Abstract: A combination sleeping pad and backpack which may be used as a sleeping pad that when assembled and fastened together, portions of the pad function as a backpack.

Abstract: A stent retrieval device for insertion in an artery and capable of being guided along a radiopaque wire is described. The stent retrieval device includes a plurality of flexible individual fingers housed in a flexible tube with the fingers normally biased toward the interior surface of the tube so that when they are pushed out of the tube they will expand the artery and then grasp the stent to be removed.

Abstract: A golf club head made by brazing certain ceramic materials to certain metals by utilizing brazing alloys so as to provide, upon cooling, a compressively loaded component of the golf club head. The certain ceramic materials are joined to the certain metals by a brazing alloy.

Abstract: System for controlling the discharge rate of a material feeder. A weight scale connected to the material is sampled and the samples input to a digital processor. The digital processor determines for consecutive time intervals during discharge of said material, a weight loss over the time interval. The weight loss for the interval is compared with a desired weight loss which is calculated from a desired setpoint material discharge rate obtained only when the weight loss is constant and stable. The resulting error is averaged with subsequent errors to form a control signal for the material feeder. The calculation of errors over each subsequent interval increases the resolution of the control signal, increasing the ability to control discharge rates to compensate for changes in material density which otherwise affect discharge rates.