GB426333A - Improvements in distributing-valves and valve gear for compressed-air power cylinders - Google Patents

Abstract

426,333. Reciprocating pumps. LOGETTE, A. I., and DAINTON, E. H., Skyhi Works, Standard Road, Park Royal, London. Sept. 2, 1933, No. 24423. [Class 102 (i)] [See also Group XXVI] The power cylinders of air motors, air pumps, &c. are operated by compressed air distributed by separate inlet and exhaust valves 4, 5 operated by spring-actuated slides 1 provided with a cam surfaces 16 for lifting the inlet valve and tappet means for operating the exhaust valves. The valve-gear rod 19 has a head operating between springs s, s arranged in the piston of the power cylinder r, and is connected to the slide 1 which has grooves engaged by spring-pressed plungers 21 in the two positions of the rod. A spring-pressed exhaust valve 5 is housed in the end of a perforated cap 10 screwed on the casing, and has a stem provided with a pin 5d operated by the ends of a slot 18 in the slide. A bore 11 in the slide, ending in ports 12, 13, puts the cylinder into communication with the valvechest. Grooves in the slide head 1<a> permit the exhaust of fluid. The piston q<1>, q<2> is acted on by a spring r<1>, and is connected to a plunger p of a lubricating-pump arranged above a grease container a provided with a plunger b subject to air-pressure on its right-hand side, and communicating with the pump barrel on its left-hand side. The head d of the container is provided with a yoke f to receive a handscrew e. The power cylinder r is supported by a strap a<2> and a boss k2 on the pump barrel. The container a is mounted on castors x. In the arrangement shown in Fig. 4, a compressedair operated pump is connected with a highpressure delivery chamber c to form lubricating- apparatus for use with a grease keg a. The pump barrel ax is mounted upon a base d which rests upon the keg which is mounted upon a platform a<1> provided with castors a<2>. The casing e at the bottom of the barrel has an inlet valve f and a ball discharge valve g. Two pistons i, i<1> connected by a rod i<2> are provided. The upper piston is operated by compressedair and spring j. The springs s, s<1> which operate the rod 19 are housed in the rod i<2>. Compressed air is supplied to the chests by pipes 9, 9<a>. The piston i forces grease from the barrel a<x> to the chamber c where it is acted on by the plunger p.