Abstract: A respiratory treatment device comprising at least one chamber, a chamber inlet configured to receive exhaled air into the at least one chamber, at least one chamber outlet configured to permit exhaled air to exit the at least one chamber, and an exhalation flow path defined between the chamber inlet and the at least one chamber outlet. A restrictor member positioned in the exhalation flow path is moveable between a closed position, where a flow of exhaled air along the exhalation flow path is restricted, and an open position, where the flow of exhaled air along the exhalation flow path is less restricted. A vane in fluid communication with the exhalation flow path is operatively connected to the restrictor member and is configured to reciprocate between a first position and a second position in response to the flow of exhaled air along the exhalation flow path.

Abstract: A mechanical pump includes a motor with an output shaft, a cam coupled to the output shaft for rotating the cam when the motor is energized, and a driver with spaced ledges engaging the cam and driven linearly by the rotating cam. The piston is driven by the driver. A cylinder receives the piston therein and includes an inlet section for drawing fluid into the cylinder and an outlet section for pumping fluid out of the cylinder as the piston reciprocates in the cylinder.

Abstract: A mechanical pump includes a motor with an output shaft, a ca coupled to the output shaft for rotating the cam when the motor is energized, and a driver with spaced ledges engaging the cam and driven linearly by the rotating cam. The piston is driven by the driver. A cylinder receives the piston therein and includes an inlet section for drawing fluid into the cylinder and an outlet section for pumping fluid out of the cylinder as the piston reciprocates in the cylinder.

Abstract: A mechanical pump includes a motor with an output shaft, a cam coupled to the output shaft for rotating the cam when the motor is energized, and a driver with spaced ledges engaging the cam and driven linearly by the rotating cam. The piston is driven by the driver. A cylinder receives the piston therein and includes an inlet section for drawing fluid into the cylinder and an outlet section for pumping fluid out of the cylinder as the piston reciprocates in the cylinder.

Abstract: A catcher's mask comprises a two-piece plastic shell composed of a rigid front shell and a rigid rear shell. The front and rear shells are connected by a strap harness attached to the front shell and have padding assemblies. The front shell has ventilation holes including ear holes positioned over the wearer's ears and a full jaw protector integrally formed as part of front shell. A wire faceguard is removably attached to the front shell extending over the ear holes. A top upper member of the faceguard comprises a center bar part, a left side bar part bent upwardly with respect to the center bar part to form a left eyebrow area, and a right side bar part bent upwardly with respect to the center bar part to form a right eyebrow area.

Abstract: A catcher's mask comprises a two-piece plastic shell composed of a rigid front shell and a rigid rear shell. The front and rear shells are connected by a strap harness attached to the front shell and have padding assemblies. The front shell has ventilation holes including ear holes positioned over the wearer's ears and a full jaw protector integrally formed as part of front shell. A wire faceguard is removably attached to the front shell extending over the ear holes. A top upper member of the faceguard comprises a center bar part, a left side bar part bent upwardly with respect to the center bar part to form a left eyebrow area, and a right side bar part bent upwardly with respect to the center bar part to form a right eyebrow area.

Abstract: A catcher's mask comprises a two-piece plastic shell composed of a rigid front shell and a rigid rear shell. The front and rear shells are connected by a strap harness attached to the front shell and have padding assemblies. The front shell has ventilation holes including ear holes positioned over the wearer's ears and a full jaw protector integrally formed as part of front shell. A wire faceguard is removably attached to the front shell extending over the ear holes. A top upper member of the faceguard comprises a center bar part, a left side bar part bent upwardly with respect to the center bar part to form a left eyebrow area, and a right side bar part bent upwardly with respect to the center bar part to form a right eyebrow area. The rear shell has a concave padding assembly comprised of a concave TPU shock absorbing layer, and a nested concave comfort layer.

Abstract: A catcher's mask comprises a two-piece plastic shell composed of a rigid front shell and a rigid rear shell. The front and rear shells are connected by a strap harness attached to the front shell and have padding assemblies. The front shell has ventilation holes including ear holes positioned over the wearer's ears and a full jaw protector integrally formed as part of front shell. A wire faceguard is removably attached to the front shell extending over the ear holes. A top upper member of the faceguard comprises a center bar part, a left side bar part bent upwardly with respect to the center bar part to form a left eyebrow area, and a right side bar part bent upwardly with respect to the center bar part to form a right eyebrow area. The rear shell has a concave padding assembly comprised of a concave TPU shock absorbing layer, and a nested concave comfort layer.

Abstract: A catcher's mask comprises a two-piece plastic shell composed of a rigid front shell and a rigid rear shell. The front and rear shells are connected by a strap harness attached to the front shell and have padding assemblies. The front shell has ventilation holes including ear holes positioned over the wearer's ears and a full jaw protector integrally formed as part of front shell. A wire faceguard is removably attached to the front shell extending over the ear holes. A top upper member of the faceguard comprises a center bar part, a left side bar part bent upwardly with respect to the center bar part to form a left eyebrow area, and a right side bar part bent upwardly with respect to the center bar part to form a right eyebrow area. The rear shell has a concave padding assembly comprised of a concave TPU shock absorbing layer, and a nested concave comfort layer.

Abstract: A lawnmower uses thin, replaceable blades with a hardened cutting edge and a cross-section defining an airfoil retained in cartridges that are inserted and removed from rotors in a blade assembly at need. The cartridges comprise a blade and rotor interlocking elements affixed to the blade, each rotor interlocking element corresponding to one rotor in the blade assembly. Each rotor and rotor interlocking element includes features that allow the two to be securely engaged so that the rotors may be spun quickly in a mower blade assembly to cut grass.

Abstract: A catcher's mask comprises a two-piece plastic shell composed of a rigid front shell and a rigid rear shell. The front and rear shells are connected by a strap harness attached to the front shell and have padding assemblies. The front shell has ventilation holes including ear holes positioned over the wearer's ears and a full jaw protector integrally formed as part of front shell. A wire faceguard is removably attached to the front shell extending over the ear holes. A top upper member of the faceguard comprises a center bar part, a left side bar part bent upwardly with respect to the center bar part to form a left eyebrow area, and a right side bar part bent upwardly with respect to the center bar part to form a right eyebrow area. The rear shell has a concave padding assembly comprised of a concave TPU shock absorbing layer, and a nested concave comfort layer.

Abstract: A catcher's mask comprises a two-piece plastic shell composed of a rigid front shell and a rigid rear shell. The front and rear shells are connected by a strap harness attached to the front shell and have padding assemblies. The front shell has ventilation holes including dual ear holes positioned over the wearer's ears and a full jaw protector integrally formed as part of front shell. A wire faceguard is removably attached to the front shell extending over the ear holes. A front liner is installed in the brow area, crown area, and side areas of the front shell, a middle liner extending around the rear inner surface of the front shell, a suspended foam jaw pad, and a central chin pad. The rear shell has a concave padding assembly comprised of a concave TPU shock absorbing layer, and a nested concave comfort layer.

Abstract: A catcher's mask comprises a two-piece plastic shell composed of a rigid front shell and a rigid rear shell. The front and rear shells are connected by a strap harness attached to the front shell and have padding assemblies. The front shell has ventilation holes including dual ear holes positioned over the wearer's ears and a full jaw protector integrally formed as part of front shell. A wire faceguard is removably attached to the front shell extending over the ear holes. A front liner is installed in the brow area, crown area, and side areas of the front shell, a middle liner extending around the rear inner surface of the front shell, a suspended foam jaw pad, and a central chin pad. The rear shell has a concave padding assembly comprised of a concave TPU shock absorbing layer, and a nested concave comfort layer.

Abstract: A mechanical pump includes a motor with an output shaft, a cam coupled to the output shaft for rotating the cam when the motor is energized, and a driver with spaced ledges engaging the cam and driven linearly by the rotating cam. The piston is driven by the driver. A cylinder receives the piston therein and includes an inlet section for drawing fluid into the cylinder and an outlet section for pumping fluid out of the cylinder as the piston reciprocates in the cylinder.

Abstract: Paper cutting mechanisms for cutting paper in a printing device including a drive mechanism, a cutting device coupled to the drive mechanism, and a retention mechanism including a trigger and a retaining portion configured to mechanically interact with the cutting device to selectively deploy the retention mechanism to retain the paper. In some examples, paper cutting mechanism includes a trigger including an elbow, a first arm extending from the elbow, and a second arm extending from the elbow offset from the first arm, and a rotation shaft extending from the elbow transverse to a plane defined by the first arm and the second arm. In some further examples, the paper cutting mechanism includes a resilient member cooperatively coupled with a paper engaging end of the retaining portion.

Abstract: Paper cutting mechanisms for cutting paper in a printing device including a drive mechanism, a cutting device coupled to the drive mechanism, and a retention mechanism including a trigger and a retaining portion configured to mechanically interact with the cutting device to selectively deploy the retention mechanism to retain the paper. In some examples, paper cutting mechanism includes a trigger including an elbow, a first arm extending from the elbow, and a second arm extending from the elbow offset from the first arm, and a rotation shaft extending from the elbow transverse to a plane defined by the first arm and the second arm. In some further examples, the paper cutting mechanism includes a resilient member cooperatively coupled with a paper engaging end of the retaining portion.