US1977831A

US1977831A - Lubricant dispensing apparatus

Info

Publication number: US1977831A
Application number: US706501A
Authority: US
Inventors: John M Marshall; Edwin C Thomas
Original assignee: Individual
Current assignee: Individual
Priority date: 1934-01-13
Filing date: 1934-01-13
Publication date: 1934-10-23
Anticipated expiration: 1951-10-23

Description

Patented Oct. 23,

"PATENT". OFFICE I LUBRICANT DISPENSING APPARATUS John M. Marshall and Edwin C. Thomas,

Pittsburgh, Pa.

Application January 13, 1934, Serial No. 706,501 9 Claims. (01. 221-471) Our invention relates to improvements in lubricant dispensing apparatus, and more particularly to heating means therefor.

Automatic lubricant dispensers of large capacity, such as, for example, those employed asstandard equipment in garages and automobile service stations, are generally operated either electrically or by means of compressed air.

Where it is necessary to operate the compressed season, considerable difliculty has been encoun-- tered due to the hardening of the lubricant in the cold temperature, and the freezing of the air-operated parts of the device, particularly at the exhaust outlet.

It is a prime object of this invention to provide a heating means for such lubricant dispensers for eifecting a ready and uniform flow of the lubricant, and to superheat the exhaust air to prevent ice formation and the resulting interruption of operation.

Additional objects are to provide a construction capable of ready application to and co-operation with present standard forms of air-operated lubricant dispensers; and to provide a construction having simplicity and low cost of manufacture.

Further objects will become apparent from the following description, taken in connection with the accompanying drawing, wherein;

Fig. 1 is a vertical sectional view of a lubricant dispensing apparatus embodying our invention;

Fig. 2 is a cross-sectional view taken on the broken line II-II of Fig. 1; r C

Fig. 3 is an elevational view of a portion of Fig. 1, showing a modified form of theinvention; and

Fig. .4 is a similar View of a further modification.

Referring to the drawing, A designates generally a lubricant dispensing apparatus of well known form,,for the highpressure dispensing of greases. Said device includes a grease tank or reservoir5 having abottom outlet Scommunieating with a working barrel 7 containing a reciprocable plunger 8. I

Plunger 8 is mounted for reciprocation by means of a piston 9 within a cylinder 10, constituting an air-actuated grease pump, receiving and exhausting compressed air through a port 11 of said cylinder in alternate communication with an air inlet port 12 and an outlet or discharge port 13, controlled by an automatically operable slide valve 14, as will be readily understood. Air under pressure is supplied from any. suitable source to the inlet port 12 by a pipe line 15.

In present practice, theplunger 8 expels a charge of grease from its barrel 7 and discharges said grease through a check valve 16 into an attached hose or conduit 1'? which may be connected by any suitable means (not shown) to the part air driven dispenser out-of-doors in the winter or parts being lubricated. Rapid and repeated strokes of the plunger 8 build up high pressures on the grease aga-nst the obstruction of the said receiving part or parts.

The air exhaust port 13 of the pump in present equipment is open directly to the atmosphere. In cold weather, the air operating the pump is discharged at a temperature below the freezing point.

Any moisture in the exhaust air will collect in the exhaust pipe and about the port 13 as frost,

. application of a single heating means in the following manner.

The lubricant dispenser Ais preferably enclosed within a heat insulating casing or cabinet 18 of any desired construction. For example, we have shown such a cabinet formed of wood with an exterior shell 19 of sheet metal and an interior lining 20 of asbestos, and including a removable cover 21. The connection for the hose 17 is extended outside of the cabinet 18 by means of a sleeve or nipple 22 threaded at its outer end to couple said hose and having threaded connection at its inner end with'the Working barrel '7 or its check valve 16.

In the design of the dispenser illustrated, the air exhaust of the pump takes place around a reduced end portion of the valve 14 extending within the exhaust port 13, which construction is enclosed within the cabinet 18 when applied. Means are provided in the form of a bonnet 23 for surrounding said port and introducing the exhaust air into a connected pipe or coil 24'. The

manner as by threads, screws, or the like.

Said pipe 24 is passed upwardly within the cabinet asubstantial distance and is looped or coiled at its upper portion as at 25, returning downwardly and thence outwardly of the cabinet at 26 for final external air exhaust. A clamp or bracket 27 may be employed for securing the por- 131011 25 of the pipe to a side wall of the cabinet,

. bonnet 23 may be secured in place in any suitable V nections 29 with an external source of current 30 through an intervening switch or wall box 31. In Figs. 1 and 2, we have shown such element 28 in the form of 'a ring or disk supported from the wall of the cabinet in close proximity to the exhaust pipe 24 by an insulator pin 32. f 7

Hence, during the operation of the apparatus in low temperatures, the heat from the element 28" will pervade the interior of the cabinet 18 to warm hose 17.

By reason of its close proximity to the exhaust pipe 24, or more specifically, the loop or coil 25 thereof, the element 28 will superheat the exhaust air passing therethrough', whereby said air will be I discharged at-26 into the atmosphere at a much higher temperature than heretofore, thereby doing away with the undesirable formation of ice ment 28 to control the same within certain desirable limits.

In Fig. 3, we have shown a modification em- .ijbodying means for heatingthe incoming air prior to" its introduction intothe pump. In this form, a-hollow cylindrical heating element 28wis employed in the same relation to the-portion of the exhaust pipe 24 as before, and having theair .risintakeline 15a coiled about its exterior.

increased temperature. 40 A still further modification is illustrated in gFigp4fwherein a'flatelongated electric heating element 28b is used, having the intake and ex haustpipes=15b and 24a disposed on either side of the element and extending longitudinally thereof, The element andadjacent pipe por-" gg tionsare venclosedwithin a metal case 34 filled with asbestos cement, whereby heat istransmit-- ted'to the airins'aid pipes 'for sup'erh'eatingthe' same, and heatis radiated from the case 34 of' ;,;net 18*as-before.

Further-changes and modifications are contemplated 1 withinthe I scope i of the following l i I w i M 3 What we claim is: v

1. In a lubricant dispensing apparatus, an air- 50 the entire assembly to heat the interior of cabiactuated lubricant pump having air inlet and ex haust ports, a heat insulating cabinet enclosing saidpump, an air exhaust pipe disposed 'within' 0 the cabinet having connection with the exhaustta-port and terminating outside said cabinetyand heating-means disposed within the cabinet for heatingthe exhaust air in said pipe, as and for-the purpose described. In-a lubricant dispensing apparatus, a lubrieant reservoir, an air-actuated lubricant pump therefor havingair inletand exhaust" ports, 'a

heat insulating cabinet enclosing said reservoir andpump, an' air exhaust pipe disposed within 7(:, the cabinet'having' connection with the exhaust g port and terminating outside saidcabinet; and" heating-means disposed within the" cabinet for heating-the-interior ofthe cabinet and the ex the grease contained in the tank"5,"as well as that in the working barrel 7, and maintain a .uniform flow thereof from the dispenser into the Such. construction further, aids in'superheating the air whereby it will be discharged at 26 atgreatly bricant holder therein, a lubricant ejector in disactuated motor having a supply and exhaust conbricant holdertherein, alubricant'ejector in dis-f heater 'withinthe"cabinet, and means subjecting haust air in said pipe, as and for the purpose described.

3. In a lubricantdispensing apparatus, an airactuated pump having inlet and exhaust ports,

a heat insulating cabinet enclosing said pump,

., .an air exhaustpipe having a substantial portion thereof disposed within the cabinet, said pipe having connection with the exhaust port and terminating outside said cabinet, an air inlet pipe disposed within tl'ie cabinet, and heating means in thecabinet positioned in close proximity to both of said pipes, for heating the incoming and exhaust air, asand for the purpose described.

4. Ida lubricant dispensing apparatus, a lubricant reservoir, an air-actuated lubricant pump therefor having air inlet, and. exhaust ports, a heat 1 insulating cabinet enclosing said reservoir and'pump, an air exhaust pipe having asubstan tial portion thereof disposed within the cabinet, said pipe having connection with the exhaust port and terminating outside said cabinet, an air inlet pipe disposed within the cabinet, and heating means disposed in. the cabinet in close proximityto both of said pipes, for heating the interior of the cabinet and the incoming and exhaust air in said pipes, as and for the purpose described.

5. In alubricant dispensing apparatus, an airactuated lubricant pump having air inlet and exhaust ports, a heat insulating cabinet enclosing said pump, a heating element disposed within the cabinet, and an air exhaust pipe connecting said exhaust port and having a portion there: of disposed 'withinthe cabinet in fixed relation to the heating element for heating the exhaust 11C air in saidpipe whereby saidair is discharged loutside the cabinet at a superheated temperature','a s' and for the purpose described.

6. In combination, anenclosing cabinet, a lupensing co'mmunication with the holder, an air actuated; motor havinga supply and exhaust conduit leading into and out from the holder, a heater within the cabinet, and means subjecting circulating motor airto heater action within the cabinet; I

'7.-"In combination, an enclosingcabinet, a lubricant'holdertl'i'erein; a" lubricant ejector in dispensing communication with the" holder, an air-' duit leading into andOut fromthe holder, a heater within thecabinet, andmeans subjecting incoming motor air to h eate'r'actio'ri within"th'e,

cabinet.

8:In combination, an enclosing cabinet a lupensing communication with the holder," an air-I actuated motor having asupply and exhaust"con+1 duit leadinginto' and out from the holder, a"

in the cabinet. 9. In combination, an enclosing cabinet, a luoutgoing motor exhaust air to heater actionwith- "bricant holdert herein, ajlubricant ejector in dispensing communication with the holder, an airactuated motor havingfasupply and exhaust conduit leading into 'a'ndput'ifrom the holder, a

heater within thecabinet, and means subjecting incoming motor supply air and outgoing mo-' tor exhaustair to heateraction within the cabi- 45 net. a

JOHN M. MARsfi ALL. Enwm o; THQMAS, I