US1515662A - Pump - Google Patents

Description

W. R. DE MORE PUMP I Filed Jan. 18. 1924 Z Sheets-Sheet 1 WITNESSES W253. Dex/am;

V I ATTORNEYS Patented Nov. 18, 1924.

outrun srarss WILLIAM RICHARD DE MORE, OF JACKSONVILLE. FLORIDA.

PUMP.

Application filedrJanuary 18, 1924. Serial No 687,071.

To all whom it may concern: I

Be it known that I, WILLIAM RICHARD DE Moan, a citizen of the United States, and a resident of Jacksonville, in the county of Duval and State of Florida, have invented certain new and useful Improvements in Pumps, of which the following'is a specification.

This invention relates to pumps and is more particularly directed to a. device for inflating tires.

An object of the invention is the provision oi a pneumatic pump which has a direct stroke and complementary leverage stroke whereby a greater degree of pneumatic pressure may be had.

A further object of the invention is the provision of a pneumatic pump for inflating tires which will eliminate lost motion in the first part of the stroke of the pump this portion of the. stroke being a direct drive until the resistance becomes too great for ordinary strength and then a lever is operated to complete the stroke so that an ordinary person may compress three or four times the amount of air with approximately the effort required in the ordinary pumps.

7 A still further object of the invention is the provision of a pump which will supply air under pressure throughout the full movement of the plunger and whereby substantially no air will remain in the cylinder of the pump when the stroke has been completed.

This invention will be best understood from a consideration of the following detailed description, in view of the accompanying drawing forming a part of the specification; nevertheless it is to be understood that the invention is not confined to the disclosure, being susceptible of such changes and modifications which shall define no material departure from the salient features of the invention as expressed in the appended claims.

In the drawings:

Figural is a vertical section of a pump constructed according to my invention.

Figure 2 is a fragmentar 1 plan view of the same.

Figure 3 is a horizontal section taken along the line 33 of Figure 4.

Figure 4 is a vertical section taken along the line H of Figure 3.

'Figure 5 is a vertical section similar to Figure 1, showing the pawl disengaged from the plunger rod V Figure 6 is a view iniperspective of a spring retaining means for the operating levers of the pump. a V

Figure 7 is a view in perspective of the loosepivotal connection for the operating levers with parts located in disengaged relation. i

Referring more particularly to the drawings, 1 designates a base member having an upstanding annular flange 2. adaptedtoreceive the lower endof a pump cylinder 3.,

The upper end of the cylinder is closed by a cap 4.

Mounted for reciprocation Within the cylinder3 is a plunger 5. 'The plunger comprises a pair of plates 6 and 7 havingsecured therebetween a flexible gasket 8 which is usual in pumps. The plates and gasket are locked in rigid relation by means of nuts located upon opposite sides of the plates 6 and 7 and having threaded engagement with the lower ends of the rods 9 and 10. The rods are movable through perforations in the cap 4.

Coil springs 11 surrounding the lower ends of the rods 9 and 10 have their lower endsin engagement with the securing nuts upon the inner plate 7 and their upper ends engaged by the perforated lateral extensions 1201? the U-shaped bracket 13. The rods 9 and 10 pass through theperforations in the lateral extensions 12, with the extensions being slidable on said rods.

A centrally disposed rod 14 passes through a central perforation in the cap 4 and pro jects beyond the cap and has its one end locked by means of nuts to the bridging portion of the U-shaped member 18. AVco-il spring 15 surrounds the lower end of rod 14, and is secured to the rod at its upper end and has its lower end abutting the U- shaped member 13'. 1

The inner wall of the base 1 is provided with sockets 16 adapted toreceive the nuts 17 on the rods 9 and 10 and the base member is likewise provided with an annular groove 18 to receive the depending flange of the gasket 8 so that when the piston is placed in its lowermost position the nuts 17 will fit in the pockets 16 and the depending flange on the, gasket 8 will fit into the annular groove 18 and thereby permit the plunger to contact with the-inner wall of the base member 1.

A sliding cross head 19 is rigidly conuected with the upper end is provided with arcuately shaped end grooves engageable withtherods 9- and; whereby the cross head will be adapted to slidebetween the rods 9. and 10 andlbe. guided thereby. A lover. 20-is pi'votally: con nected byzmeansof the link 21 to the cross head 19::wflhile a lever 22 is pivotallyv connected by means of alinka23' to the cross head. The. leversare providedw'ith hand grips 2 luat= their. outer. ends whereby the same may be operated. Ablock .25 is rigidlyconnected? tothe. upper; ends ofthe rods ands 10 and. has its ends upturned: as shownz1at26. and provided. with slots 27 adapted to receive a bolt 28 mounted in the. perforationszin; theibars 29 which cooperate to support thelevers20 and .22. The: engagement-oi'ithebolts 28 .in the slots 27 pro vides.a:..'t'ulcr:u1n for the operation of the lovers.

In order to prevent the bolts 28 from be ing. displaced from. the slots 27' when the handlesor: levers 20 and;22 are operated I provide a=locking member 30 having a depending arm. 31 and perforated ears 32 which receive the bolt 28: The depending armrfil iS provided with a lug 33 which. is adaptedto engages beneath the outer projeetin-g; ends otthe blook 25, as shown in Figured. The flat portions 3%. of the mem hers 30-aareiadaptedto engage at the rear of the upstanding portions 26 at the ends of the block: 25 and prevent outward movement. of the. looking member- 30. Whenit isdesired to. release the handles-orlevers 20 and. 22 from the fulcruming slots 27 the armsr3'1; due to their resilience, are forced laterally. outward to-v remove the lugs 33 from beneath the block 25 wherebythe lower endsofsaidarms may be oscillated inwlardly and causethe flat portions 3+l to be swung to.a.-.position above-'- the tops of the upstanding portions 26. Byexerting a lat-. eral pull on the levers 20 and 22 the bolts it-l: are. disengaged from the slots 27.

Therods 9 and10 are: provided with a plurality of spacednotches 05 adapted to be engaged? by. pawls 36 inorder to lock; the rodsaagainst upward movement at certain. times during the upward movement of the levers20 and 22.

The: rod: 1 1 is provided with notches 37 adapted to-be engaged by a-pawl38 r'or pre venting upward: :movement 1 at certain times, ot said rod. These: three pawlsarepivotally mounted on a rod 39 which is mounted of the rod let and.

in bearings formed on the ends of plates 40 secured to the inner face of cap l. A U- shaped bracket ll supports the outer ends of. the pawls and is forced,- u-pwardly by means of a spring42 whereby the paw-1s are maintained out of engagement with the notches in the rods 9, 10 and 141. The U- shaped bracket 41 is pivotally mounted on the rod 39.

An actuating rod 4:3 is mounted for sliding movement. in brackets a l. A. spring 15 between, the lower bracket 14: and a nut or enlargement 16 on the end-of the rod is adapted to, maintain: the-rod depressed-:01 in its lowermostposition- A? lever 47 piv otallyi mounted at d8 has its inner end-.101 c-ated beneath thenut onatherodl?) so that when, the outer end of lever L7. is depressed the rod will be elevated.v The upper end of the rod is provided with a Uslraped member withthe endhO- passing through a perforation in the. cap land adapted to engage one end of the bracket tl: and force said, bracket downwardly against thetension ofthe spring 12 and permitthe pawls to fall into engagement with their respective notches in the rods 9, 10 and ltand prevent upward movement ot'jtherods when the levers 20 and 22 are elevated. An elongated :boss 51 dependingfrom the. inner face of :cap i .is provided with passages in which. the rods 9, 10 and 14 are slidable, the boss forming a bearing; for the upper ends of the rods.

When the arms 20 and 22. have been moved laterally outwardcausing the bolts 28 to become disengagedfromtheslots 27, the arms may. be positioned longitudinally oi? the cylinder- 3 and locked. against displacement bya spring member 52..v

The spring member is provided. with hooks 53 :at its outer, end which engage the hand grips 2 1' and maintain; the grips, adjacent .the outer wall of thecylinder B. The substantially annularw central portion of the spring member 52 embraces the cylinder 3.

it will-be noted-from Figures dand: 5 that the portion 5d of pawl 38isshaped slightly ditt'erent from the portion 55. of: the pawls 3 so that the pawl 38- willenga-ge its respective. notches in the rod 1' 1 more readily that the pawls36 will engage their-respee tivenotches in therods 9-.and'10.

The operation of my, device is as =follows 2 In the normal operation of the-pump the outer end gofthe lever, 47 is depressed thereby elevating the rod 43 and causing the member on the upper-end of the rod to be raised from, the, Ui shaped' bracket 4-1 thereby: permitting the-spring 12. to elevate saidv bracket and'likewise the. threepawls out of engagement with the notches-0t the three rods19., 1.0.and 1.4. Bypulling; upon the handles 24:, the plungertogethers withthe three rods, are simultaneously elevated.

thepawls will engaged the notches in their- Pressing upon the handles 24: downwardly will cause a simultaneous lowering of the three rods and the piston 5. The down stroke is continued until the downward movement is ,sufiicient to become laborious to the operator of the pump. At this time the lever 47 is released permitting the rod 43 to descend and thereby causing member to be moved downwardly and lower the bracket 41 against the tension of spring 42 so that respective rods. An upward pull is exerted on the handles 24; when the pawls 36 engaging the notches 35 will prevent upward movement of the rods 9 and 10, and since the levers 20 and 22 are rocked on their a. in

pivots 28 the cross head 19 will be depressed through the links 21 and 23. This causes the lower end of rod 14 to be depressed,

carrying U-shaped member 18, and the lateral extensions 12 downwardly, and compressing springs 11'.

As soon as the cross head has moved down to its normal position by the upward pull of the handles 24, the handles are depressed forcing rods 9 and 10 downwardly while rod 14 is maintained stationary since it is engaged by pawl 38. When rods 9 and 10 are lowered piston 5 is also lowered thus connpleting the stroke ofthe pump, and since piston 5 is adapted to contact with the inner surface of the base of the pump all the air is forced out of cylinder 3.

The release of lever 47 raises the pawls from their respective notches so that the piston 5 and rods 9, 10 and 14 may be elevated "freely.

Rods 9 and 10 are devoid of notches at points where the acting ends of the pawls are in engagement with said rods when the rods are at the end of their stroke. The upper notch on each rod 9 and 10 being located below the pawls when the rods are fully depressed.

Ratchet 38 by reason of the difierence in,

its construction over that of ratchets 36 will become disengaged while ratchets 36 are still engaged.

lVhat I claim is:

1. A pump comprising a cylinder, a piston, a plurality of rods connected with the piston, a plurality oflevers forming handles tor direct reciprocation of the piston for a portion. of the stroke of said piston, fulcrums for the levers,'and means causing one of the rods to remain stationary when the levers are rocked on the fulcrums and for permitting reciprocation of the other rods to complete the stroke of the piston.-

2. A pump comprising a piston, a. plurality of rods connected with the piston, a plurality of levers forming operating handles for direct recipocation of the piston for a portion of the stroke of the piston, means connecting a pair of the rods rigidly together and provided with fulcrums forming a pivotal support for'the operating levers,

levers are rocked on their pivot points for completing the stroke of the piston through thepairs of rigidly connected rods.

3. A pump comprising a piston, a plurality of rods connected with the piston, a plurality for direct reciprocation of the piston for a portion of the stroke of the piston, means connectin a gether and provided with :tulcrums forming a pivotal support for the operating levers, resilient means connecting the pair of rods with the other rod, and means for maintain ing the last mentioned rod against movement whereby the levers are rocked on their pivot points for completing the stroke of the piston through the pairs or" rigidly connecting rods, said resilient means permitting movement of the last mentioned rod independent of the pairs of rods whereby the levers are set for further rocking movement.

a pivotal support for the operating levers,

resilient means connecting the pair of rods with the other rod, and means for maintainmg the last mentioned rod against movement of levers forming operatinghandles pair of the rods rigidly to-- whereby the levers are rocked on their pivot points for completing the stroke of the piston through the pairs of rigidly connected rods, said resilient means permitting movement of the last mentioned rod independent of the pairs of rods whereby the levers are set for further rocking movement, and means for retaining the pair ofrigidly connected rods against movement during certain strokes of the levers. I

5. A pump comprising a piston, a plurality of rods connected with the piston, a plurality of levers forming operating handlesoi directreciprocation of the piston for a portion of the stroks of the piston, means connecting a pair of the rods rigidly together and provided with fulcrums forming a pivotal support for the operating levers, resilient means connecting the pair of rods with the other rod, and means for maintaining the last mentioned rod against movement whereby the levers are rocked 011 their pivot points for completing the stroke of the piston through the pairs of rigidly connected rods, said resilient means permitting movement of the last mentioned rod independent of the pairs of rods whereby the levers are set for further rocking movement,

head with meansifor-retainingthe pair; of rigidly connectedjrods against up ward movement, the

retaining: means for the other rod permitting-downward;movem.ent of. said rod when the levels are rockediii one direction.

: ton aportion of the stroke of the piston,

meansoonnecting a pair,- of the rods rigidly together and provided with fulcrums forming. a. pivotal support: levers, resilientmeans connecting. the pair o fzsrods: with the. other rod, and means'for maintaining thelast mentioned rod against movementwhereby; the levers are rocked on theirpivotapoints for completing the stroke of: the pistonthrough the pairs of rigidly connected. rods, said resilient means permitting..movement of the lasttmentioned rod independent of; the-pairs of. rods whereby the levers are set: for; further rocking movement, means for retaining thepair-otrigidly connected rods against upward movement, the retaining meansdior the other rod permitting downwardmovement of said-rod when the levers-are'rocked in one direction, and means forimanually: releasing the: retaining means fronroperative relation with the rods.

7. A pump comprising a cylinder, a. piston, a plurality of'rodsconnected with the piston, a plurality of: levers forming handles for 'direct reciprocation of the piston for aportion-of the stroke of' said'piston, fulcrums for the levers, and means causing one of the rods to remain stationary when the levers arerock'ed on tliefulcriims-and permitting reciprocation otthe other rods to complete the stroke ofith'e piston, a bracket slidahly: mounted on the rods and resilient ineans o-n the rodsior connecting the rods togetherand permitting-relative movement between certain of the rods.

8; A'pump comprising a cylinder, a piston, a-movalole block, a rod operating. in the cylinder connected at one end to the-block andiconnected} at itsother-end to the piston, a cross head, means connecting the cross the piston, levers pivotally. mounted onrthe cross head, and links connecti-ngthebloclcwith the levers.

9. ih' pumpcomprising a cylinder, a piston, a movable block, a-rod operating in the cylinderconnected at one-end to the block and Zconnected 3 at its other end-to the piston, a" cross head, means connectingthe cross head" with-thepiston, levers pivotally. mounted" on -the cross head, and. links connecting with the piston, a

operatingfor the operating the block with the levers, means engageable,

with the rod for, maintainingthe rod/against movement in one direction, neansengage: able withthe connecting means between the piston andthe cross headfo-r maintaining saidjmeans against movement in one direction.

10. A pump comprising a, cylinder, (t-piston, a movable block, arod'operatiiig in the cylinder connected'at one end] to the block and connected at its-other, end to tliepiston, a cross head, means connecting the cross head with the piston, levers pivotally mounted on. the cross. head, .and.links conin one direction, and means,adaptedtohold the maintaining means against operation.

11. A pump comprisinga cylinder, a piston, a plurality ot'rods COIlIiQCtBdflVltli the piston, said rods being; provided with notches, spring pressed pawls adapted to engage the notches, a crossfheadrigidly. connected with certain of the rods, leverspivotally mounted on the cross, head," a block rigidly connected with the other i'od, links connecting theleversto the block, said'pawls, being adapted to lock the pair ot'rods against reciprocation and permit. reciprocation of the other rod when. the leversare operated, one of the pawls adapted. to enthe other. rod and maintain itagainst reciprocation while permitting the levers to oscillate the' pair ofrods.

12. A pump v comprising a cylinder, apiston, a plurality of rods.connectedwitlr the piston, said rods notches, spring pressed pai ls adaptedto, engage the notches, across heath rigidlyconnected with certain of the rods, levers pivotally mounted on the cross head,,a block rigidly connected with the OthGI YOCL-dlIlkS connecting the levers to the block. said pawls being adapted to lock the pair of rods. against reciprocation and permit. reciprocation of the other rod when the levers are operated, one of the pawls adaptedto engagethe other rod and maintain it against reciprocation while permittingthelevei's to oscillate the pair of-rods, and manual means adapted tohold the pawls, in an inactive,

position whereby all the rods are simultaneously. reciprocated by the levers...

VVILLIAM' RICHARD DE MORE.

being, provided with.v

Images