Improved Means for Preventing or Arresting the Passage of Liquid along with or along Reciprocating Rods and for Preventing the Splashing of such Rods

13,323. Lloyd, G. E. June 12. Piston pumps.-Relates to means for protecting reciprocating rods, such as pump-rods, from being splashed with oil or other liquids. The rod is enclosed in a casing, which may be fixed, or may move with the rod. In the arrangement shown in Fig. 1, the casing 4 is fixed to the stationary screen 3, and within it moves a shield 5 screwed on the rod 1. Liquid falling on to the shield can escape at the bottom through openings 6, and at the top through openings 6, provided with hoods or baffles. The tube may be secured to the rod, and slide through the screen 3. Fig. 5 shows an arrangement in which the casing is made in three sections, one of which is attached to the crosshead, and another to the cylinder cover. The middle section is moved by levers 11 through half the stroke of the piston. Valves, opening in one direction only, may be fitted to admit air to the annuli between the sections. The air escapes between them. The joint-making rings 6, Fig. 15, between the sections may be grooved at 35 and 36 to remove liquid from the inner tubes. Perforations 36 allow the liquid to escape from the bottom of the groove 36. When there are more than three sections, the intermediate ones may be moved the required distance by pantographic devices. In cases where the rod is liable to be splashed from one direction only, the unnecessary parts of the tubular casing may be removed. Fig. 16 shows an arrangement in which the crosshead has cylindrical slippers 37, sliding in a cylindrical guideway. A screen 3, which may be a part of the engine casing, prevents liquid from reaching the piston-rod from outside the guideway, and a shield 5, fitting the guideway, prevents liquid from passing to the rod inside the gnideway. A cup 40 catches any liquid dropping from the stuffing-box. In Fig. 18, the crosshead itself is arranged to form the shield, and is grooved at 41 to prevent the passage of liquid. A self-adjusting lip 42 may be placed in the guideway.