Abstract: A vacuum shield assembly and related vacuum system intended for attachment to an existing medical mask for oxygen delivery, air suction, nebulization, BIPAP, and/or CPAP. The vacuum shield assembly generally comprises a shield body and a retaining assembly. The retaining assembly may attach the vacuum shield assembly to a vacuum tube of the existing mask, which may be connected to a negative pressure vacuum system. The retaining assembly may also be attached to a nebulizer unit or component thereof, or to an oxygen supply tube of a BIPAP or CPAP mask, or a mask configured for oxygen delivery. The shield body may comprise a lower segment, which may comprise a connecting component configured and dimensioned for attachment to, and for a fluid communication, with the retaining assembly. The shield body may be configured and dimensioned to correspond to the geometry of the existing mask.

Abstract: A system, comprising a panel comprising a tetrahedral-octahedral honeycomb lattice, a skin layer formed on a first side of the lattice, having an aperture formed therein configured to receive a fastener, and a fastening assembly comprising a fastener configured to be mounted to the panel when the panel is fixed to an adjacent component, and a hardening material. Corresponding systems and methods also are disclosed.

Abstract: A kinetic log splitter having: a frame; a geared rack; a pinion coupled with the geared rack and to cause the geared rack to translate linearly based on rotation of the pinion; an actuation handle that engages the geared rack and the pinion; and a linkage system coupling the actuation handle to the geared rack that allows disengagement of at least a portion of the linkage system in response to a stall condition that occurs due to a stall of the geared rack during the operation of the geared rack of the kinetic log splitter. The kinetic log splitter may be towable and/or include a push plate splinter recovery system.

Abstract: An octahedral space frame includes a first plurality of double octahedral structures disposed in a first row in a longitudinal direction, adjacent ones of the first plurality of double octahedral structures sharing two common members. Each of the first plurality of double octahedral structures includes respective first and second single octahedron structures joined in a transverse direction and sharing three common members, the transverse direction being orthogonal to the longitudinal direction.

Abstract: Embodiments provide a log splitter with an extendable, or otherwise movable, work zone to increase the accessibility of the work zone for a user and improve movability of the log splitter. The log splitter may be configurable to be in an extended position, a compact position, a vertical position, or a moving position. In the extended position, the log splitter may split logs in a horizontal direction, and in the vertical position the log splitter may split logs in a vertical direction. When the log splitter is in the moving position and/or the compact position an operator of the log splitter may manually move the log splitter to a new position and/or location, or tow the log splitter with a vehicle.

Abstract: A log splitter where splitting force is generated by storing kinetic energy in a rotating flywheel. Rotational energy is converted to splitting force by means of a rack and pinion, which is coupled to the flywheels through a belt-driven clutch system. A belt rests around a driven sheave and a drive sheave. An idler pulley tensions the belt, causing the driven pulley to rotate. The idler pulley is attached to an actuation handle causing the idler to lock, by means of a latch, until the operator disengages the pulley, or until a component mounted to the rack forces the latch to disengage. The rack remains engaged to the pinion by a bearing mounting system. A spring bumper may be placed at the end of travel so that at the end of the stroke, the ram mechanism compresses the spring, and uses stored energy to reverse the ram, pinion and sheave.

Abstract: A kinetic log splitter having: a frame; a geared rack; a pinion coupled with the geared rack and to cause the geared rack to translate linearly based on rotation of the pinion; an actuation handle that engages the geared rack and the pinion; and a linkage system coupling the actuation handle to the geared rack that allows disengagement of at least a portion of the linkage system in response to a stall condition that occurs due to a stall of the geared rack during the operation of the geared rack of the kinetic log splitter. The kinetic log splitter may be towable and/or include a push plate splinter recovery system.

Abstract: Embodiments provide a log splitter with an extendable, or otherwise movable, work zone to increase the accessibility of the work zone for a user and improve movability of the log splitter. The log splitter may be configurable to be in an extended position, a compact position, a vertical position, or a moving position. In the extended position, the log splitter may split logs in a horizontal direction, and in the vertical position the log splitter may split logs in a vertical direction. When the log splitter is in the moving position and/or the compact position an operator of the log splitter may manually move the log splitter to a new position and/or location, or tow the log splitter with a vehicle.

Abstract: A toothbrush that includes a brushing attachment and a handle is described. The brushing attachment includes a main body portion that includes a hollow neck and a head. The neck includes a skirt portion with an attachment opening and the head includes a cleaning member opening. The handle includes a main body portion that houses a motor, and a male attachment member extending upwardly from the main body portion that is at least partially received in the attachment opening in the brushing attachment. The male attachment member includes at least a first retention rib that is received in a first retention recess defined in the inner surface of the neck of the brushing attachment, and the inner surface of the neck includes a first retention lug extending outwardly therefrom that is positioned below the first retention rib.

Abstract: A toothbrush that includes a brushing attachment and a handle. The brushing attachment includes a main body portion with a hollow neck having an attachment opening and a head with a cleaning member opening, a drive shaft positioned in the neck, a cleaning member drive mechanism matingly engaged with gearing on the drive shaft, and a cleaning member extending through the cleaning member opening in the head and operatively associated with the cleaning member drive mechanism. The drive shaft includes a spline drive on one end and gearing on the opposite end. The handle includes a main body portion with a brushing attachment connection receiver that is at least partially received in the attachment opening. The brushing attachment connection receiver includes a recess defined therein that receives a drive hub with a grooved recess defined therein that receives the spline drive.

Abstract: A log splitter where splitting force is generated by storing kinetic energy in a rotating flywheel. Rotational energy is converted to splitting force by means of a rack and pinion, which is coupled to the flywheels through a belt-driven clutch system. A belt rests around a driven sheave and a drive sheave. An idler pulley tensions the belt, causing the driven pulley to rotate. The idler pulley is attached to an actuation handle causing the idler to lock, by means of a latch, until the operator disengages the pulley, or until a component mounted to the rack forces the latch to disengage. The rack remains engaged to the pinion by a bearing mounting system. A spring bumper may be placed at the end of travel so that at the end of the stroke, the ram mechanism compresses the spring, and uses stored energy to reverse the ram, pinion and sheave.

Abstract: A toothbrush that includes a brushing attachment and a handle. The brushing attachment includes a main body portion with a hollow neck having an attachment opening and a head with a cleaning member opening, a drive shaft positioned in the neck, a cleaning member drive mechanism matingly engaged with gearing on the drive shaft, and a cleaning member extending through the cleaning member opening in the head and operatively associated with the cleaning member drive mechanism. The drive shaft includes a spline drive on one end and gearing on the opposite end. The handle includes a main body portion with a brushing attachment connection receiver that is at least partially received in the attachment opening. The brushing attachment connection receiver includes a recess defined therein that receives a drive hub with a grooved recess defined therein that receives the spline drive.

Abstract: A toothbrush that includes a brushing attachment and a handle is described. The brushing attachment includes a main body portion that includes a hollow neck and a head. The neck includes a skirt portion with an attachment opening and the head includes a cleaning member opening. The handle includes a main body portion that houses a motor, and a male attachment member extending upwardly from the main body portion that is at least partially received in the attachment opening in the brushing attachment. The male attachment member includes at least a first retention rib that is received in a first retention recess defined in the inner surface of the neck of the brushing attachment, and the inner surface of the neck includes a first retention lug extending outwardly therefrom that is positioned below the first retention rib.

Abstract: A toothbrush that includes a brushing attachment and a handle. The brushing attachment includes a main body portion with a hollow neck having an attachment opening and a head with a cleaning member opening, a drive shaft positioned in the neck, a cleaning member drive mechanism matingly engaged with gearing on the drive shaft, and a cleaning member extending through the cleaning member opening in the head and operatively associated with the cleaning member drive mechanism. The drive shaft includes a spline drive on one end and gearing on the opposite end. The handle includes a main body portion with a brushing attachment connection receiver that is at least partially received in the attachment opening. The brushing attachment connection receiver includes a recess defined therein that receives a drive hub with a grooved recess defined therein that receives the spline drive.