handle rotation so that the cutting blade is in proper condition to cut a lid from the can. Further rotation of the operating handle, in the direction of initial rotation, then forces the can against the blade to cut the lid of the can.

Abstract: A child-proof closure cap for containers having an inner cap and an outer cap assembled for tilting with respect to each other. The inner cap includes an outer surface with notches for engagement with internal teeth on an inner surface of the outer cap to facilitate removal of the closure cap from the container with either left hand or right hand operation according to user's natural ability. The outer cap has a spring that is adapted to spring load the outer cap in a non-tilt arrangement relative to the inner cap.

Abstract: A child-proof closure cap for containers having an inner cap and an outer cap assembled for tilting with respect to each other. The inner cap includes an outer surface with notches for engagement with internal teeth on an inner surface of the outer cap to facilitate removal of the closure cap from the container with either left hand or right hand operation according to user's natural ability. The outer cap has a spring that is adapted to spring load the outer cap in a non-tilt arrangement relative to the inner cap.

Abstract: A child-proof closure cap for containers having an inner cap and an outer cap assembled for tilting with respect to each other. The inner cap includes a partially spherical or curved outer surface with notches for engagement with internal teeth on a partially spherical or curved inner surface of the outer cap to facilitate removal of the closure cap from the container with either left hand or right hand operation according to user's natural ability.

Abstract: A manual can opener that can be operated with ease by both left-handed and right-handed users is provided. The initial rotation of an operating handle in either direction moves a transport wheel linearly toward a cutting blade to engage the end of the can, and simultaneously cants the cutting blade in a direction opposite that of handle rotation so that it is in proper condition to cut the end from the can. Further rotation of the operating handle, in the direction of the initial rotation, then forces the can against the blade to cut the end of the can.