Abstract: A hand-held automatic drilling machine includes an expandable locating collet or locating pin, a pair of adjustably mounted drill bits for simultaneously drilling a pair of spaced-apart openings in a workpiece and a rotary drive motor for the drill bits. The machine also includes a first drive assembly for activating the expandable collet and a second drive assembly for advancing the drill bits into the workpiece. An adjustable dashpot provides resistance to the second drive assembly, thereby controlling the force applied to the drill bits and thus the feed rate. A bi-stable control valve commences the drilling cycle in one state and sequentially activates the first drive assembly and the second drive assembly. A full depth sensor moves the control valve to the opposite state, sequentially deactivating the second drive assembly and the first drive assembly.

Abstract: A peck feed drilling machine incorporates a pneumatically operated vane motor and peck feed components. The vane motor drives a conventional drill bit through a speed reducing gear train. The peck feed assembly includes a plurality of multi-state shuttle valves which cooperate with a drilling feed piston, a peck piston and a clutch assembly to incrementally advance and fully retract the drill bit to peck drill an aperture. The drilling machine also includes a dashpot which adjusts the feed rate of the drill bit, a second dashpot for slowing the drill bit as it breaks through the workpiece and countersinks, a threaded mechanism for adjusting the depth of drilling and a spring mechanism for slowing the advance of the drill bit just before it engages the workpiece.

Abstract: A novel and improved cover assembly for an air moving device such as a fan or air conditioner mounted in a wall or ceiling for drawing air therethrough. To prevent cold air from leaking through the device, the improved cover assembly is detachably connected by magnetic means to the rim of the device. The cover assembly is made of insulating material and has a plurality of recesses or channels formed on the internal side thereof extending in spaced relation to each other from the outer edge of each of the inner recesses so that a wide range of rims can be served by one size cover assembly. Depending on the rim size or shape (rectangular, square or circular) the cover assembly can be "fitted" to any rim in question by removing the excess material at the appropriate line of perforations.

Abstract: A vacuum cleaner tool is removably mounted on the elongated wand of a conventional vacuum cleaner. The tool includes a head or main housing having a forwardly-disposed brush enclosure portion with a lower planar opening formed therein. A brush is rotatably journaled in the brush enclosure portion of the housing and protrudes below the opening therein. An air turbine is rotatably journaled in the housing and is drivingly connected to the brush. The axis of the housing is coincident with the axis of the wand, and both are arranged at 45 degrees with respect to the planar opening for the brush. In one position, the planar opening is in a horizontal plane. The mounting means between the housing and the wand includes a swivel member. This swivel member enables the housing to be rotated 180 degrees with respect to the wand. When so rotated, the planar opening for the brush is in a vertical plane.

Abstract: A vacuum cleaner tool is provided which comprises a housing and a motor positioned in the housing, the motor having a driving pulley connected to the output thereof. A rotary agitator brush is mounted in the housing and has a portion thereof extending from the housing for contacting a surface to be vacuumed. The brush has an axle which extends therefrom along the axis thereof. A drive belt couples the pulley to the brush and an end cap is mounted on the axle of the brush for mounting the brush in the housing in two positions. The brush extends a smaller distance from the housing in the first of the two positions. The center of the end cap is positioned with respect to the axis of the brush such that when the cap is rotated 180.degree., the brush is shifted between the two positions while the distance from the center of the pulley to the axis of the brush is maintained constant.

Abstract: A vacuum cleaner floor tool is provided which comprises a housing, an air-powered turbine motor in the housing and an agitator partially extending from the housing. The agitator has spiral grooves therein which hold agitating devices, such as brushes or beater bars, and one end of the agitator is reduced or turned down to form a reduced diameter portion. The diameter of the reduced diameter portion is such that the spiral grooves form substantially flat surfaces and these surfaces are engaged by lugs on a connector fitted over the reduced portion. A transmission belt interconnects the connector with the turbine motor in order to drive the agitator. The floor tool has a removable base plate mounted on the housing which forms one wall thereof, and the agitator extends from the housing through an opening in the base plate.

Abstract: A vacuum cleaner floor tool is provided which comprises a housing formed by upper and lower members which mate with one another along a single plane inclined with respect to the base plane or bottom of the lower member. An air-powered turbine motor is positioned in the housing and includes a turbine chamber for the turbine motor, and a rotary floor agitator is provided which partially extends from the housing. The agitator is coupled to the turbine motor and is driven thereby. A base plate is removably mounted on the housing and forms a portion of a wall thereof, with the agitator extending from the housing through an opening in the base plate. Air passes through the opening in the base plate into the turbine chamber. The base plate includes a ramp which extends from the base plate into the housing, where the ramp and a portion of the turbine chamber form a nozzle for the turbine motor.

Abstract: A seal is provided for sealing first and second mating surfaces. The seal comprises a channel in the first surface with a first projection in the bottom of the channel projecting upward towards the first surface. A second projection projects from the second surface towards the first surface and the second projection is aligned with the channel in the first surface. A gasket is positioned between the first and second surfaces at least partially within the channel, the first and second projections contacting the gasket and deforming the gasket at the points of contact thereof.

Abstract: A turbine housing is formed which comprises a plurality of housing members. The distance between mating portions of opposite side walls of one housing member is a first distance and the distance between mating portions of opposite side walls at one end of an adjacent member in the direction of fluid flow in the turbine is greater than or equal to the first distance. The distance between the mating portions of opposite side walls at the other end of the adjacent member is less than or equal to the first distance. Further, the distance from the axis of the housing to the mating portion of the circumferential wall which connects opposite side walls of the one housing member is less than or equal to the radial distance to the circumferential wall at the one end of the adjacent member and the distance to the circumferential wall at the other end of the adjacent member is less than or equal to the distance from the axis of the circumferential wall of the one housing member.

Abstract: A portable, cordless, electrically energized grass trimming device is disclosed having a rotary cutter blade which is formed of a flexible strip of material and which is mounted for rotation over a predetermined course. A blade stabilizing means is provided for restraining the blade along a segment of its length for maintaining rotary motion of the blade in the predetermined course upon impact with other objects. The flexibility of the blade is enhanced by mounting the blade for rotation over a course described by a curved surface of revolution and blade durability is improved by providing a means for absorbing impact shock when the blade strikes an object. An improved blade is described having integrally formed resilient means for absorbing the shock of impact.