Abstract: A cover for a hot tub has wooden or other rigid ribs secured to a flexible, resilient foamed plastic sheet. One rib is secured at an edge of the tub to anchor the cover. The cover can be rolled between an extended position overlying the tub and a rolled retracted position adjacent the tub. A pair of brackets secured to the tub each have a depression in the top surface in which the retracted rolled cover rests.

Abstract: A windshield is either pivotally mounted or breakaway mounted along its bottom edge to a motorcycle fairing and releasably held in an upright position by means along sides of the windshield which allow the windshield to separate therefrom and either pivot forward or fly away from the rider upon the rider striking the windshield. In one embodiment, the windshield is held by bendable U-shaped clips, and the release of the windshield is achieved partly through flexing of the windshield and partly through the bending of the clips. In another embodiment, a resilient windshield is held between a pair of rigid U-shaped brackets in a flexed state, and release of the windshield upon impact is achieved solely through the flexing of the windshield.

Abstract: A motorcycle sidecar frame composed of five elongate struts secured together at their respective ends into a shape substantially conforming to that of a tetrahedron. In one embodiment, a portion of an elongate frame member found on a motorcycle comprises the sixth edge of the tetrahedron. Two of the vertices of the tetrahedral frame are respectively located at two spaced points of the frame member. The remaining two vertices of the tetrahedron are respectively secured to a sidecar suspension system. One of the vertices is secured to the top of a shock absorber, which extends downwardly to the axle of the sidecar wheel, and the other vertex is pivotally secured to the end of an arm, the other end of which is secured to the sidecar wheel axle. In an alternative embodiment of the basic tetrahedral frame, the function of the five elongate struts of the first embodiment and the sixth strut is provided by the edges or corners of a tetrahedron formed by suitable sheets of metal.

Abstract: Apparatus comprising a part of a shock absorbing wheel suspension system of a motorcycle sidecar which is adjustable for securing the sidecar wheel at both different toe-in positions and offset positions. The suspension system includes an elongate swing arm that is pivotally secured to the sidecar frame at one end and carries the wheel assembly at its other end. In one embodiment, the swing arm comprises two elongate members that may be secured together at different relative angular positions corresponding to different sidecar wheel toe-in positions. Means are also provided so that the wheel-carrying one of the two members may be secured at different locations along the length of the other elongate member corresponding to different wheel offset positions. The means provided for securing the members together at different angular positions also functions to secure them together at different relative longitudinal positions.

Abstract: Apparatus for mounting a sidecar to a motorcycle having a vertically disposed trapezoid-shaped frame section comprised of elongate struts interconnected at their ends defining a first vertex adjacent the motorcycle seat cushion and second and third vertices substantially below and in front of the first vertex includes three mounting bracket plates that are secured to the frame adjacent the three vertices, respectively. In one embodiment, three mounting brackets overlie two struts of the frame adjacent the vertex and are respectively clamped thereto by U-bolts. In another embodiment, a front engine mount of the motorcycle adjacent the third vertex is replaced by a mounting bracket plate which is secured to both the engine block and a frame member. Each mounting bracket plate carries the male portion of a clevispin connector for releasably attaching the sidecar to the mounting bracket plates.

Abstract: Apparatus for mounting a sidecar to a motorcycle adapted for adjustment by the motorcycle rider during transit to alter the orientation of the motorcycle relative to vertical to match the needs dictated by varying road conditions by providing pivotal connectors located along an axis substantially parallel to the direction of travel for relative pivotal motion between the sidecar and the motorcycle and by providing all other connectors spaced from said axis with means for adjusting their effective length.