Abstract: A rock bolt device that includes a non-anchoring elongation section that allows elongation of the rock bolt device under tensile load to accommodate rock movement after installation of the rock bolt device.

Abstract: The present invention relates to stable anti-parallel heteropolynucleotide duplexes, comprising a plurality of complementary purine-purine nucleobase dyads, wherein the nucleobase is coupled to a pentose sugar backbone. The present invention further relates to methods of hybridizing two heteropolynucleotide molecules to form such purine-purine nucleobase dyads, as well as kits and solid supports comprising such purine-purine nucleobase dyads.

Abstract: The present invention relates to stable anti-parallel heteropolynucleotide duplexes, comprising a plurality of complementary purine-purine nucleobase dyads, wherein the nucleobase is coupled to a pentose sugar backbone. The present invention further relates to methods of hybridizing two heteropolynucleotide molecules to form such purine-purine nucleobase dyads, as well as kits and solid supports comprising such purine-purine nucleobase dyads.

Abstract: A medical training manikin having a body, a model of a lung including inflatable airways communicating with the lung model, and fastener means for selectively attaching the model of a lung to the body. The model of a lung is used to demonstrate various lung functions and ailments.

Abstract: An umbrella with an integral anchoring structure is provided. The umbrella includes a post having a lower end for insertion into the ground, and an upper end for supporting an umbrella top. The umbrella includes an integral spiral shaped anchoring structure formed on the lower end of the post. The anchoring structure is formed with a width, W, greater than a diameter of the post and a length, L, which is adapted to stabilize a weight of the umbrella and secure the umbrella and the post in a variety of earthen conditions such as sand, lawn, and soil even in a prevailing breeze or stormier conditions. The umbrella further includes one or more retractable levers integrally attached along the post.

Abstract: An umbrella with an integral anchoring structure is provided. The umbrella includes a post having a lower end for insertion into the ground, and an upper end for supporting an umbrella top. The umbrella includes an integral spiral shaped anchoring structure formed on the lower end of the post. The anchoring structure is formed with a width, W, greater than a diameter of the post and a length, L, which is adapted to stabilize a weight of the umbrella and secure the umbrella and the post in a variety of earthen conditions such as sand, lawn, and soil even in a prevailing breeze or stormier conditions. The umbrella further includes one or more retractable levers integrally attached along the post.

Abstract: An axially compact brake is disclosed according to the teachings of the present invention as being spring engaged and fluid released for rotationally controlling an electric motor shaft for driving a machine, robot, or other apparatus component. The brake includes a housing formed by an air-chamber housing portion and an annular plate. The air-chamber housing portion includes a friction interface disc and an axial cylindrical member for reciprocally receiving an annular piston to form a fluid pressure cylinder. The annular plate is secured to the cylindrical member and includes torque pins extending into the piston. Coil springs extend axially between the annular plate and the piston. The housing portion has a square outer perimeter defining mounting pads at its corners for sandwiching the housing between the apparatus component and the motor.

Abstract: A two-speed clutch is shown according to the preferred embodiment of the teachings of the present invention for the selective rotational relation of an input shaft with a first or second sheeve unit having different diameters. The first sheeve unit is rotatably mounted to the input shaft. The second sheeve unit is mounted to a housing in turn rotatably mounted to the input shaft. The clutch includes a friction disc which is located between and frictionally interrelates with the first sheeve unit or the housing. The housing includes a single, reciprocally mounted piston for moving the friction disc. Utilizing a two-speed clutch of the present invention eliminates the requirement of two separate and complete drive units as in prior techniques. Furthermore, since the housing performs multiple functions, i.e.