Abstract: A microneedle has a proximal end portion and a distal end portion and defines a lumen. The proximal end portion is configured to be coupled to a cartridge to place the lumen in fluid communication with the cartridge. The proximal end portion includes a base surface that is configured to be placed in contact with a surface of a target tissue. The distal end portion of the microneedle includes a beveled surface. The beveled surface defines a tip angle of less than about 20 degrees and a ratio of a bevel height to a bevel width of less than about 2.5.

Abstract: A microneedle has a proximal end portion and a distal end portion and defines a lumen. The proximal end portion is configured to be coupled to a cartridge to place the lumen in fluid communication with the cartridge. The proximal end portion includes a base surface that is configured to be placed in contact with a surface of a target tissue. The distal end portion of the microneedle includes a beveled surface. The beveled surface defines a tip angle of less than about 20 degrees and a ratio of a bevel height to a bevel width of less than about 2.5.

Abstract: A microneedle has a proximal end portion and a distal end portion and defines a lumen. The proximal end portion is configured to be coupled to a cartridge to place the lumen in fluid communication with the cartridge. The proximal end portion includes a base surface that is configured to be placed in contact with a surface of a target tissue. The distal end portion of the microneedle includes a beveled surface. The beveled surface defines a tip angle of less than about 20 degrees and a ratio of a bevel height to a bevel width of less than about 2.5.

Abstract: The furnace has a feeding channel (4) through which firewood is transported into a fire chamber (3). A steam pipe (10) leads into the channel (4). Through said pipe (10), steam is introduced into the solid fuel material in bursts as soon as a certain temperature is exceeded within the said channel (4). The steam increases the humidity in the air and the moisture of the firewood, thereby reliably preventing a spreading of the fire within the feeding channel (4), without simultaneously impairing combustion within the fire chamber (3).

Abstract: A ram is connected to reciprocate its free end up to or into a reinforced aperture in the bottom of one side wall of a wood receiving container to break wood positioned therebetween and push it through the aperture into a feed duct that is connected at its opposite end to the fire chamber of a furnace. The bottom of the container has a higher region and a lower region that is positioned adjacent the aperture and transverse of the ram and which extends either approximately horizontal or inclined downwardly away from both sides of the ram. Pusher flaps with actuating devices are pivotally connected to push material across the regions of the bottom toward the path of the ram and a member pivoted on the side-wall above the aperture is actuated to press material downwardly into the ram path in front of the aperture.

Abstract: An elongate combustion chamber is inclined at a 50.degree. to 80.degree. angle to the vertical, is connected at the lower end face to a feed duct through which fuel is pushed into the chamber and is open at the upper end face. The side walls forming the lower part of the chamber are downwardly converging and the free edges are spaced from each other at a distance decreasing in the direction of the open upper end face from the lower end face to form a primary air opening from a primary air channel therebeneath, the tapered opening covered by corresponding downwardly converging solid side walls connected at an apex and spaced from the other walls to form an air passage therebetween from the primary air channel to the combustion chamber.