Abstract: In a conveying pump having a cylinder introducible into a reservoir and having a pump piston, whereby the conveyed medium is supplied via an ascending line to a discharge line, an ascending line formed of two sections adjustable relative to one another is provided. The ascending line can be locked at different heights to vary the length of the ascending line so that the conveying pump can be used for reservoirs of different heights without deteriorating the conveying capacity of the pump. This adaptation can be performed easily and quickly. In addition, the conveying pump can be taken apart and easily cleaned, and component parts can be easily replaced.

Abstract: An apparatus for conveying paints is connectible via a supply passage to a reservoir and is connectible via a feed passage to an application device. The apparatus includes a diaphragm pump mounted in a closed housing and provided with an admission valve and a discharge valve. The diaphragm pump is driveable with an electric motor that can be switched by a manometric switch dependent on conveying pressure. The admission valve and the discharge valve are commonly arranged in a pump head and are held by a supporting element that is detachably connected to the pump head. Further, the discharge valve is located upsteam of a pressurized chamber that is connected to the feed passage and is also located in the pump head. Variations in feed passage pressure cause variations in the volume of the pressurized chamber by flexing a control diaphragm. The control diaphragm acts on an adjustment element to actuate a control switch. The invention provides an apparatus that is compact, reliable, and easy to manufacture.

Abstract: A device for controlling the quantity of a medium, such as paint, lacquer or adhesive emerging from a discharge nozzle of an equipment, such as a spray gun, which device includes a delivery chamber extending between the discharge nozzle and a pump housing which has a pump chamber connected at one end by an outlet valve to the delivery chamber and receives a reciprocating pump piston, with the delivery chamber including a control arrangement that will adjust the quantity of the medium flowing through the discharge nozzle and also prevent a dribble from the end of the nozzle during a return stroke of the pump piston.

Abstract: There is disclosed herein a liquid spray gun which includes an improved heat dissipation system and an improved leakage flow recirculating system.The improved heat dissipation system results from an improved and stronger air flow through the gun housing and around the electromagnetic coils. The improved air flow is created by a venturi or aspiration effect at the spray tip created by the action of the piston pump in spraying liquid at high velocity reducing the air pressure adjacent the tip. The internal portion of the housing communicates with the low pressure area so air in the housing is drawn from the housing to the low pressure area. Vents are provided in the housing adjacent the electromagnetic coils for outside air to be drawn into said housing over said coils and to the low pressure area, thus improving air flow and heat dissipation.

Abstract: A compact portable, easily operated, paint applying apparatus has a frame adapted to rest on the ground, a lifting handle on the frame for ease in carrying to use locations, a paint reservoir removably supported in upright position on the frame, an electric motor driven paint pump mounted on the frame above the reservoir, an intake tube depending from said pump into the reservoir, a discharge tube extending from the pump, and a paint applicator supplied by the discharge tube. The frame is preferably L-shaped with a bottom horizontal leg provided a sturdy base and an upright vertical leg. The horizontal leg has a well receiving the paint reservoir, the vertical leg has a recess receiving the rear end of a housing in which a reciprocal electric motor is mounted. The front end of the motor housing mounts a pump housing with a depending intake coupling directly over the paint reservoir on the horizontal base and an outlet coupling on the front end thereof.

Abstract: A reciprocating armature motor for electrically driving equipment such as a piston pump for a paint spray gun or a diaphragm compressor characterized by a stator having a solenoid, an armature pivotally mounted at one end to the stator and having a second end acting upon a member of the equipment to be actuated to move the member back and forth along a path when the armature moves relative to the stator with a reciprocating motion and an arrangement for controlling the reciprocating motor of the armature including a coupling link forming a positive link between the armature and a stationary element which coupling link moves depending on the reciprocating motion of the armature. In one embodiment, the coupling link is composed of a pair of pivotally connected arms forming an articulated link which interconnect the armature to the stationary element and coact with a stop to limit the movement of the armature toward the stator.

Abstract: An electrically-operated manual device, such as a nail driver, has an electric motor for actuating an axially-movable impact body. The motor is a vibrating armature AC motor having a single-sided movably arranged vibrating armature which, in dependence of the power supply frequency, acts with a high impact frequency on a low-mass impact body. The impact body is located in a stationary cylinder connected to a housing of the device and has a detachable adapter sleeve which receives a plunger activated via the impact body on a part to be driven. The configuration of the device makes it possible to construct a nail driver or the like with an extremely compact structure since the cylinder equipped with the impact body can be arranged immediately adjacent the vibrating armature AC motor. The power losses are negligible because the vibrating armature, swinging about an axis, acts directly on the low-mass impact body.

Abstract: A hand held household or hobby type spray gun is provided with a pistol grip housing having a transverse bore receiving a removable piston pump and nozzle assembly, suspending a removable container for the medium to be sprayed, and covered by a removable cap enclosing an electric motor for driving the piston of the pump. The pump and nozzle assembly is locked in the bore by a quarter turn rotation which seats a detent in a recess of the bore. The electric motor is energized from an external power source through a cord carried by the cap or from batteries which may be mounted in a chamber provided by the grip or handle portion of the housing. The housing may be a one-piece injection mold plastics material member, and the removable container for the media to be sprayed as well as the closure gap for the motor may also be injection mold plastic material members. The grip or handle portion of the housing span the rear side of the spray gun and has a front recess embracing the container.