Abstract: Reamer instruments and related methods are disclosed for use in preparing bone, such as a glenoid bone surface, to receive an implant requiring one of two or more possible surface geometries. Described reamer instruments can have a modular or multi-component design. A minimal number of components can be particular to a particular required geometry, which can allow assembly and use of reamer instruments of the present disclosure to be flexible, intuitive, and efficient. In some embodiments, a disposable reamer head assembly can be driven by a disposable drive tip through a pin-on-pin connection. The remaining components of the reamer instrument can be sterilized and re-used. To prepare bone for a half-wedge implant, a half-wedge housing can be coupled to a reamer instrument handle and a depth stop can be coupled to the housing to achieve the required geometry. Alternatively, a full-wedge housing can be coupled to the instrument handle.

Abstract: A fastener with a reduced gear affect. The fastener of the present invention comprises a handle assembly having an end and an opening wherein a shaft assembly is positioned within the opening and extending from the opening. The fastener further comprises a switch assembly positioned between the handle assembly and the shaft assembly wherein the switch assembly reciprocates between a locked position and an unlocked position to control a ratio of revolutions between the handle assembly and the shaft assembly. A method of fastening comprising connecting a shaft assembly to a handle assembly and moving a switching assembly, connected to the handle assembly, to an unlocked position. Next, a gear assembly is connected to the switch assembly which engages the gear assembly to the handle assembly to increase a ratio of revolutions of the shaft assembly as compared to the handle assembly.

Abstract: A fastener with a reduced gear affect. The fastener of the present invention comprises a handle assembly having an end and an opening wherein a shaft assembly is positioned within the opening and extending from the opening. The fastener further comprises a switch assembly positioned between the handle assembly and the shaft assembly wherein the switch assembly reciprocates between a locked position and an unlocked position to control a ratio of revolutions between the handle assembly and the shaft assembly. A method of fastening comprising connecting a shaft assembly to a handle assembly and moving a switching assembly, connected to the handle assembly, to an unlocked position. Next, a gear assembly is connected to the switch assembly which engages the gear assembly to the handle assembly to increase a ratio of revolutions of the shaft assembly as compared to the handle assembly.

Abstract: A fastener with a torqued extension. The fastener comprises a handle having a first end and a second end and a shaft assembly connected to the second end and extending away from the second end. Additionally, an extension is rotatably connected between the handle and the shaft assembly wherein the extension rotates between a closed position and an open position to increase a torque force applied to the shaft assembly in the open position. A method of fastening comprising positioning a handle and a shaft and rotating an extension connected to the handle from a closed position to an open position; to apply a force to the extension in the open position to exert an increased torque to the shaft.

Abstract: In a method of timing a multi shot blast, a plurality of explosive charges each comprising a programmable detonator arrangement 14.1 to 14.n are positioned at a blast site. At a control center 11, the desired times of the shots in the blast are programmed into a transportable firing tool 13 and the tool is carried to each detonator arrangement where a dedicated data path is established between the tool and each detonator arrangement, one after the other. The charges are fired by loading data regarding the times on which the detonator arrangements must cause their associated charges to explode into each detonator arrangement, individually. The detonator arrangements are allowed to process the data and to cause their associated charges to explode when according to a clock in the detonator arrangement and the data stored in the arrangement it is time for the charge to explode.

Abstract: In a bearing and support for use either as a bearing, per se, or as a bearinged support for other items and incorporating the bearing of this invention; the bearing includes at least a pair of rotatable members that rotate or counter-rotate about a common axis, a shaft supporting the rotatable members for rotation about its common axis; roller, ball, sleeve, or other forms of bearing disposed between the rotatable members and the shaft to facilitate the rotation of the members therearound; a structural member incorporating a series of keepers upon its upper and lower edges and which retain races or tracks, and being disposed for having one of the rotatable members associated thereon to provide a bearing suspended support for holding other items, or the body of a person.

Abstract: An improved crossarm for use for holding gymnastic or other equipment, including a support for the invalid, the crossarm includes a series of cables that are suspended downwardly for holding a support for the gymnast or invalid, with the cables extending further upwardly for turning about sheaves associated with the approximate ends of the crossarm, and extending into for winding upon a cable holding device that is effective in retracting any cable in the event that slack occurs; the crossarm also is hingedly mounted, at its upper central portion, to provide for pivot of the crossarm in at least two directions to aid and be of convenience to the user.

Abstract: In a bearing and support for use either as a bearing, per se, or as a bearinged support for other items and incorporating the bearing of this invention; the bearing includes at least a pair of rotatable members that rotate or counter-rotate about a common axis, a shaft supporting the rotatable members for rotation about its common axis; roller, ball, sleeve, or other forms of bearings disposed between the rotatable members and the shaft to facilitate the rotation of the members therearound; a structural member incorporating a series of keepers upon its upper and lower edges and which retain races or tracks, and being disposed for having one of the rotatable members associated thereon to provide a bearing suspended support for holding other items, or the body of a person.

Abstract: In a bearing and support for use either as a bearing, per se, or as a bearinged support for other items and incorporating the bearing of this invention; the bearing includes at least a pair of rotatable members that rotate or counter-rotate about a common axis, a shaft supporting the rotatable members for rotation about its common axis; roller, ball, sleeve, or other forms of bearings disposed between the rotatable members and the shaft to facilitate the rotation of the members therearound; a structural member incorporating a series of keepers upon its upper and lower edges and which retain races or tracks, and being disposed for having one of the rotatable members associated thereon to provide a bearing suspended support for holding other items, or the body of a person.

Abstract: In a bearing and support for use either as a bearing, per se, or as a bearinged support for other items and incorporating the bearing of this invention; the bearing includes at least a pair of rotatable members that rotate or counter-rotate about a common axis, a shaft supporting the rotatable members for rotation about its common axis; roller, ball, sleeve, or other forms of bearings disposed between the rotatable members and the shaft to facilitate the rotation of the members therearound; a structural member incorporating a series of keepers upon its upper and lower edges and which retain races or tracks, and being disposed for having one of the rotatable members associated thereon to provide a bearing suspended support for holding other items, or the body of a person.

Abstract: In a bearing and support for use either as a bearing, per se, or as a bearinged support for other items and incorporating the bearing of this invention; the bearing includes at least a pair of rotatable members that rotate or counter-rotate about a common axis, a shaft supporting the rotatable members for rotation about its common axis; roller, ball, sleeve, or other forms of bearings disposed between the rotatable members and the shaft to facilitate the rotation of the members therearound; a structural member incorporating a series of keepers upon its upper and lower edges and which retain races or tracks, and being disposed for having one of the rotatable members associated thereon to provide a bearing suspended support for holding other items, or the body of a person.