USRE18425E

USRE18425E - hawxhurst

Info

Publication number: USRE18425E
Authority: US
Publication date: 1932-04-12

Description

p 1932- J. J. HAWXHURST Re. 18,425

LIQUID DELIVERY APPARATUS I Original Filed March 29, 1927 2 Sheets-Sheet 2 BY MXWLM.

- are attain features of construction, combinatlon and ar- Rei'uued .Apr. 12, 1932 UNITED STATES PATENT OFFICE.

JOHN J. HAWXHURST, OF BROOKLYN, NEW YORK, ASSIGNOR, BY DIRECT AND MESNE ASIGNMEN'1S, T0 LIQUID DISPENSING SYSTEMS, INC., 0]! BROOKLYN, NEW YORK,

A CORPORATION OF NEW YORK LIQUID-DELIVERY .errann'rus Original 170. 1,742,208, dated January 7, 1930, Serial No. 179,834, filed March 29, 1927. Application for reissue filed January 7, 1932. Serial No. 586,155.

This invention relates particularly, though not exclusively, to the handling of gasoline and liquids of a similar hazardous nature.

.Special objects of the invention are to keep the hose or final delivery connection dry or empty in the non-delivery condition of the apparatus and to take the pressure ofi' the delivery line leading up to the hose, when the apparatus is not in use. Collateral objects are to provide simple means, conveniently accessible at the delivery nozzle of the hose for simultaneously'admitting pressure to the line and for discharging the liquid in continuously metered supply from the hose.

The fore oin and other desirable objects in tiis invention by certain novel rangement of parts as hereinafter defined and claimed.

The drawings accompanying and forming part of the specification illustrate the invention embodied in one simple, practical commercial form, but it is to be understood that the structure may be modified as regards this disclosure without departure from the true spirit and broad scope of the invention.

Figure 1 is a side elevation of the complete apparatus with the delivery stands and other portions of the installation indicated in broken lines.

Figure 2 is an enlarged broken and part sectional view illustrating particularly the controls and connections.

in tanks 3 and taken from there by piping 4 and pum 5, which latter discharges by pipe 6 into a elivery or pressure tank 7.

From delivery tank 7 the liquid flows through piping 8 and branches 9 to one or more dellvery stands having meters 10 and dischar e hoses 11.

The elivery at each stand is controlled by a valve 12 interposed in the feed line and actuated by amagnet 13. This magnet in each case is under control of a push button 14 located on the hose approximately three feet back of the mouth of the nozzle and connected with the magnet by a suitable control cable extending back along the hose.

' The delivery line 8 leading to the stands is governed by a control valve 15 actuated by transformer 19 which'steps the voltage down for the control circuit 20.

In the present illustration, the push button 14 on the hose closes three contacts at 21, 22, 23 at the outer terminus of the cable 43, this cable having at its inner end a plug 24 carrying blades or prongs 21, 22', 23 coacting with terminal contacts 21 322", 23'. The first of these contacts is shown connected by wire 25 with the delivery magnet 13 which has a wire 26 connecting with the branch 27 of one side of the control circuit 20. From the other side of said control circuit abranch 28 and wiring 29 connect with contact 22*. The third terminal, 23", is connected by wiring 30, 31, with a lead 32 extending to the pressure control valve magnet 16, said magnet havin a return connection 33 with the other side 0 the control circuit.

The general structure of the magnet valves is illustrated at the left in Figure 2, being shown as a valve head 34 on a stem 35 to which there is connected a solenoid core 36 operating in the solenoid magnet. This valve is indicated as normally held closed by springs 37 pulling down on the core and valve stem to force the valve to its seat.

The plug terminals are all shown housed in a suitable terminal box 38. The control connections at any hose may be interrupted by simply pulling out the plug 24. Thus the control may be readily cut out whenever desired and the same will be automatically interrupted if the hose should be accidentally torn away from the stand.

A suitable screen for the meter is indicated at 39. A manually operable shut-ofi valve may be provided at each stand as indicated at 40. The pump 5 is shown as automatically controlled by a pressure actuated switch 41 connected by piping 42 with the pressure tank 7.

The automatic switch 41 is set to cause the pump 5 to transfer liquid from the storage tanks into .the pressure tank 7 until the air trapped in said tank above the liquid therein reaches a redetermined pressure, which pres-' delivered through line 8 and branches 9 to the various delivery stands. To deliver any desired quantity of liquid, therefore, it is only necessary to press the hose button 14 and to open the nozzle valve 44. The push-button simultaneously closes circuits through both the delivery magnet valve 12 and pressure magnet valve 15, opening said valves and permitting the liquid under pressure to flow from the hose under control of the nozzle valve 44. This liquid is metered as it flows throu h the hose to the nozzle and as much as may e required may be delivered continuously, withoutinterruption,at any time. Whent epushbutton is released, the tank supply valve and the delivery valve both snap closed. This permitsthe hose to drain free of any liquid and at the same time pressure is taken off the delivery line 8. The latter feature is particularly important because the delivery line is relieved of pressure when not in actual use and any injury to this line, therefore, can only result in loss of the liquid in the line. Thus the delivery tank will not empty itself if there should be a break in the deliver line. At the same time it will be observe that there is no loss in speed of delivery because the liquid in the delivery line beyond the valve 15 is trapped in the line and so becomes immediately available for the next delivery operation. 0 I

The main valve is usually underground where it is safely protected from in} ury. The

use of the two valves in tandem prevents any hammer or back surge which might have a tendency to impart an impulse to the meter when the flow is cut ofi.

The tank 7 which serves as a receiving chamber for separating air or gas from the liquid and for carrying the liquid under pressure in delivery, a so serves as a cushioning means for overcoming hammer tendencies. This chamber may vary in size and location, such as to meet particular requirements. The combination disclosed, whether in the precise relation illustrated or modified within the scope of the invention, serves to automatically maintain a substantially constant operating pressure in the system at all times, so as to maintain the meter or measuring device accurate in its operation. The separable plug 24 constitutes one simple means for automatically preventing flow of liquid in case of any abnormal strain or pull on the hose, but same is to be understood as constituting merely one preferred method of accomplishing this novel safetv feature.

isms

To prevent an accumulation of pressure within tank 7, which might become injurious or dangerous, an automatic pressure relie valve is indicated at 45 controlling a line 46 extending back to the nearest storage tank 3.

This automatic pressure relief device communicates with the contents of the tank or chamber 7 by connection 47 extending to be-- low the normal or desired liquid level therein, so that under conditions of excessive pressure, it will simply return liquid back to the storage tank. This excess pressure control means therefore, does not interfere with the maintenance of the desired air cushion and liquid level in the delivery tank or chamber 7 as covered in Hawxhurst Patent 1,680,457 of August 14, 1928 (filed February 23, 1927), said feature being claimed in the present case in its particular relation to the other features of novelty herein.

I claim:

1. In liquid delivery apparatus, the combination with a delivery stand, a pressure tank and a delivery line extending from said tank to said delivery stand, of a delivery valve in said line at the delivery stand, a positively closing supply valve in said line adjacent the pressure tank and means for substantially simultaneously openin and closing both said delivery valve and said positively closing supply valve.

2. A combination as in claim 1 in which said means are controllable at the delivery stand and in which means are provided for maintaining continuously a ho y of liquid under pressure in the pressure tank.

3. In combination, a storage tank, a pressure tank, a pump for transferring liquid from the storage tank to said pressure tank, a pressure actuated control for said pump, a pressure control connection extending from said pressure control back to the pressure tank, a liquid delivery line extending from the pressure tank, a valve controlling flow of liquid from the pressure tank into said delivery line, a valve for controlling discharge of liquid from said delivery line and means for actuating said valves substantially in 111118011.

4. In liquid delivery apparatus, the combination of a liquid supply line and liquid delivery branches extending therefrom, valves controlling the individual branches, a valve controlling the supply line and means for automatically effecting the operation of said supply valve upon the operation of any selected one of the delivery valves, said means including electromagnets by which the valves are actuated and electrical connections ex tending from the respective delivery valves back to said supply valve. 4

5. In liquid dispensing apparatus, the combination of a tank for holding a supply of liquid and a liquid delivery line extending from said tank an terminating in a dis trolling liquid charge hose, a sitively closing valve con- 53w from the tank into said delivery line, a valve in the delivery-line adjacent the discharge hose for controlhng flow from the delivery line through the hose,

a flow -meter connected in the delivery line adjacent the. hose for continuously register mon control at the discharge end ofth'e hose and back along said hose.

6. In liquid dispensing apparatus, a liquld supply tank, a delivery line extending theretively closing valves in said liquid delivery from and terminating in a liquid discharge connection, an electrical governing device adjacent the discharge connection for controlling flow from the delivery line into said discharge connection, an electrically. governed device adjacent the supply tank for controlling liquid flow into the delive line and electrical means operable at the disc ar e connection to positively efiect substantial y simultaneous operation of both said electrical devices to thereby substantially simultaneously start and stop flow in the liquid delivery line at two points, one adjacent the discharge CODIIKIBCtlOII and the other adjacent the supply tan 7. In liquid dispensing ap aratus, the combination of a tank for holdin liquid and a liquid delivery line extending fromsaid tank and including at the delivery end a flexible liquid discharge hose, posiline controlling flow fromv the tank into the liquid delivery line andthe delivery of liquid through the dischar e, hose, a flow meter in the delivery line ad acent the hose for continuously registering liquid discharged through the hose and a common control for both the valves aforesaid including a flexible transmission connection carried by and coextensive with the hose and flexible therewith. v

8. In liquid dispensing apparatus, the combination of a liquid delivery line including at the discharge end a flexible liquid delivery hose, means for governing the flow of liquid in said delivery line, and control mechanism for said liquid flow governing means including a flexible transmission connection coextensive with and carried by the hose and means 0 erable in conjunction therewith to automatlcally interrupt operation of said liquid flow governing means by abnormal strain on the flexible hose. I

9. In liquid dispensing apparatus, the com bination of liquid delivery means including a liquid and air containing chamber and a discharge hose provided with a nozzle valve, liquid flow controlling means associated with 'sald delivery means, a liquid measuring ply thereof, of the a supply ofsaid delivery means, a liquid measuring device operatively related with said liqui livery means, and means connected with'the hose for governing the operation of said liquid flow control means.

' 10. In liquid dispensing apparatus, the

combination of li uid delivery means includ iqg a liquid and air containing chamber and a 1 scharge hose provided with a nozzle valve,

liquid flow controlling means associated with evice-operatively related with said liqui livery means, and means carried by the hose and operable'at a position adjacent the nozzle valve for governing the operation. of the liquid flow controlling means.

11. In liquid dispensing apparatus, the

combination with a pressure tank or chamber adapted to receive liquid from a suitable supollowing instrumentalities, means for transferring or supplying liquid to said chamber and for creating pressure therein, a delivery line connected with said chamber, a dispensing hose or member connected with said delivery line, means for controlling flow of liquid from said chamber to said dispensing member, a measuring unit adapted to measure the liquid dispensed, means to control the discharge of liqu1d from said dispensing member, said instrumentalities being organized to maintain the liquid.

contained in said apparatus under substantially constant pressure.

12. In liquid dispensing ap aratus, the combination with a pressure tan or chamber adapted to receive liquid from a suitable supply thereof, of the following instrumentalities, means for transferring or supplying liquid to said chamber and for creating pressure theiein, a delivery line connected with said chamber, a dispensing hose or member connected with said deliver line, means for controlling flow of liquid rom said'chamber to said dispensing member, a measuring unit adapted to measure the liquid dispensed, means to control the discharge of liquid from said dispensing member, said instrumentalities being organized to maintain the liquid contained in said apparatus under substantially constant pressure at all times and thereby avoid any tendency to impart an impulse to said measuring device when the discharge of liquid is suspended.

13. In liquid dispensing apparatus, the combination with a pressure tank or chamber adapted to receive liquid from a suitable sup ply thereof, of the following instrumentalities, means for transferring or supplying liquid to said chamber and for creating pressure therein, a delivery line connected with said chamber, a dispensing hose or member connected with said delivery line, means for controlling flow of liquid from said chamber to said dispensing member, a measuring unit adapted to measure the liquid dispensed,

means to control the discharge of liquid from said dispensing member, said instrlinientalities being organized to maintain the liquid contained in said apparatus under substantially constant pressure, said means acting to maintain a supply of liquid trapped in said apparatus rea y or delivery.

14. In liquid dispensing a paratus, a pres-- sure chamber to receive liqui to be dispensed, means for transferring liquid to said chamber and to create therein a pressure suitable for dispensing said liquid, means to measure the flow of liquid dispensed, and means acting automatically to control the operation of said liquid-transferring and pressure creating means and tending to maintain constant pressure in said apparatus at all times.

15. In liquid dispensing apparatus, the combination of a liquid delivery lineincluding at the discharge end a flexible delivery hose, means for governing the flow of liquid in said delivery line, and control mechanism for said liquid-flow-governing means including means operable automatically by abnorr mal strain on the flexible hose to interrupt flow of liquid to said hose In testimony whereof, I aifix my si ature.

JOHN J. HAWX ST.