Disclosed are systems and devices for controlling the closing of a door. A head unit is to be installed in a doorjamb, comprising a chamber filled at least in part with a shear thickening fluid. A piston is connected to a cap and configured to exert pressure against the shear thickening fluid in response to a force applied to the cap. The systems and devices provide an adjustable design that resists door slamming and aggressive closure, serving as a safety device as well as noise, damage and pet control around doors (preventing closure if desired). An install kit provides exact location, depth control and guide to place over the head unit to tap it into place with a hammer.

A shroud for a dust extractor comprises: a body portion including a tubular housing forming a passageway and having a first and second inlets defining first and second openings; an engaging portion including a tubular housing forming a passageway, the tubular housing connecting to a third opening formed through a wall of the body portion to connect the passageway of the engaging portion with the passageway of the body portion on one end, and including a third inlet defining a fourth opening on another end; and a seal mounted in the second inlet of the body portion, the outer edge of the seal being attached to the periphery of the second inlet, the seal projecting radially inwardly towards the longitudinal axis of the tubular body.

A depth-indicating device for determining the depth of insertion of a surgical tool comprising a pair of spaced apart end caps, separated by a compressed spring, with the surgical tool passing through axial openings in both end caps, and firmly attached to one of the end caps, but free to slide through the opening in the other. A guide tube is attached to the second endcap, such that the surgical tool can be guided to its operating position on a body part. The second end cap and guide tube are attached to a location having a known position relative to the body part. A tracking marker is attached to the first end cap such that its longitudinal position can be tracked using a remote racking camera. Since the surgical tool is attached to the first end cap, the tool position is also tracked by the tracking system.

A depth limiting device includes an axial braking structure; a limited shrinking structure, the limited shrinking structure surrounding a moving object, and being in a home position or a compressed position; and a structure adapted for pushing the limited shrinking structure to the home position. The axial braking structure axially brakes the moving object such that the moving object moves together with the depth limiting device, and when the moving object enters into a subject, the limited shrinking structure is pressed against the subject, moves from the home position to the compressed position, and stops the moving object from entering further into the subject.

A pocket hole jig system is formed of a plurality of jig segments, wherein each jig segment includes a main body having a drill guide and a lock feature that protrudes outward on a first side of the main body and a recess that protrudes inward on a second side of the main body. The system also includes one or more spacers that have a main body of varying width and a lock feature that protrudes outward on a first side of the main body and a recess that protrudes inward on a second side of the main body. Jig segments and spacers may be connected together by inserting the lock feature of a jig segment or spacer into the recess of an adjacent jig segment or spacer. In one arrangement opposing jig segments and/or spacers lock together with a combination of rotational movement as well as sliding movement.

The invention relates to a stop for a rotating drilling, milling or countersinking tool which comprises a stop sleeve which is freely rotatably coupled, by means of a sliding or rolling bearing, around the tool. A first bearing bush of the bearing supports the stop sleeve. A second bearing bush of the bearing sits in a rotationally fixed manner on a shaft sleeve. The shaft sleeve can be pushed and fastened on a shaft of the tool. In a secondary aspect, the invention relates to a drilling, milling or countersinking tool having such a stop.

The invention relates to a drill hold assembly and a jig including the same. The drill hold assembly includes an engaging means which is selectively moveable between a released position to allow sliding movement of the drill bit with respect thereto and an engaged position in which the drill bit is held in a fixed position or within a predefined range of movement with respect to the engaging block to thereby maintain the drill bit in location with the drill hold assembly. The jig apparatus can be used with a powered drill to rotate the drill bit to provide a driving force to the drill bit and the jig is attached to a support surface and a workpiece is positioned between first and second jaws of the jig and the drill bit is advanced along a guide and introduced into the workpiece to form a hole therein at a predefined angle. The drill bit can then be removed from the hole and the drill bit is held by the drill hold assembly to retain the drill bit in a fixed position with respect to the jig to thereby allow relative movement of the jig apparatus and workpiece whilst the drill bit is retained in position with the jig apparatus.

A countersinking tool, comprising a tool shank and a tool head with multiple deburring or countersinking edges and an insertion pin. In some embodiments, the insertion pin features at least one reaming edge, on a radially outer side and extends over less than 33% of the overall length of the insertion pin, wherein the reaming edge can be inserted into an unfinished bore with a diameter, smaller than a nominal diameter of the bore, in a cutting fashion, wherein the reaming edge acts as a drill bit and is arranged on the insertion pin at a radius that corresponds to the radius of a nominal diameter of the bore, and wherein the insertion pin has the nominal diameter of the bore and can be guided in the bore without play.

Also, a tool arrangement with a countersinking tool and to a method for producing a countersunk and/or deburred bore.

A depth limiting device for a drill includes a main body, an axial braking structure, and a limited shrinking structure. The axial braking structure is attached to the main body. The limited shrinking structure surrounds a drill rod of the drill, is slidably attached to the main body, and is in a home position or a compressed position. The axial braking structure axially brakes the drill rod such that the drill rod moves together with the depth limiting device. When the drill rod enters into a subject, the limited shrinking structure is pressed against the subject, moves from the home position to the compressed position, and stops the drill rod from entering further into the subject.

A power tool includes a housing, a motor, an output member driven by the motor, and a reaming attachment coupled to the output member. The reaming attachment has a front end portion selectively driven in rotation by the output member to drive a fastener into a workpiece, and a reaming portion selectively driven in rotation by the output member to remove material from an end surface of a conduit. A rotational motion sensor in the housing is operable to detect rotational motion of the housing about an axis. A controller receives a signal indicative of rotational motion from the sensor, determines a direction of the rotational motion of the housing, and drives the motor in a direction corresponding to the direction of rotational motion of the housing.