Abstract: A locking valve stem cap system includes a sleeve, a valve stem cap, and a rotation tool. The sleeve is configured to threadingly engage a valve stem, with a portion of a threaded region of the valve stem protruding into a cap receptacle thereof. The valve stem cap is configured to be inserted into the cap receptacle of the sleeve and to threadingly engage the portion of the threaded region that is located within the cap receptacle. The rotation tool is configured to facilitate rotation of the valve stem cap when the outer periphery thereof is substantially surrounded by the sleeve, thereby facilitating tightening or loosening of the valve stem cap relative to the sleeve. Methods for installing and removing the valve stem cap system from a valve system are also disclosed.

Abstract: A receiver cover includes a stationary member that is configured to be secured to an end of a receiver for a trailer hitch. The receiver cover also includes a door which is hingedly connected to the stationary member. The door may be biased toward the stationary member, such as by one or more of a living hinge, a coiled spring, a magnetic field, or the like. Thus, when the receiver is not in use, the door automatically closes and is secured in a closed position over a receptacle in a receiver with which the receiver cover is used. When access to the receptacle of the receiver is desired, such as for coupling a trailer hitch therewith, the door may be opened against the bias so as to expose the receptacle.

Abstract: A locking valve stem cap system includes a sleeve, a valve stem cap, and a rotation tool. The sleeve is configured to threadingly engage a valve stem, with a portion of a threaded region of the valve stem protruding into a cap receptacle thereof. The valve stem cap is configured to be inserted into the cap receptacle of the sleeve and to threadingly engage the portion of the threaded region that is located within the cap receptacle. The rotation tool is configured to facilitate rotation of the valve stem cap when the outer periphery thereof is substantially surrounded by the sleeve, thereby facilitating tightening or loosening of the valve stem cap relative to the sleeve. Methods for installing and removing the valve stem cap system from a valve system are also disclosed.

Abstract: A receiver cover includes a stationary member that is configured to be secured to an end of a receiver for a trailer hitch. The receiver cover also includes a door which is hingedly connected to the stationary member. The door may be biased toward the stationary member, such as by one or more of a living hinge, a coiled spring, a magnetic field, or the like. Thus, when the receiver is not in use, the door automatically closes and is secured in a closed position over a receptacle in a receiver with which the receiver cover is used. When access to the receptacle of the receiver is desired, such as for coupling a trailer hitch therewith, the door may be opened against the bias so as to expose the receptacle.