Abstract: A pump chuck includes a main body, a pivot clip connected pivotally to an end cap of the main body, and a whistle assembly mounted in the main body. The end cap is rotatable relative to the main body for selecting one of valve holes in the end cap to connect with a valve stem of a tire and fixed thereat by the pivot clip. The whistle assembly does not generate a sound in a state that the whistle assembly receives a normal air pressure, but generates a whistling sound when the air pressure in the tire exceeds a preset pressure so as to prevent the tire being inflated from puncture or damage.

Abstract: A brake safety apparatus that prevents an over the handlebar accident caused by applying too much brake force to the front brake of a bicycle is presented. The present invention works by effectively extending the length of the brake cable connected between the brake lever and the brake caliper on the front brake of a bicycle. An embodiment of brake release system comprises a brake cable housing coupled to a piston at a distal end of the lumen of a housing. The piston resides within the lumen of the housing. Between the piston and the proximal end of the housing is a compression spring with a desired spring rate and a preload breakout force. The proximal end of the housing is fixedly coupled to the front braking system of a bicycle.

Abstract: A pump chuck for connection with a valve stem of a tire valve is disclosed. The pump chuck comprises a body having a first bore, a second bore, a third bore and a passageway connecting the first bore and the third bore therethrough, a pivot clip pivotally mounted on the body and having a plurality of threads on one end and a depression on a bottom surface, a spring compressed between the pivot clip and the body, a rubber seal housed inside the first bore of the body, an end cap mounted on the top surface of the body above the first bore, and a connector housed inside the third bore of the body to connect a hose from a tire pump. The contact of the rubber seal against the valve stem affects an air tight seal.

Abstract: A pump chuck for connection with a valve stem of a tire valve is disclosed. The pump chuck comprises a body having a first bore, a second bore, a third bore and a passageway connecting the first bore and the third bore therethrough, a pivot clip pivotally mounted on the body and having a plurality of threads on one end and a depression on a bottom surface, a compression spring compressed between the pivot clip and the body, a pneumatic piston and a washer housed inside the first bore of the body, an end cap mounted on the top surface of the body above the first bore, and a connector housed inside the third bore of the body to connect a hose from a tire pump. The pneumatic piston utilizes air pressure from the tire pump to push the washer against the valve stem to affect an air tight seal.

Abstract: The present invention is a brake release system that prevents an over the handlebar accident caused by applying too much brake force to the front brake of a bicycle. By the retention and release of the brake cable housing or brake cable to partially release the front brake to prevent an over the handlebar accident. The present invention works by extending the length of the brake cable connected between the brake lever and the brake caliper on the front brake of a bicycle. The brake release system comprises a brake cable housing held by a piston. A hardened steel ball is used to keep the piston from moving and releasing the brake cable. A spring is used to push the ball against the piston. The amount of engagement of the ball with the piston and the spring force determine the release force. When the brakes are released, a spring automatically resets the brake release system when the rider releases the brake lever. The present invention is cost efficient.