Abstract: A collapsible tube paste dispenser is disclosed, wherein the dispenser has a head portion that consists of two concave symmetrical parts. One of the symmetrical parts is a concave collapsible part, the other is a concave rigid end plate. Apart from conventional paste dispensers, the outlet structure is mounted laterally instead of mounted axially on the end plate, to accommodate a broad and smooth end plate, for easy and smooth operation. When the tube is emptied, the concave collapsible part will collapse and fit perfectly into the broad and smooth concave rigid end plate, resulting in an effortlessly total evacuation of the content of the tube.

Abstract: A toilet tissue anti-roll device is disclosed. The device is to be inserted behind a tissue roll in the space between the tissue and the wall. The device has a main body. The main body extends upward to form a top anchor, and extends downward to form a bottom anchor. There are left and right hooks attached to the main body. The left and right hooks hang the device onto the tissue roll and impart friction on it to prevent it from rolling out of control. The top and bottom anchors prevent the device from rolling with the tissue roll.

Abstract: A tire air pressure gauge that measures air pressure without connecting to the inside of the tire is disclosed. It generally consists of four parts: a handle, a plunger, a spring, and an indicator bar. The plunger is retractably mounted in the handle through the spring. The indicator bar is also slidably mounted on the handle. When plunged against the side wall of a tire, the plunger will retract, and will push the indicator bar outward. The amount of the portion of the indicator bar that is pushed out, indicates how high the air pressure inside the tire is. The more the indicator bar is pushed out, the higher the air pressure inside the tire.

Abstract: An underwater vehicle with unconventional configuration is disclosed, wherein the lateral boundary of the vehicle is parallel to the straight moving direction of the vehicle. There is an internal passage tunnel disposed inside the vehicle, connecting the front end and the rear end of the vehicle. The front and rear openings of the tunnel extend to the entire cross section of the vehicle. Looking from the outside, the vehicle is like an elongated tube with very thin walls. In operation, the water in the front of the vehicle is transported to the rear of the vehicle exclusively through the internal passage tunnel. Very little disturbances will be imparted to the surrounding water. This vehicle is highly efficient even at high speeds, hence is extremely suitable for high speed and long range operations.

Abstract: A rotational energy coupler generally regarded to as a transmission is described, wherein rotational energy is transmitted through inertial media. An input unit transmits rotational energy to a set of inertial masses by driving the inertial masses to gyrate. An output unit recovers rotational energy from the gyrating inertial masses by altering their natural travelling paths through a guiding system that guides the gyrating inertial masses into paths along which the distance to the axis of rotation of the output unit is not constant. As a result, an unidirectional torque is generated on the output unit. If the output unit rotates, rotational energy is consumed, if not, rotational energy is conserved. The magnitude of the torque so generated is related to the rotation rate difference between the input unit and the output unit in an exponential manner, namely: the magnitude of the torque is proportional to the square of the rotation rate difference.