Abstract: An electrical circuit and method for use in suppressing source and load-side transients appearing on a power-supply line. The circuit includes a high-speed clamping stage, a high-energy clamping stage, and a highly efficient LC filter for dissipating harmonic voltage and current caused by clamping the transient. A third clamping stage may be included so as to provide for common-mode suppression.

Abstract: A tie down assembly for use in securing one object to another, such as a camper to a truck, the tie down assembly including a specially configurated anchor member rigidly secured to a surface and having a head spaced from the surface by a diametrally reduced neck portion. A bracket member is provided with an interlock slot configurated to permit removable attachment of the bracket member to the anchor member only when the interlock slot in the bracket member is oriented in a predetermined complementary way with respect to the special configuration of the camper anchor. Once attached to the anchor member, the bracket member may be freely rotated with respect to the anchor member but can be removed only when properly aligned.

Abstract: A camper jack for mounting on a camper body, the jack having an extensible leg projectable from a hollow jack housing and attached to the camper body along the length of the housing. A piston cooperating in a cylinder in the extensible leg extends the leg from the housing. A hydraulic fluid reservoir is formed in the extensible leg in an annular space surrounding the cylinder. A valve block is coextensive with the extensible leg at the foot of the leg and contains the valves and pumping piston for the jack. Valving in the valve block permits manual extension and retraction of the extensible leg.