Abstract: An oar includes a retractable shaft with a blade and a grip connected to two ends thereof. A socket is connected to the shaft by a pin and includes a first toothed surface on the end surface of the socket. The grip includes a tubular portion which is mounted to the socket. A spring and a bolt are located in the socket, and the bolt is securely connected with the grip so that the spring is biased between the grip and the head of the bolt. The tubular portion of the grip includes a second toothed surface in an inner end thereof so as to be removably engaged with the first toothed surface of the socket.

Abstract: A cooking utensil with a built-in automatic stirring device includes a pot body and a cover which is provided on an open top of the pot body and which confines an enclosed space. A rotary knob is rotatably mounted on the cover and has an axial shaft which extends into the enclosed space. The rotary knob is rotated so as to set a desired stirring method. A gear set is provided inside the enclosed space and rotates with the axial shaft of the rotary knob. A stirring implement has a shaft portion which is rotatably driven by the gear set and which extends into the pot body. The shaft portion has a lower end which is disposed adjacent to a closed bottom of the pot body and which is provided with at least one radially extending stirring blade. A spiral spring is connected to the gear set and is wound when the rotary knob is rotated. The spiral spring gradually unwinds to drive rotatably the gear set and cause axial rotation of the stirring implement for the duration of the stirring period.