GB642922A - Lubrication - Google Patents

Abstract

642,922. Reciprocating pumps. AUTO RESEARCH CORPORATION. Aug. 8,1947, No. 21876. Convention date, July 3, 1940. [Class102(i)] [Also in Groups XXIX and XXXIV] In a central lubricating system comprising a pump F supported by a bracket 37 within a reservoir 10 and supplying lubricant to a branched conduit system having a plurality of flow restriction outlets, the lubricant pressure in the system may be varied by means of an adjustable bye pass device comprising a needle valve H, and independent means are provided for closing the byepass duct so as to increase the pressure in the system. The pump F comprising a reciprocating plunger 48, inlet check valve 51, inlet strainer 58 and outlet check valve 63 is actuated by an oscilating shaft 82 having a member 86 secured thereto with a fork 88 engaging a connecting rod 95. Lubricant drawn through inlet check valve 51 is forced through outlet check valve 63 to a chamber 70 via pipe 65. The lower end of chamber 70 is connected by tubing 74 to an outlet 79 to which is connected the branched conduit system 176 having a purality of flow metering devices J which are of the pin-in-bore restriction type. Chamber 70 is in communication with a chamber 33 on the reservoir cover by means of an adjustable needle valve H, Fig. 4, comprising a body 140, in the lower part of which is disposed a check valve 143, the middle part being conical to receive the needle valve 147. The conical needle 147 has a flat 148 thereon, and the body has holes 155 through which the lubricant may pass to the annular outlet formed between the upper end of body 140 and a surrounding tube 157. The chamber 33 is kept filled up to the level of an overflow, and any excess lubricant is returned to the reservoir A. This assures lubrication of the bearing 96 of the connecting rod 95 and the bearing 80 the shaft 82, return passages 176, 177 to the reservoir being provided for the latter. A spring-pressed plunger 163 is disposed above the valve H and carries a valve disc 168 at its lower end. Manual depression of the knob 172 causes the valve 168 to seat on the upper end of the tube 157 causing closure of the byepass. The reservoir has a filling cap C and a sight gauge G.