초록 ▼

A compact transportable compressed-air piston engine for paint-spraying devices, dosing pumps, grease guns or the like, makes it possible, without much effort, to carry out various length working strokes of a working piston. A compact engine is obtained by mounting the control in/on the cylinder hea

A compact transportable compressed-air piston engine for paint-spraying devices, dosing pumps, grease guns or the like, makes it possible, without much effort, to carry out various length working strokes of a working piston. A compact engine is obtained by mounting the control in/on the cylinder head or in/on the cylinder bottom with axes extending transversely with respect to a main axis so that stroke changes can be achieved solely by the working piston contacting the valve piston rods of switch valves. In addition, return springs are not needed in the switch valves, which are required for reversing and are operated by the working piston.

대표청구항 ▼

[ The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:] [1.] A compressed-air piston engine, comprising a piston cylinder, a working piston mounted in the piston cylinder with a working piston rod, the working piston being moved alternately

[ The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:] [1.] A compressed-air piston engine, comprising a piston cylinder, a working piston mounted in the piston cylinder with a working piston rod, the working piston being moved alternately loaded, and thus oscillated in the piston cylinder by compressed air acting on its two piston surfaces by means of a slide control, the working piston rod being axially guided in at least one of a cylinder head and a cylinder bottom, in which an inlet/outlet is provided for compressed-air supply and discharge into/out of the piston cylinder, whereby the slide control includes a control piston movable in a control cylinder, and control openings are provided in the control cylinder, the control openings fluidly connecting supply/discharge pipelines for the compressed air to the control cylinder, and being influenced by the control piston, a switch valve for the compressed air in each of the cylinder head and the cylinder bottom, the switch valves being operated by the working piston for switching the slide control, the switch valves each having a valve piston rod projecting into the piston cylinder and operable by the working piston of the compressed-air piston engine, each of the switch valves having a differential slide, the differential slides each including a first valve piston having a larger piston surface and a second valve piston having a smaller piston surface, which are fastened at a fixed distance in alignment on the valve piston rod so that air pressure from a branch pipeline received in a valve housing moves the differential slide into a first end position wherein the valve piston rod projects partially into the piston cylinder.