US2620896A

US2620896A - Centralized oiling system

Info

Publication number: US2620896A
Authority: US
Inventors: Ernest W Davis
Original assignee: Gits Bros Mfg Co
Current assignee: Gits Bros Mfg Co
Priority date: 1949-10-20
Filing date: 1949-10-20
Publication date: 1952-12-09
Anticipated expiration: 1969-12-09

Description

Dec. 9, 1952 E- w. DAVIS 2,620,896

CENTRALIZED OILING SYSTEM Filed Oct. 20. 1949 Hill IN V EN TOR.

w/A. 6M;

Patented Dec. 9, 1952 GENERALIZED OILING SYSTEM ErnestW. Davis, Oak Park;Ill., assignor to Gits Bros; Mfg.- Got, Chicago, 111., a crpora-tion-- of .Illinois Application 0ctohen20, 1949, Serial No..122,543.

' 4 Claims. 1 My invention relates to centralized oiling systems, and its general object istoprovide an emcient oiling system that can be manufactured at low cost. A more specific objectis to-devise a centralized oiling system having an-oil line containing measuring valves, and provided with-a centralized pumping unit having an improved timing mechanism for alternately applying a predetermined pressure to the oil line and then releasingsaid press-ureat predetermined time intervals.

An embodiment ofmy invention is illustrated in the accompanyingdrawing, in which the cen-' tral pumping'unit 2 is shown in sectional elevation. The oil reservoir 4, is-provided with a cover 6-. The piston- 8- of the pumpdreciprocates vertically within the cylinder portion lfl when the cam i2 isrotated by theelectric motor l4v The cam I 2 moves the piston 8 downwardly by engagement with the cam wiperi6, and the spring-1 8: moves the piston 8 upwardly by engagement with the collar 20 When the piston-8 occupies its highest position, it uncovers the port 22; so that oil. from: the reservoir 4 may flow into the cylinder Hl. Then when the piston 8 is moved downwardly, it first coversthe port 22', and. th'en 'forc'es oil from thecylinder I'll, pastthe check; valve '24,. through the discharge port 26 and into the oil line 28. The oil line 2B deliv ers oil under: pressure to: a plurality of measuring valves 30132, and .34, for supplying measured quantitiesof' oil to the bearings 36,. 3-8, and 40, respectively, of the machine tobe" lubricated. Thesemeasuring valves are" of a type that passes a measured quantity of oil at each application of oil; pressure in the oil line, succeeding a release of; the pressure therein. Measuring: valves of this character-are well kncwnto those skilled in the lubricating art, and therefore'further description seems unnecessary.

The riser tube 42 connects with the discharge port 26, and is provided at its upper end with a closefitting plunger 44, whichiis vertically movable between its uppermost position, as shownby full lines, and its lowermost position,. as shown by dotted lines. The plunger 44, while occupying its lowest position, closes the opening-=46, thereby: providing a lay-pass valve, which forms an important, element in the invention,- and which is identified in general by the numeral 48. The upper end of the plunger 44 is provided with a head 47, which limits downward movement of the plunger 44 by engagement with the upper end of the riser tube 42. When the by-pass valve 48 is open, it allows oil to flow from the riser tube 42, through the by-pass conduit 50, and

into the tilting, bucket 52'. The tilting; bucket 52 is pivoted on thehorizontal shaftx54, which is supported by the reservoir 4".

The tilting bucket 52 is free to. oscillate betweenthe upper position, as shown by full lines, and the lower position, as shown by dotted lines, and is so constructed and arranged that it will remain in the upper position when it is empty,-

arid will be moved by gravity to the lower position when a sufiicient quantity of oil flows therein from the by-pass conduit50'. It will be observed that when the tilting' bucket 52' moves from the upper. position to the lower position, the connecting structure 56- then urges the plunger 44 downwardly" so as to close thebypass valve 48. It will also be observed that-when the tilting bucket 52' occupies its lower position, sufilcient pressure in the riser tube 42"will-cause the plunger 44 to move upwardly, thereby restoringthe tilting bucket 52 to its upper position. By means of this co-acti'on, the tilting bucket 52 actuates the by-pass valve 48, and the 'bypass valve48' actuates the tilting bucket 52. The reciprocal effect thus attained is utilizedwith particular advantage in carrying out the objects of the invention, as'will appear hereinafter".

Operation 'The electric motor 14 is shunted across the motor thatoperates the machine to be lubricated, so? that the motor |4.wil1' drive the pump 9-wh'eneverthe machine is running. and at no other time. Operation of: the pump! builds up oil pressure in the oil'line 28,. and thereby causes eachof'the measuring. valves 30', 32, and 34',t0 discharge a measured quantity of oil. During this operation of the measuring. valves, the tilting bucket 52-will occupy its lower; position, as shown-by the dotted lines, and the by-pass valve 48. will :be held closed. Whenthe tilting bucket 52' is moved to its lower position, the oil com tained; therein will flow out by gravity; and-:will return to, the oil in the reservoir 4 to be pumpe over again.

After all the measuring valves have operated, the continuedoperation of the pump it willincrease the oil pressure in the riser tube 42 until it is sufiicientto move the plunger 44 upwardly, thereby-returning the tiltingbucket 52' to its upperposition; and thereby opening the by-pass valve 48. This releases the pressure in the oil line 28, so that the

measuring valves

30, 32, and 34 may restore to normal loading position in the manner well known to those skilled in the art. Opening of the by-pass valve 48 also allows oil discharged by the pump 9 to flow through the bypass conduit 50 and discharge into the tilting bucket 52. After suificient oil has discharged into the tilting bucket 52, the center of gravity of the bucket (including the oil therein) will be shifted to a position at the right of the shaft 54, whereupon the tilting bucket 52 will swing down to its lower position, and the by-pass valve 48 will be closed by this action, thereby completing the cycle of operation.

In order to secure uniform and satisfactory operation, it is desirable that the oil level in the reservoir 4 shall be no higher than the lowermost portion of the tilting bucket 52 while in its lower position. In the preferred embodiment of this invention, the capacity of the tilting bucket 52 is substantially greater than the combined discharge capacities of all the measuring valves in the oil line 28. It is to be understood that in the particular embodiment of this invention, as herein shown and described, certain departures from commercial design have been purposely employed in order to make the drawings more understandable. Many modifications and improvements in this construction could be made by those skilled in the art without departing from the spirit of the invention.

I claim:

1. In a centralized oiling system having an oil reservoir for supplying oil to a power-driven pump arranged to discharge said oil under pressure into an oil line to which is connected a plurality of measuring valves; a by-pass valve for by-passing oil from said oil line, said bypass valve being movable to an open position and a closed position, and said by-pass valve including a cylinder portion connected with said oil line, and a plunger portion exposed to said oil pressure and reciprocable in said cylinder portion, and said by-pass valve having a port therein, and said plunger portion bein movable to positions that open and close said port; and an unbalanced tilting bucket oscillatable about a substantially horizontal axis to an upper position and a lower position, said tilting bucket being shaped to retain a substantial quantity of oil while occupying said upper position and to discharge said oil when moved to said lower position; and a by-pass conduit for conducting said by-passed oil from said by-pass valve to said tilting bucket, said tilting bucket being moved to said lower position by the force of gravity acting on the combined mass of said tilting bucket and said by-passed oil contained therein, and said tilting bucket being operatively connected with said plunger portion, and said plunger portion being moved to a position covering said port when said tilting bucket is moved to said lower position, and said plunger being moved to a position that uncovers said port when the oil pressure in said oil line reaches a predetermined value, and said tilting bucket bein moved to said upper position by said uncovering movement of said plunger.

2. In a centralized oiling system having an oil reservoir for Supplying oil to a power-driven pump arranged to discharge said oil under pressure into an oil line to which is connected a plurality of measuring valves; a pressure-opened by-pass valve connected with said oil line for releasing the oil pressure therein when said pressure reaches a predetermined value; oil actuated timing mechanism receiving oil discharged through said by-pass valve, said timing mechanism being movable from a first position to a second position and movable from said second position back to said first position, and said timing mechanism being moved from said first position to said second position in response to the delivery thereto of a predetermined amount of oil from said by-pass valve; and connecting structure between said by-pass valve and said timing mechanism, said connecting structure transmitting motion from said by-pass valve to said timing mechanism in a direction to move said timing mechanism to said first postion when said by-pass valve is opened, and said connecting structure transmitting motion from said timing mechanism to said by-pass valve in a direction that closes said by-pass valve when said timing mechanism is moved to said second position.

3. In a centralized oiling system having an oil reservoir for supplying oil to a power-driven pump arranged to discharge said oil under pressure into an oil line to which is connected a plurality of measuring valves; a pressure-opened by-pass valve connected with said oil line and responsive to the oil pressure therein for releasing oil from said oil line when the pressure therein reaches a predetermined value; and gravity-actuated timing mechanism receiving oil discharged through said by-pass valve and responsive to the accumulation of a predetermined weight of said received oil for closing said bypass valve.

4. In a centralized oiling system having an oil reservoir for supplying oil to a power-driven 3 pump arranged to discharge said oil under pressure into an oil line to which is connected a plurality of measuring valves; a pressure-opened by-pass valve connected with said oil line and responsive to a predetermined pressure therein for releasing oil from said oil line; gravityactuated timing mechanism receiving oil discharged through said by-pass valve and responsive to the accumulation of a predetermined weight of said received oil for closing said bypass valve; and leverage structure between said by-pass valve and said timing mechanism for transmitting motion from said timing mechanism to said by-pass valve and for transmitting motion from said by-pass valve to said timing mechanism, said leverage structure providing a lever of the second class during first motion transmission, and said leverage structure pro viding a lever of the third class during said second transmission.

ERNEST W. DAVIS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,959,060 Norelius May 15, 1934 2,219,681 Davis Oct. 29, 1940