USRE13325E

USRE13325E - Liquid packing for pumps

Info

Publication number: USRE13325E
Authority: US
Inventors: John V. O. Palm
Original assignee: The Palm Vacuum Cleajteb
Publication date: 1911-11-28

Description

J. V. O. PALM.

LIQUID PACKING FOR PUMPS.

APPLIGATION FILED DEO.10, 1909.

Reissued N011. 28, 1911.

and thereby reducing to a minimum the UNITED sTAras PATENT OF IC JOHN V. O. PALM, 013 DETROIT, MICHIGAN, ASSIGNOR TO THE PALM VACUUM CLEANER COMPANY, OF DETROIT, MICHIGAN, A CORPORATION OFMICHIGAN.

LIQUID PACKING FOR PUMPS.

13,325. Original No. 912,321, dated February 10, 1909. .Serial No. 532,508.

To all whom it may concern:

Be it known. that I, JOHN V. O. PALM,

consin, have invented certain new and useful Improvements in Liquid Packing for Pumps, of which the following is a description, reference being had to the accompanying drawings, which are a part of this specification.

This invention relates to pumps and has for its object to provide a flowing liquid packing for a reciprocatory piston pump friction between the piston and its cylinder and avoid detrimental action on the work- "ing parts of dust or the like contained in the material being pumped.

The invent-ion is particularly designed for use with suction cleaning systems where a low degree of suction is required and where the presence ofdust in the air being pumped constitutes a serious obstacle to the use of tight fitting piston's because of the erosive action of 'he dust on the working surfaces.-

The flowing liquid packing provided by this invention is sufficiently effective vto permit of the low degree of suction being attained, and serves to avoid the necessity for a tight fitting relation between the piston and its cylinder, while carrying off any particles of dust that may come in contact therewith. v

\Vith the above and other objects in view, the invention consists in thepump herein claimed, and all equivalents.

- The figure of the accompanying drawing represents a sectional elevation of a pump constructed in accordance with this invention, with parts arranged in the same plane for convenience of illustration.

In this drawing, 1 represents a base to which is removably secured a, cylinder 2 ,having' a piston 3. loosely mounted therein with a slight clearance on all sides, the piston rod working in a stationary guide 4 i to prevent its contacting with the walls of valved inlet pi e 6 ends. valved, outlet pipe,

the cylinder. An airpassage 5 in the. base opens to the interior of the cylinder at theaxis thereof and communicates with .a

7, the former esirably connecting with:

I suction nozzle of a cleaning system and the latter connecting with a discharge pipe 8 leading to a sewer or other place of disposal.

A water pipe, from the city mains or other source ol supply under pressure, connects with an annular space10 formed in the walls of the-cylinder 2 at about-midway the length thereof, and the water thus delivered to the cylinder is of a suflicient quantity and under such a pressure that it will force its way upwardly as well as downwardly in the slight clearance space allowed between the piston and its cylinder and constitutes a film-like packing for the piston. The water which passes downwardly is collected in an annular chamber 11 formed. in the base and communicating through a passage 12. with a valved outlet pipe 13 leading to the discharge pipe 8, before referred to. The water which passes upwardly from the annular space 10 is defiected'by the outwardly turned rim 1-1 of the piston and is collected in a trough 15 formed aboutthe upper end of the cylinder from which it is conducted through a pipe 16 to the discharge pipe 8.

The base 1 has a conical lies beneath the piston with its inclined surface rising from the circular groove or recess which forms the annular chamber 11 and having the air passage 5 opening at its apex. The conical portion 17 serves to shed water which may .be splashed thereon into the surrounding chamber ll and the shape of the piston end which corresponds therewith serves to orm a drip flange to prevent the water running toward the center'where it mi ht fall into the air passage 5, it being an 0% portion 17 which jectto avoid the admission, of water to the air passage where it might Specification of Reissued Letters Patent. Reissued NOV. 28, 1911. 16. 1909, Serial No. 385,581. Application for reissue filed December the water that would permit it to reach-the air passage 5.

In operation, the piston?) is reci rocated I preferably at a comparatively big and the water under pressure is admitte through the water pipe 9 toform the pack- 2 thatthe piston w ll cause an to, be-drawn between the piston and its'cylinder so speedi'" 95 The lower end of the cylinin through the valved inlet pipe 6 and to beforced out through the valved outlet pipe 7, the valves of these parts in practice being' preferably located as close to the piston as possible to reduce the dead air space. Dur- "ing the upward stroke of the plunger the downward flow of water will be somewhat increased, owing to the suction created in the cylinder and to. the reduced resistance to the flow of water in that direction, conseuently provision is made in taking care of the streams of water at both ends of the cylinder to avoid undue splashing, the formation of the annular chamber 11 being such as to deflect thestream outwardly and prevent its splashing into the air passage and the formation of the downwardly curved rim 14 of the piston being such as to deflect the water downwardly into the trough 15 and avoid its being splashed outside th reof.

During the water in the passage 12 is prevented from being drawn back into the cylinder by the check valve in the outlet pipe 13, and the speed of the piston is such that there is not suflicient time. during the suction stroke for water to back up behind this check valve to a degree that would enable -it to reach the air passage 5. v 7

By means of this invention, an air pump is provided which not only is relieved from retarding friction of a tight working piston, but which isalso free fromthe scratch- .ing and clogging effect of dust in the air being pumpe and the usual strainers between the pump and the suction nozzle may therefore be dispensed with and their objectionable features eliminated. By removing the dust laden air and water together they become thoroughly I taken" from the air so that when conveyed to a sewer or the like there is no objectionable discharge of dust.

What I claim is:

1 A reciprocating piston pump having a clearance space between the piston and its cylinder and meansfor introducing a con I inlet and outlet ports,

stant flow of liquid into the clearance to form a packing for the piston.

2. A reciprocating 'piston'pump having an unconfined clearance space. between the piston and its cylinder and means for supplying a constantflow of liquid to said clearance space and for collecting it therefrom.

3. A pump, comprising a cylinder having a piston loosely mounted in the cylinder with a clearance space therebetween, means for supplying the clearance space with flowing liquid at an intermediate part of the cylinder, and means for collecting the ends of the cylinder.

4. A pump, comprising a valved vertical cylinder, a piston loosely mounted therein,

space 'means for causing liquid under pressure to the suction stroke of the piston.

mixed and the dust is the air passage,

discharged liquid at bothliquid to the jthe cylinder,

flow through the space between the piston and the cylinder and constitute a flowing packing, adeflecting flange at the upper end of the piston, and a receiver for collecting the liquid deflected thereby.

5. A pump, conprising a valved vertical cylinder, 2. piston loosely mounted therein, means for supplying liquid under pressure to flow through the space between the piston and the cylinder and constitute a flowing packing, a deflecting flange at the upper end of the the cylinder forming a trough to receive the liquid deflected by the deflecting flange, and a conductor for discharging the water from the trough.

6. A pump, comprising a valved vertical cylinder, a piston loosely mounted therein,

piston, a flange on the upper-endof i means for delivering liquid under pressure liquid, and'valve-controlled means for conveying the liquid therefrom.

' 7. pump, comprising a vertical cylinder, a piston loosely mounted therein with a space therebetween, means for admitting liquid to the space between the piston and the cylinder to form a packing, a chamber at the lower end of the cylinder to collect the liquid, and means for discharging liquid from the upper end of the cylinder and from the chamber.

8. A-pump, comprising a vertical cylinder, a piston loosely mounted therein, means for admitting piston and the cylinder to form a piston packing, a base closing the end of the cylinder and having a valved air passage opening to the cylinder, a collecting chamher in the base surrounding the mouth of and valved means for conducting the ,liquid from the collecting chamber. 9. A pumpycomprising a cylinder, a piston loosely mounted therein with a space therebetween, means for introducing flowing liquid tothe'space between the piston and thecy'linder, a base closing the end of the cylinder and having a valved air passage opening to the interior (at-the cylinder, a conical guard on the base surrounding the mouth of the air passage to shed liquid therefrom, a collecting chamber surrounding the conical guard, and a valvedcohducting means through which the.li'quid may be discharged from the collecting chamber.

10. A pump, comprising a cylinder, a piston loosely mounted therein with a space therebetween, means for introducing flowing space between the piston and a base closing the end of the cylinder and having an air passage opening to the interior of the cylinder, a conical flowing liquid between the guard on the base surrounding the mouth of the air passage to shed liquid therefrom, a

collecting chamber surrounding the conical guard, a valved conducting means through which the liquid may be dischar ed from the collecting chamber, and a drip ange on the lower end of the piston.

11. A pump, comprising a cylinder, a piston loosely mounted therein with a space therebetween, means for introducing flowing liquid to the space between the piston and the cylinder, a base closing the end of the cylinder and having an air passage opening to the interior of the cylinder, a conical guard on the base surrounding the mouth of the air passage to shed the liquid, therefrom, a collecting chamber surrounding the conical guard, a valved conducting means through which the li uid may be discharged from the collectin c amber, and a depending flange on the ower end of the cylinder to prevent the liquid splashing into the mouth of the air passage.

12. A pump, comprising a cylinder, a piston loosely mounted therein with a s ace therebetween, means for introducing owing liquid to the space between the piston and the cylinder, a base closing the end of the cylinder and having an air passage opening to the interior of the cylinder, a conical guard on the base surrounding the mouth of the air passage to shed liquid therefrom, a collecting chamber surrounding the conical uard, a valved conducting means through which the liquid may be discharged from the collecting chamber, a drip flange on the lower end of the piston, and a depending flange on the lower end of the cylinder to prevent the liquid splashing into the month'- of the air passage.

13. A pump, comprising a vertical cylinder, a piston loosely mounted therein with a space thercbetween, an annular space formed in the walls of the cylinder at an intermediate part thereof, means for :\d mitting liquid to the 2llllllll2ll 51.;lt't. to coin stitute a. flowing liquid packing tor the piston, and means for discharging the liquid at the ends of tliecylinder.

14. A pump, comprising a cylinder, at P15 ton loosely mounted in the cylinder with a spare thert-lit-twet-n. m ans for admitting flowing liquid to the space lIt'lWttll the piston and the t-ylintlt-r, means for collecting the liquid at; the ends ol the cylinder, and a guide for the piston to prevent its engagement with the walls of the cylinder.

15. A pump, comprising a cylinder, a piston loosely mounted therein with a space therebetween, means for admitting flowing liquid to the space between the piston and the cylinder to constitute a packing, the cylinder being provided with valved inlet and outlet ports, and means for collecting the liquid from the ends of the cylinder into which the outlet port discharges.

16. In an apparatus for handling dust laden air, the combination of adjacent members having a clearance space therebe veen, an air connection communicating with one of said members, means for flowing a liquid between said members to form a seal for the air for flushing the surfaces exposed to the dust with the liquid from said seal and for discharging the liquid with thedust laden air to cleanse the latter.

17. In an apparatus for handling dust laden air, an air chamber formed by relatively movable inclosing members having a clearance space therebetween, 'means for introducing a liquid into the clearance space between said members to form a seal and for flushing the inner surface of said chamber with the i luid from said seal.

18. In an apparatus for handling dust laden air, a suction air chamber formed by relatively movable inclosing members havi-ng a clearance space therebetween, and means for introducing a liquid into said clearance space and for feeding said lit uid into said chamber to flush the inner sur ace thereof by the suction within the chamber.

19. In an apparatus for handling dust laden air, an air chamber formed by relatively movable inclosing members having a clearance space therebetween, means for relatively moving said members to develop a suction within said chamber, and means for introducing a liquid into the clearance space between said members to form a seal and to flush the inner surface of said chamher by the liquid drawn therein from said seal.

In testimony whereof I utiix my signature