Patent GB-1083702-A (GB)
Title: Airline lubricator
Inventor: RISKE GILBERT
IPC: F16N7/34
Filed: 1964-08-27
Abstract: 1,083,702. Lubricators. PARKER-HANNIFIN CORPORATION. Aug. 27, 1964, No. 35182/64. Heading F2A. An airline lubricator has a housing 8 with an air-passage 9 therethrough which has a restriction intermediate its inlet and outlet ends 10, 11 so that, when air flows through the passage 9, a pressure drop is established across the restriction. A passage 41 in the housing communicates with the outlet end 11 through a valve unit 23 which opens when the pressure-drop across the restriction reaches or exceeds a predetermined value and admits pressurized lubricant to the outlet end 11 via the passage 41. In an embodiment, the lubricator 5, Fig. 1 (not shown), comprises an air supply structure 6 having the housing 8, and an attachment 7 having a body 13 with a flange 14 which is clamped by rings 16, 17 to the housing 8. A chamber 12 is formed in the housing 8 and is closed by the body 13 and a seal 15 is provided between the housing 8 and the body 13. A cap 18 is mounted on the housing 8 and has a vertical bore 22 therethrough which is aligned with a vertical bore 21 in the housing 8. Sealing rings 19, 20 are provided between the cap 18 and the housing 8 and a valve unit 23, having a body 24, is mounted in the bores 21, 22. The body is clamped within the housing 8 by a combined clamp and seal assembly 27; has a valve portion 28, Fig. 3 (not shown), located within the air passage 9 for controlling the flow of air therethrough so that there is a difference in pressure at the inlet 10 and outlet 11; and has a bore 29 therethrough which terminates at the lower end thereof in an enlarged bore 30. The latter receiving an upper end of a lubricant supply tube 31 which is retained by an 0-ring 32. A ball-valve 33 is provided to prevent the return of lubricant through the tube 31. The upper part of the body 24 has an enlarged bore 35 which receives an internallythreaded bushing 36 having a needle-valve 37 screwed therein which co-operates with an upper portion 37<SP>1</SP> of the bore 29 to control the volume of lubricant passing therethrough. The chamber 12 is supplied by air from the inlet end of the passage 9 via a passage 40. The housing 8 has the passage 41 therein which leads from the outlet end of the passage 9 to a chamber 42 in the cap 18; the chamber 42 being in communication with the bore 29 of the body 24 and with the tube 31, via passages 43 so that the lubricant is supplied to the air leaving the outlet 11. The pressure in the tube 31 corresponds to the pressure of the air at the outlet 11, thus there is a difference between the pressure in the chamber 12 and the pressure within the tube 31. The body 13 has a transverse bore 44 therein which receives a removable plug 45 and which is stepped at 47. A diaphragm 48 is clamped to the step 47 by the plug 45 being urged against a ring 49 to form a chamber 46 which connects, via a passage 56, the tube 31, the bore 29 and passages 43, to the chamber 42. The plug 45 has a chamber 50 therein which is effectively in opposition to the chamber 46 and which connects, via passages 53, 54 therein and a passage 52 in the body 13, with the chamber 12. Thus the air-pressure in the chambers 42, 46 are the same also the airpressure in the chambers 12, 50 are the same but are higher than the pressures in the chambers 42, 46. The flow of the lubricant is regulated by an adjustable screw-plug 71 which is received by a bore 69 in the plug 45 and which adjusts the diaphragm 48 via a spring 75. The diaphragm 48 is clamped by a washer 66 to a plunger 65 which engages a plunger 63 of a valve 62. Thus the flow of lubricant from an inlet 58 and a passage 61 is regulated and passed through the passage 56 and tube 31 &c. to the air-outlet passage 11. A filter 60 is provided in the inlet 58. In operation, by adjusting the valve-portion 28 of the body 24 in the air passage 9, the differential pressure at each side of the diaphragm is effected and the oil supply is adjusted by the valve 62 in relation to the amount of air flowing through the passage 9.