Abstract: Disclosed is a surgical fixation device to mount on bone. This device does not utilize screws and achieves stability via applying force to the inner wall of the bore and is therefore faster, easier to use, and less user dependent. The device facilitates fast, easy anchoring system for use with other devices that require rigid fixation to bone. The device provides for intermittent mounting of tools, equipment, and/or accessories to a cylindrical bore in bone for use in surgical applications without compromising surrounding bine structure such as done by the use of bone screws. Rigid fixation to bone is a common requirement for surgical procedures for placement of tools, monitoring systems, positional systems, or used as fiducial markers. The present fixation device removably mounts on bone without the disadvantages associated with bone screws and other fixation devices.

Abstract: A drone includes a drone chassis, a plurality of motors attached to the drone chassis, and a plurality of propellers coupled to the plurality of motors, the plurality of propellers extending above the drone chassis. A net assembly is mounted to the drone chassis. The net assembly extends above the plurality of propellers. The net assembly includes a frame and one or more portions of netting.

Abstract: Disclosed herein are bi-spring surgical impact tools and methods of use thereof. The bi-spring surgical impact tools can include a housing, a shuttle, a pinion, and first and second springs. The housing can define a cavity having a first end and a second end. The shuttle can be located within the cavity and define a plurality of indentations. The pinion can be located proximate the shuttle and have a plurality of protrusions sized to mesh with the plurality of indentations during rotation of the pinion. The first and second springs can be mechanically coupled to the housing and the shuttle. Rotation of the pinion in a first direction can translate the shuttle in a first direction towards the first end of the housing and rotation of the pinion in a second direction can translate the shuttle in a second direction towards the second end of the housing.

Abstract: A drone includes a drone chassis, a plurality of motors attached to the drone chassis, and a plurality of propellers coupled to the plurality of motors, the plurality of propellers extending above the drone chassis. A net assembly is mounted to the drone chassis. The net assembly extends above the plurality of propellers. The net assembly includes a frame and one or more portions of netting.