Abstract: Apparatus for bending elongated members transversely to a web thereof without substantially altering the cross-sectional configuration thereof including a flexible form having a plurality of pivotal seats and flexible plates. Flexible mandrels including a plurality of parallel plates are received within the elongated members and, in combination with a plurality of clamps, the flexible form and a press plate supporting the elongated member, prevent the bending forces exerted thereon from distorting the cross-sectional configuration of the elongated members. The flexible form distributes the exerted force required to bend the elongated member over a selected length thereof, thereby reducing the unit force exerted on any selected point to a level that will not buckle the elongated member.

Abstract: A massaging bed that provides a deep penetrating massage utilizes a narrow tread roller assembly reciprocated by a carriage beneath a flexible cover member. The roller assembly provides essentially point contact with the user's body such that the upward force of the roller assembly is concentrated in a small area which by virtue of the rotation of the roller assembly and reciprocation of the carriage moves laterally and longitudinally in a non-repetitive pattern.

Abstract: A mine roof bolt assembly including a roof bolt, one end of which has rolled threads, leaving the outer periphery of the end of the roof bolt jagged, and the central portion thereof of concave configuration. An expansion shell is mounted on the roof bolt and includes expandable leaves held together by means which permit limited radially outward movement under urging of a wedge member threadedly engaged with the roof bolt. A stop tab carried by the expansion shell limits the penetration of the roof bolt into the expansion shell. The stop tab is provided with a downwardly struck indentation which engages the concave portion of the roof bolt, the stop tab being spaced from the jagged peripheral edge of the roof bolt.