Patent GB-898517-A (GB)
Title: Improvements relating to automatic lubricating systems
IPC: F16N25/02
Filed: 1960-10-21
Abstract: 898,517. Lubricating. TRABON ENGINEERING CORPORATION. Oct. 21, 1960 [April 4, 1960], No. 36209/60. Class 12 (3). A lubricating system for proportioning lubricant between a number of stations, has a lubricant supply and at least three valve/plunger units of a first type and one or more valve/ plunger units of a second type. Each unit of each type has chambers 16, 17, Figs. 16 and 18, t herein containing inter-connected pistons 26, 27 which are hydraulically opposed to each other, and the unit also has single ports 21-24 and passages therein. A plunger 45 has the pistons 26, 27 and flanges thereon which register with the ports 21-24. The units also have double-ports 25A, 25B therein which lead to passages 91, 92. The units 10, 13 and 14, Fig. 1 ,are of the first type and the units 11, 12 and 15 are of the second type and are located between an inlet end-block 47 and an end-cap 48. The inlet end block 47 and the units each have a supply bore 43 therethrough and the end-cap 48 has crossed-over connecting passages therein. In operation, lubricant from the bore 43 passes through passages and ports 35, 30, 25, 21 and 31 of the unit 10, through a passage in the end block 47 connecting to a passage 65 leading through the assembly to the crossed-over passage of the end cap 48 so that the lubricant is passed along passage 92 of the unit 15 and into the chamber 17 therein. The piston 27 is moved upwards, thus causing lubricant to be forced out of the chamber 16 and along a passage 91 of the unit 15, through the crossed-over connection in the cap 48 and along a passage 66 leading through the assembly to the block 47 and then through passages and ports 32, 22, 24, 34 in the unit 10. The lubricant continues through the block 47, a passage leading through the assembly, to and through the cap 48 and to a passage 82 of the unit 15. Meanwhile, the port 25B, of the unit 15, connects with the port 22 through the valve 30 and joins a passage 32. Lubricant flows from the chamber 17, through the passage 32 of the unit 15 and along passage 92 of the unit 14 to fill 'the chamber 17 therein. Lubricant is expelled from chamber 16 of the unit 14 to the passage 91 and through passages and ports 31, 21, 23, 34 of the unit 14. The lubricant then passes through a passage 82 of the unit 14. Meanwhile, the ports 25, 22 of the unit 14 are connected and lubricant is admitted through inlet bore 43 and is passed through passages and ports 35, 30, 25, 22, 32 of the unit 14. The lubricant passes through a passage 92 to the chamber 17 of the unit 13 and moves the piston 26 upwards to expel lubricant from the chamber 16 of the unit 13. The lubricant passes along passage 91 of the unit 13 and then through the passages and ports 31, 21, 23, 33 of the unit 14. The lubricant then passes out through the line 81 of the unit 13. Simultaneously, the unit 13 is functioning with the unit 12, the unit 12 is functioning with the unit 11, the unit 11 is functioning with the unit 10, the unit 10 is functioning with the unit 15, the unit 15 is functioning with the unit 14, the unit 14 is functioning with the unit 13, the unit 13 is functioning with the unit 12, the unit 12 is functioning with the unit 11, and the unit 11 is functioning with the unit 10, thus the complete cycle of lubricant distribution has taken place and is ready to be repeated. The Specification describes two embodiments where the units are positioned to form a circle, porting relationships, and an alternative plunger which can change the porting relationships. Specification 757,544 is referred to.