CA2072212A1 - Container for the spray-dispensing of liquid - Google Patents

Abstract

ABSTRACT OF THE DISCLOSURE
The invention relates to a container (1) for the spray-dispensing of liquid (2), having spray nozzle (D) arranged on the head side of the container (1) and a handle (14) for a pump (P) associated with the container, which pump has pump cylinder (6), piston rod (16) and pump cylinder for the production of a cushion of compressed air above the surface of the liquid (8), and, in order to obtain a structural shape which is free of residual pressure and avoids a springing back of the piston rod (16), it proposes that the pump cylinder (6) at its lower end forms a pressure-relief opening (35) which can be moved over by the sealing surface of a cuff (22) which forms the pump piston, said opening being in flow communication with an outwardly open tube cross section (17) of the piston rod (16) when the pump piston (22) is in depressed position.

Figure 5

Description

CONTAINER FOR THE SPRAY-DISPENS~NG OF LIQUID

The pr~sent invention rel~te6 to contain~r~ ~or ~he ~pr~y dispen3ing of liquid, h~vln~ a ~pray noz~le arranqed cn th@ top of the container and a handle for a pump which i~ oaiated with the ~ontainer and ha~ a pump cylinder, pi$~on rod and pump pi~ton for producing a cu~hion ~f compras~ed air above the ~urface o~ ~he liquid.
Dispensers Or this ~ype are ext~n~iv~ly replaoing ~pray devices which operate with propul~ion ag~nts whioh are ~nvironmen~ally objectionable. one device o~ this type is known, ~or instance, ~ro~ US Pater,t 3,955,720, Fig. 12. The pump handle of the can be locked on the container in tho basi~
po~ition. The top or hsad surfaae of the contalner ls pro~ided ~or thi~ purpos~ with a cons~riot~oh having a detent ~roove d~velo~ed on its inner side. The plate~haped edg~ o~ ~he handle engage~ into ~aid groove. In this way, any re~ldual pressur~ remaining in the pump is prevented ~ro~ li~ting the pUh~p }landle out of the basi~ po~ition and lnto an unde~ina~le pro~ruding posltion. sincR the ha~dle can pass into this locked position ~pon no~al a~tuation of the pump already a~
the full stroke, this measure, however, pro~e~ troublesom~ .
6ince th~ handle must then b2 p~lled out aga1n with di~iculty at a tubu-lar connec~orpiec2 whi.ch ext~nds outward ~eyond ~he plate. ~ll thi~ impairs the operation of su~h propellant-~ree containers or ~ispen~ers~ Further~ore, ~he ~ction of heat c~n lead to suGh Gonditions of exp~nsion that the in~ernal pre~ure , ~

-overcome~ said detent. means, re~ulting in cr~eping out and aven in a protr~ion which 1ift~ ofP the protective cover.
AoGi~ehtal contact with article~ contained in a b~g can re~ul~
un~avorably i~ ~h~ unde~ired rQle~s~ of th~ 3pray devic~. ~he passage o~ ~ir i~to the in~ide of the container ~akes plaoe fur~hermore a~ the b~ttom o~ the pump ~hich extend~ ~rom ~h~
top into the container. Dependi~g on ~he level o~ ~illing, the air i~ ~orced through the liquid. This, a~ a rule, cau~e~ a gur~ling noi~e~ There is furthermore the di~advantage that, with the passage o$ time, liquid ~eaks outwa~d over the air-feed path. This not only consti~u~es a loss but also decreases the acaeptance of ~uch dispensers.
The object of the present in~ention i~ to develop ~
~i~p~n~r o~ ~his type in ~ manner wllich is more favorable from ~he standpoir~t o~ use and handl ing whlle avoiding the a~ovemer~tioned disa~vantage of l:he springing bac~}; of the piston .
This ob~ ~c~ is achieved by the inventioh ~et forth in Claim 1.
~ h~ dependent clai~s contain advantageous further develop~e~s of tha dls2ense~ o~ the invention.
As a result of this development a oontainer of this type fo~ the spray dispensin~ o~ uid is obtained which ls of increased value in us~. This result i~s ob~ained in the manner that the pump cyli~der ~orms at its lowe; and a pressu~e~
rele,ase opaning which can b~ mGved over ~y ~he sealing sur~ace of a cu~f whi~h forms the pump pis~on, ~ai~ opening, when ~he pump pis~on i~ in it~ depre~ed po6ition, being in Plow communic~ion wi~h ~ tubula~ cros8 ~ection of the pi~ton rod whic~ i~ op~n ~oward~ the ou~side. The rele~e ~f pressure i~
ct~d b~hind th~ re~r ~f ~he piston body via the tubular ~ro~5 6ec~ion o~ ~he pis~on rod. The corresponding relQase of tha pres~ure t~kes place suddenly. No sp*cial detent mea~s whtch inc~ease the co~t of the syste~ ~re require~ ~he actuating handle nevertheless ret~in~ it~ ba~ic po~ition ~imply by th~ utilization of frictional force. Another advantageous fea~ur~ o~ the in~rention is that the ~Uf~ iS olipp~l on~o a central mandrel o~ the pis~on rod and a mushroom-~haped projection of the ~andrel exten~s into the cup hollow o~ the cuf~ an-~ has incisi~ns which e~tend to the wall of the mandrel and ~re in flow communlcation ~lth a paE,sage. This assures the des~red dependable valve fun~tion ~y extre~ely simple ~tru~tural means. I~ is fur~h~rlr~or~ proposed t.hat ~n encasing tu~e be pla~ed ove~ the pum~ cylinder, E;aid ~ube he~ng in clipped po~iti.on with respect to the pump cylinder and forming the bottom of the pump cylinder. In this way, a ~eparate bottom-forming struc~ural par~ is unnecessary. Another featur~
is ~hat the cap bo~om h~s ~n opening for ~he pa~sage of the ~ ntaXe ai~ through the tubu~ar piston ro~. ~he ~ccon~ri~
po~tion oî the grip-forming portio~ o the cap also restrain~

the user fro~ holdin~ the ~ub~lar piston rod closed. The desire~ ~ed cf air is tharefore al~ays established upo~ pump m~v~men~. Furthermore, the de~elopment ls characterized by an association of the cuff arran~e.d on ~h~ end of the pi~on rod :

wi~h a central passage so ~hat i~ forms a ~ealing ~ur~ace of an air-inle~ valve a~ a result D~ relat~v~ di~placemen~ with respect to the piston rod, the corresponding valv~-sea~ ~ur~a~
~eing ~ormed by an annular rib of th~ piston rod th~ annul~r-rib diameter o~ which is larger than th~ ~entra~ passage. In this way, the plston body forms at the sam~ ~ime a valve body.
It is furthermore proposed that the relative di~placement con~is~ o~ an axial displacement and that ~he bottom of the cup of th~ cup-shaped cuff close a~ leas~ one inle~-valve passage hole ~n the reqion of the bottom o~ the pi~ton rod. The pressure produced in the pu~,ping direction in ~ron~ o~ ~-he pi6ton pushes the cu~ back and the ~ear of the lat~er applie~
itself ayain~t the other sealing ~urface. For an e~ually ent1 tled dl~tributlon of the alr ~rawn in upon the return s~ro}c~ it is ~dvan~ageo~ls to provide several pa~age holes di~tributed ~t eq~ ngles ap~rt. One ~va~tageou~
developm~nt is furthermore obtained by an enc~sing tube which surrounds th~ piston cylinder so a~ ~o itorm an alr-guid~n~e ~h~nrlel i~rom the l~wer ~nd ~ the pump ~Ip into the reglon of the uppe.r part of the container, i~ termina~ing the~e as a~r-bu~let opening. In this way, the co~pressed ~ir which ~ollects above the ~urface of the l~quid is no longer forced gurgling through the liquid but is drawn very silently into the accu~ulator. Tha air assumes practically a U-shaped defleoted path: en~ranc~ via ~he ~ubular piston rod, de~lec~ion at the lower end o~ the cylinder, and entrance into the return-air passage channel. In order to prevent the liquid f~o~ ~lowing bao~c into the region o~ the aylinder, the air-outlet opening of the air-pa~;~age ~hannel i~ cloGed by an outlet valve whlch i~
arranged direct:ly ~elow the cave~ of the container. Here, also, the three-dimensional shape of ~he enca~ing ~u~e is excell~ntly ~ltili zRd ~nd the outlet ~alVe ~ ~ ~o ~haped that it can be placed a~; cover body over the ~naa~ing t:ubo. one u~Qful further ~e~ture is th~ the cover body has a f~s~ening coll~r which is clamped bet~een a screw connec:tion forming ~he pump ~ingle-hole and a pump-holdlng cap s~rewed thereon. The fastening collar serves in thls connection at the ~ame time as packing ring h~tween ~;aid par~s. The ba~ic ~la~tici~y or flexibility of the matorial pe~mitC the ~urther devQlopment ~h~t the cover ~ody terminates in a valve llp comparable to a bicy~le valve. The valve lip extends ov~r ~he air-outlet openin~ It is furthermore found favorable for th~ pump handle to grip c:ver ~he pu~.p-holding ~ap. SUah a 801ution is pa~ticularly sa~r~ng in ~pace and also has a stabllizing effect w~t:h re~pe~t to the a~:tual gripping zone and the handle.
Fur~h~rm~r~, it 1~ advant~eous f ~r ~he pump handle and/or spray noz zle each to have individual holes ~o be used a~
~illir,~ openings whi~.h lie approximately in th~ cen~ers o~ ~che narrow-sid~ roundings of th~a ~ontainer, which is o~ elongated ~.ross section. The i~len~lcally developed individu~l holes permit an option~l, i.e. ~ttachment (~i~). Therefore, ~or example, the pump having the handle can be attached, it alway~
fitting regardless of what individual hole is in ~ront of the n\oun~lng h~ad. The ~ame applie~ to th~ spray noz21e. The lniti~l equipment areat~s ln e~ch case a dlfferen~iating mean~
for the exaot alignment of the other individual hole~ on the f~lling head. The functional part which is ~till l~cking i~
then attaahed~ Both indi~idual hol~o can e~en be usQd simultan~ou~ly as fi~ling operllng~. Ther~ore, minl~um cycle tim~s ca~ be ob~lned in ~he fillin~ line. Due to the fac~
that the indivi~ual hol~s li~ approximat~ly in ~he center~ ~
narrow-side round~.gs of ~he container, ~hich ~s of ~longated ~hape and cro6s seotlon, the tra~sport path c~n even be ~hort~ned, ainc~ ~he individu~l holes which are u~ed a~ filling open~ng~ can ~e dir~c~ed ~ran~vers~ to the direation of tran~por~. 0~ the other hand, i~ th~ ~lignmen~ whlch is more favol-able for th~ provision with the ~unc~ional part~ ~ to apply, it i6 advi6~bl~ to move the con~ainer in ~hQ directlon o~ its longe~t ~id~ in ord~r to give th~ ~ripping tools, etc., t~e ~ecessa~y spa~e. Ac~ordingly, th~re are properti~s whic~
yo ar beyond the fun~amental advantagel3 of a con~ainer developed ~s a double ~ottle. With raspect ~o khe advanta~e~ :
in us~, the ~aid cross-sectional shap~ i9 more ~d~orAble than a cylind~ical shape, ~i~Ce th~ correspondi~g cro6~ ~a~ion fuhotion6 as adv~ntageous safety against turning ~pon the inlti~l filling as well a~ upon the ~u~sequen~ fllling. Such high hol~i~g forc~s as, for inatanc~, in the. case of a cylindric~l cont~in~r or con~iner of rot~tional ~ymmetry need not be applie~ also ~ests bet~r in one'~ hand. ~he position o~ th~ individual holea in the vicini~y of the narrow-~ide roundings i therefor~ ah ex~remely logical pla~e: on the .
', '~ ~ ' ,' . ' on~ han~, th~ ~u~thes~ po~sibl~ distance apart o:E the ~unctional part~ from each ot:her and, on th~ oth~r hand, a conc~en~ra~d, easily viewed ~Lr~angemen~ of thes~3 functional parts upon U8e. Since th~ individual holes are de~eloped on ~he ccntainer lt~elf, the container can ~e establi~hed a~ a blow container. Thi~ i6 ~truc~urally ~imple and favor~bl~ from a pri~e ~tandpoint. Further~ore, it is proposed that ~he pump handle and spray nozzl~a each be provided with a head part which interchangeably fits both individu~l h41e~. Such a head p~rt czn advan~ageously be developed as an in~egral element of the corrosponding ~unctional part a~td therefore, ~or instanc~, in the ~orm of ~ screw ring, a screw cap or the 1 ike . The contairter-side at~achmertt i8 then solved accordingly in ~lally advan~ageo~s manner in the manner tha~ upward-facing screw connec~lon ex~nd ~rom the cover~ The aorr~sponding pclydirectionali~y of portion~ of the we~ll lead~, ~e~pite ~he thinnest possible w~ll thia~ness, to an attachment base which i~ in it~lf very ~able. The str~6es comi~g ~rom the movement of the pump are al~o taken up )~etter. P'urthermore, the pump handle is developed as a ~ap which is turn~ble together wi~h the pump piston rod ~nd which hGts a downwardly open cavity to grip ove~ the spray nozzle. In thi5 way, th~
pump ~andle is imp~trted a double func~ion sincs it, at the ~a~e time, f~rm~ a widet~ed pro~ec1:ive cap. Here, the substantially equally high neigh~oring po~ition and the ec~::entr~ c associatLon of the pump piston rod, which n~w, at the same time, forms an axi~ for turning, Qtre even m-asures of independent importance ~ince they form an anti~turn lock in th~t ~nd po~ition of shor~ened lenqth. The for~-~it~ing langagQment avoids arly turning in this position. Only ~ er intQntional lifting of the c~p can thel latter be brough~ into protruding grip position, which facllitates the pump actua~ion, similar ~or injtance to a hook grip of a walking cane. It is ~urthermore propo~ed ~hat the ~ase sur~a~e of the cap be geometrically s{mllar to the head ~12r~ace of the ~ontainer. Such a cap re~ts readily in one's hand, corresponding to ~he selected cros~-~ec~i~nal shape of the container.
The o~j ect of the invention iEi explained in ~urther detail below w.ith ~eference ~o two em~odiment~ shown in ~he drawing, in which:
~ig. 1 ~hows the contain~r developed a~ dispenser in a perspective view of the f irst embodim~nt, protectivq cap at t~e s~me ~ime form.lng the pump hnndle and being swurlg 1~0 out of ~he oorresponding pro~ectivQ position 1 Fiq. ~ is a ve~ical section through this dispan~er in the b~sic position;
Fig. 3 shows the dispenser according to the second embodimQnt~ ~Ben in side view;
Fig. ~ is a top view thereof~
~ig. 5 ~hows this dispenser in eL vertioal section of the attached separata protective ~ap;
Fig 6 is a se~tion along the line vI-VI of Fig ~, and , - ~ .

;, ' Fig. 7 i5 a ~tion in acao~dance wi~h Fi~. 5 but on a larger ~calR and in pump-ac~ua~ing po~i~ion.
~ he aontainer 1 which is to be ~;ed as dispense~- Sp is inte~ded for the dispensing ~y ~prayin~ of 'i~uid 2~ ~or thi~
purpose, it has a function~ unit re~erred to A5 ~he ~pray nczzl~ ~ and a funct~ onal unit re~erred ~o as the pump P. The two of the~ ar~ located, accessiblQ for actuation, a~o~e a head sur~ace 3 o~ tha container 1, over which there exten~ ~ head part 4 of the noz~1~ D and a head pa~t 5 of the pump P.
The con~ainer i i9 developed a~ ~ ~lo~ ~ont~i~er. ~ pump cylinde~ 6, ~t~rting fro~ th~ head part S, extend~ into ~he ln~ e oX the contair-er 1 ain~os~ to its ~ottom 1 ' . ~he bottom spli~ 90 ~s t3 produce the i~pression of a sort of double ~o~tle.
r~3er tube 7, on the o~h~r hand, ex~ends from the head piec~ 4 o~' t~lQ nozzle D parallel to the p~p P, Pump ~yl lnder 6 and riser tube 7 extend over ~he predomi~ant part o~ th~iir l6ng~h into t~le llquid ~, ~h~ sur~ace of which lyin~ in ~he uppar third of th~! container 1 is da~ignated 8.
For ~ne pa~sage ~f ~he corre~ponding func~ion~l unit~ (P, D), ~her~ are two eiqually large, i~entically shaped ~ndividual holes 10 on the head ~urface 3, or, more preci3~1y, in the ~n~a~ner cover ~ These holes are extended upward t~ form correspondin~ly iden~ically ~haped thxeaded connections 11, throllyh the external thr~ads of which ~he head pie~ies 4, 5 are ~crewed.

' -` , ` `'~ ` ~

.

~ he heigh~ of the thr~ad~d conn~ations 11 corrQ~pond~
approximately to half the in~id~ diameter o~ ~he individual hole6 lo.
As can b~ noted from the drawings, parti~ularly Fi~
and 4, the individual holes 10 lie approximately in the cent~r x and x of narrow-side convex rounding~ 12 o~ the container 1 which is of elongated cr~ 6ection. Ref erence i5 had, in particular, to Fig. 4. From it, i~ can also b~ no~ed tha~
there i~ con~erned an ellipti~al C~OS5 ~ection the wide-side convex raundin~s o~ which are de~igna~d 13~ Of course, an oval could also ~e concerned. EvPn a slightly concave depres~ion of the wide-side roundings 13 woul~ still fall within the chara~ter o~ the ~lat body o~ the container 1.
The iden~ically shaped region of the individuai holes 10 permit~ optional attachment of the pump P or ~pray nozzle D so that, upon the initial o~cupying o~ th~ one i~dlvidual hole ~0, the o~her ind~idual ho~e then acts as :Filling openin~ and, vice versa, in wh~oh connection clear orien~ation featu~es are already e~tab~ished ~y the correqpon~ing initial attachm~n~, a~
~ r~u~t o~ which ths fillin~ openlng can be po~itionad preol~ely in the filling line. Furthermore, both individual holes 10 ~an ao~ simultar,eously ~ filling openiR~s depending on ~he exis~ing si~uation, with corresponding subse~uent at~achmen~ of the fu~ction units.
~ he pos~ibility of exchange~bility Whi~h has been explained can be noted clearly fxo.~ a compari~on o~ Figs. 1 and ~ and 1 and 5. In Fig. 1, ~h~ ~pray n~zæle D iB located o~ ~he l~f~ whil~ in the other figur~ i~ is on ~he ri~ht .
Tha vi~ible part of ~h~ Punction~l uni~ "pump P" is its pump handle 14. Tha pump handle 14 is shaped differerltly in the two etnbodiment~ shown. In the 6econd em~odiment (for example, Fig. 5), th& pump h~ndlQ 14 pas~ in~o a c:ap 15 which grips as a pro~ective cap over ~he nead piece 5 o:~ ~hR pump P.
The head piece ~ is in ~his case in the ~orm of a pump-holding cap, i . e. screw cap, which is scr~wed onto the thr~aded connection 11 present there.
A s can be clearly no~ed from Fig. 7, the cap 15 extP-nd6 ~rom the upper encl of a ~ubular piston rod 1~. ~t i~ an in~grAl component of this piston rod 16 of circular cros~:
~ect:i on. It ~orm~ a downwardly open cavity 1~ which i&
a~ncentr~ c tG the tube cros~ sectlon 17 o~ the piston rod 16.
The downward facing edge of the circ:ular c:ap 15 terminate~
direa~ly ln ~rcnt o~ the head sur~ace ~ of ~he container 1 when ths piston ro~ 16 is in ite basia position.
In the ob~ect in accordance with th~ first ~mbodiment, a ~urtner $unction xesults with res~ect to the cap 15, in combinatlon with a top cap 19 which protect~vely extends over both f~c~i~nal units, i.e. p~mp handle 14 and spray noz21e D, in the pushed-to~st~e~ basi~ position. This CAp 19 exten~ in the same way a~ des~ribed ~rom tha upper end of the piston rod 16. It can be p~lled, t~gether with ~he pis~on rod 16, upw~rd into the position of release shown in dash-dot line in FigO 1 .
By turning it 180', e~sily half o~ ~ts contour ~xtends over the elongated cros~ ~ecticn o~ ~he container ~, namely i~ the length of t}le lonyer ellipse ~xis of the contain~r. Naturally, ~0 ' ~otation in one or the other dir~otior~ ~ ~; als~
~u~f icient, depending on what the per~on operating it aonsider~
more conveni~nt. For right-handed person~ or laft-~anded per~ons~ individu~l po~ibllltle~ of adju~tment with regar~ to thi~ exiæt. The cavlty lO which, in thi~ e al~o, i~ open in downward direc~ion, there~r~ ~eleases the spray nozzla D by pulling the cap 15 in upward direction. The c~vity is a~apted to the conical shape of the head piece 4 ~o that by movlng the cap 15 up, a subs~an~ially ~elf-centRring ac~ion is o~Ained.
In thi~ connection, the b~se surface or the edge of th~ ~ap lS
a~ume~ a subst~nti~lly congruent alignment with respect to the head s~.lr~a~e 3 o~ the container 1. These 6urfaces are in any ~vent sub~tantially simila~ in thelr contour.
In both embodiments, the air ~orced into the inside o~ the container 1 i~ drawn in via the ~ubular cross sec~ion 17 o~ the pis~on rod 16. For this purpose, th~ bott~m of the ~ap 15 leavea an opening 20 ln bo~h embodimen~s~. Th~ tu~ular cross sec~-ion of the piston rod 16 is retainecl prac~ically ov~r ~h~
ontire lehgth thereof so tha~ ~he transfer o~ the ~rawn-in air from th~ pu~p aha~.ker 21 takes place in the region of t~e low~r ~nd o~ ~h~ pump Qyllnder 6~ For this purpose/ a pi~ton is ~ea~ed a~ the lower end o the plston rod 16. The pi~ton i~
dev~loped as a cuff 22. ~he edge of the cu~f, which terminate~
in a sealing lip `2~/ forms a cup the opening of which faces downward. ~he ~ealing lip 23 ~lidQs over tha inner wall ~urEace oE the pump cylinder 6.
Ths pi~ton or cuf~ 22 acts at th~ ~am~ tim~ al~o a~ air-inle~ valv~ Vl. For this purpos~, the piston, which i6 fo~me~
of ~lexible or el~s~ic material, i~ displaceabl~ relative to the pi ton rod 16~ The relative di~plaoement is limited and d~igna~ed ~y the ~ree pae~age y in Fig. 7. D~pending on the direction of movement of the piston rod 16, the botto~ o~ ~ha p~ ston whioh ~5 yut ded with frictional loa~c rest~ on itC raar or ~ron~ on ~he piston-rod ~ide. In thi~ way, the air passage ~8 ~lo~ked or rel~ased.
Upon the forward st~roke of ~he piston-rod 16, namely displace~ent in ~he direction of the redu~tion in ~ize of pump ~hamber 21, the rear of the bo~tom of the cup rest~ against an an~ular rib 24 which i~ locat~d conc~ntri~ally ~o ~he lo~qit.udinal-center axl~ of the pl~ton rod 16 and is arranged on ~he end th~reof. ~hiE~ rib forms a valve~fieat surface. ~n this way, inlet-valv~ passage hole~ 26 arranged i~ the bo~to~
reqion 25 of the piston rod 16 are closed. The individu~l inlet-v~lv~ passage holefi 26 are distribu~ed at an e~ual an~le a~ar~ and extend in the vicinity o~ the inner wall o~ the ~ube Gros~ se~tio~ 17. ~he back of the cu~ act~ as ~e~ling surfa~e.
On the oth~r hand, if the ~up bot~om of the piston 22 off from ~aid annular rib 2~, a~ ~akes placo by th~
pulling out of the piston rod 16, the pa~h is free for the ~rawing in o~ the ~ex~ portion of air, the lnlet~valve passa~

-14~
holQ~ ~6 rQceivihg flow co~un~catio~ with ~ aentral opaning 27 in ~he bot~om of th~ cup. Th~ pa sag~ 27 i~ ~ormed by corresponding clearance be~ween ~he cu~ 22 and a oRntrally lying mandrel 28 which axially guides lt. The latter fir~ly ad~oins ~he bo~tom side of the bot~om re~ion 25 of the pi~ton rod 16 and termin~te~ in a mushroom-shaped projection 29. Th~
cu~f 22 or piston is clipped onto this mandrel 28. The upward-fa~inq lower side o~ the mu3hroom-shap~d projection 29 create6 the 1 imi~ I ng stop in this direction ~or ~he piston, which is displaceable with the axial free path y.
For the relea~e o~ the flow path upon the drawing-in process, the mushroom-shaped project~on 29 ha~ notch-like rad.ial~y opening inclu~ions 30 which exte~d up to the wall of th~ mandrel. Dçspl~e the appli~ation of the lower and of ~he clip projec~ion 29, the path through the pump cha.mber 21 i6 in this way alway~ kept open. Qn the other hand, upon application against ~he annular rlb 24, the aforementioned blocking of the ~low path via the pis~on results 6ince the diameter o~ the kni~-shaped annular ~ib 24 is ~reater than the inside di~meter of the ~entral pa~sag~ 27.
~ he pi~ton ro~ 1~ is connected in non-106able manner to the pump ~ylinder 6. ~or this purpose, ~here is a circum~erential stop 31 in or close to the bottom region ~5 on the ou~er wall o~ the piston rod 16, ~aid stop cooperating with a ~atiny s~op 32 on the head piece 5.
~ xi~lly spaced from and substantially ~liyned wi~h th~
hottom region 25 there is an addi~ional annul~r rib ~1 which, ~.. . ..

however, serves predominantly for quidance and, on thQ othQr hand, however, acts as second detent step. For th~ attachin~
and pulling oul of the pi~ton ro~ 1~ an i~ention~l act is re~uired.
The air which pas~s6 vi~ the inl~t valve ~1 ~nto th~ pump chamber 21 1~ conveyed from the low~r pump end up into th~
region o~ th~ upper part o~ the con~ainer. For this purpo~e, the pu~p P has an air-outlet opening 33 dlrectly below the container cover ~. Th~s air-outlet opening 33 is controlled.
An air-outlet valve V2 serve~ ~ox ~his. The ~onnectlon ~e~ween the lower er.d of ~he pump P and the ~ald air-outle~ opening is produced by an ~ir-p~ssage channel 34. The la~ter i~ formed by erti~all~- longitudinally extending yroove in the outer wall of the tubllla~ pump cyllnder 6. Reference is had to Fig. 6.
The per~p~e~al alo3ing of the air-passag~ channel 34 is produced by an encasing tu~e 35 which is placed, restin~ well ayain~t it, on the pump cylinder ~. Sa:Ld encasin~ tube 35 i~
~;Ubs~ tizllly of ~ea}cer sh~p~ and ~y it!s bottom 36 forms ~he lower closur2 ~ the pump cha~nber ~ In ~he region of thi~
bo~tom 3 6 there is provided ~ cl lp mounting in the m~nner that ~ Flip ~ro~ection 37 enters the~e into a co~espond1ng groove on the ou~er surf a~ of ~h~ ~ump cyl inder 6 . The cl ip projection 3' lies i.n a groGve ~8 which is cr~ated as a resul~
o~ the cu~ing of the bottom 36.
For the p~ssage of ~he displac~d air into the air-p~s~age chann~l 3~ of small volume on the right, said ~hannel has, in dot,rn-~ard-direc:ted extension, ~ v~rtica1 ~ran3vers~ ~lot which, , ,, - ~ ;^ :

at the same time, is op~n ~owards th~ pump chamber ~1 ~o as to for~ a pr~ssure-r~lie~ opening 39. As soon as the 6ealing lip ~3 of the ¢uff 22 or pis~on r~aches kh~ pr~ surs-relie~ open~ng 39, there is communic~tion with ~ha atmo~phere via the baak of the piaton throu~h lnlet-valve paEisage holes ~ 6 towardsl ~he tube cross s~ction 17 which pas~es at th~ uppQr snd into the op~ning 20.
Th~ aforementioned control o~ the air-outlet op~ning 3~ is assumed by a so-called ~icycle valve which is switched into the U-shaped return path o~ the air. Thi~ i5 a cover ~ody 40 of ru~ber or 6imilar elastic material or plastic which i5 in t~e sh~pe of a section of hose. The cover body 40 i~ pushed ~rom below onto ~he pu~F cylinder 6. The cover body 40 passe~ in~o a valve li~ 41 of r~duced thicknes~, The valve lip finds its ~al~e-seating sur~ac.e on the outer sur~ace of the cover tu~e 35. Th~ end surface 42 of the latter i~ beveled on the outside. ~ ~as an angle of about 45' with tip on top so that the annular, previously free-standing va~lve lip 41 can be mov~d below without di~ficulty upon the mounting of ~he pump. ~he end sur~ace 42 te~min~tes -- as ~an be note~ parti~ularly clearly ~rom Fig. 7 - at a definite distance in ~ront of the end there o~ ~he air-passage c~annel 34. The portion of t~e ~lve lip which is raised by the outer surface o~ the pump cylinder ~ pe~mi~ the production there, ~ue to the ~onstruction in rotational sy~me~ry, o~ an anhul~r channel 43 where~y ~he air can escape in the ~anner of a check valve over the entire circumference of the pump cross section there.

On thc e~d faaing away from thQ valvo lip 41 and thar~foro the upper end, the cover body 40 passQs ~nto a fastening collar 44 . The collar 1~ e~ on the end of th~ threaded connQctor 11 o:~
the one individual hole lo and ~ct~ there at the ~ame time as~
annular seal on the said threaded connQctor 11.
T~a ann~lar cover of a pump-hol~ing cap, r~fe~red to a~
~crew cap ~5, d~veloped direo~ly on tho pump cylindor 6, ext~nds ove~ the fastening collar 4~. The ~readed engagement permits a ~irm ~i~ht~ning of the fastening collar 44 and thu~ a good seal hetween pump P and container 1~
Equivalent ~ealing ccndit~ons prev~il al~o in t~e ~econd individual holé 10 ~rovided with the spray nozzl~ D, since here, ~l~o, an annular seal 46 lies on the end sur~ace o~ ~he thread~d co~nector 11, a ~crew cap 47 ~eing arranged over ~aid ~eal. Th~ ~wo screw caps 45 and 47 have sawtooth threa~s, in suçh a m~nner tha~ a horizontal flank which r~ce.ives high ~orces lyiny perpendicul~r ~o ~he direo~ion o~ ewi~g 1B
~res~n~. The external thread of ~hc threaded connector 11 i9 adapted to thi~. The air ~lo~ in the threaded ~oint i~
intended merely to indicate thè directlon. 0~ course, ~he horizontal flanks of the thread contact each other without any gap.
~ he spray nozzle D is of conventional con~t~uation and will be only brie~ly des~ribed. ~ consists of a pushbutton 48 which actuates a spray ~alv~ V3. Thi~ button i~ continued in a centr~ ram 49 ~hich i~ held under spring load i~ t~e ~asic position. The compression .spring acting on it bear~ the '. ., ~

-la-r~.ferQnce nu~ber 50 and is ~eated in an in~ert pa~ ~ 51, t~o upp~r sec ion of ~hich forms a s~ring chamber ~or the c~mp~e~ioh ~priny 50 while i~ lower ~eat~on form~ a connecti~n to reeiYe the riE;er ~ube 7.
The insert p~rt 51 is clippe~ into the Co~er ~f ~he ce.ntrally interrupted ~crew c~p 47. There ie involved here a d.ish-~hap~d portion which b~ar~ on it6 top a sealin~ ring 52 and c~aTnps the la~ter ~inst the bottom o~ the cover of the screw ~3ap 47. Th~ hole edge of thP sealing ring S2 lies in tig~.tl.y .~allng ma~ner ill ~r~nt of a transver6e. channel of the ram 4~, whl~h tran~rse ch~nnel 43 is c~nneoted W~ th ~n outlet channel ~4 in the cer,tRr of the ram 49. The latter conduct~
the su~tan~e ~o ~e dispensed to a nozzle 55.
The ce,n~ral region below the sealin~ rin~ 5~ is removed and ls in flow ~on~mur.ic~tion via ~ne or more ai.r ~hannels 56 With the com~ress~d air sp~ce of ~h~ cont~iner 1.
As socn as ~he pushbutton 4 8 is d~pressed, th~ edge of ~he hol~ o~ ~he sealing rlr~g 52 leav~ the peripheral mouth of the t:r~ns~er~3e. chanr~ 1 53. ~hus, the liquicl ~lowing i~ within th~
r~e ~ube 7 oan p~ss, ~u~ 'co the pressure above the surface o~
the llq~id ~, i.nto ~e deli~,ery ~ath, with the admission of optinlally a~omizing air via the air channel~ 56.
Bri.efly ~ummarized, the c~eratlon i~ as fo1lows: By ~ctuat.ion of the pump handle 14 in ~h~3 direction indicated by ~he double-ende~ arrow ~, air is dr~wn via th~ inlet-v~lve pass~ge o~;enings 2~ into the pump ch~nber 21 upon t~e p~lllng out p~ ~e piston r~d 161 ~h~.s i5 possible since the cuff 22 .

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--lg or pistvn lifts with fri~cion lock o~ ~ro~a the ansular r~b 24.
'l~he a-ir passes throuqh the passage ~7 as well as the lnci~ions 30. Upon reaching the end posltion, th~ piston rod is pres~ed downward. Th~ rear of the piston applies i.t~lf in s~aling manner against the ann~lar rib 24. Th~ ~ir enclosed in the pump ch~mher 21 pas3e~ via the pre~su~e-r~lt e~ opening 3~ into the air pa~a~e channel 34 whiçh exten~1s in opposite direction, so as to pass into the upper part o~ the container in the r~gion of the air-outle~ valve V2, In ~orre~pon~ing m~nne~, the valve lip 41 ~ s off re~iliently. Upon reaching the end po~ition, the ~ealing l~p 2~ of the pi~ton pas~;e~ over the pressure-relief op2ning 39. ~ue to the commllnication with the atmospher~, ~her~ i8 immedia~ely a relief of pres~ur~ iA ~he pum~ chamber 21 so that no residual p~e~ure i~ pre~ent which coulcl aause a creeping or 6pringing back of the pi~ton ~od 16.
~f~er a few pump strokes, E;ufi~io1ent pr~s,-lr~ is present and the dispe~ser Sp is now ready ~or use.
In ths em~o~iment shown in P'lg~ 1, in or~r to ~ing abo~lt th~ basic po~itiorl of I he dispen~e~, the ~opcap 19 whi~h ~ct6 th~re ~6 pump handle 14 need merely be E~wung in~o ~he po~ition ~hown in doc-da~:h line in or~er thel~ to en~er into the position ~hown in ~ig. 2.
:~n the ~econd embocii~r.e2lt the separate top ::ap bears the re~renae nulllbe~
~ he optior~al eguipping of ~he lndividual holes 10 h~s alre~dy ~eer, discussed in detail in the pr~amb' e to ~h~
~pe~i~ication .

The features o~ the invention disclosed in the above specit`ication, tlle drawing and ~he claims can be of importance both individually and in any de~ired combination ~or the reductlon to practic~ of th~ inv~ntion. All features disclo~ed are essential ~o the invention. There i~ herewith al~o include~ in the di~closur~ of the applioation the entire diEi~losure of the corresponding/acc:ompanying priority papers ~copy of ~rior appli~ation).

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Claims (17)

THE EMBODIMENTS OF THE INVENTION IN WHICH AN EXCLUSIVE
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:

1. A container (1) for the spray dispensing of liquid (2) with spray nozzle (D; arranged on the top side of the container (1) and a handle (14) for a pump (P) which is associated with the container and has pump cylinder (6), piston rod (16) and pump piston for producing a cushion of compressed air above the surface of the liquid (8), characterized by the fact that the pump cylinder (6) develops, on its lower end, a pressure-relief opening (35) which can be moved over by the sealing surface of a cuff (22) forming the pump piston, said opening being in flow communication with an outwardly open tube cross section (17) of the piston rod (16) when the pump piston (22) is in its depressed position.

2. A container according, or particularly according to, Claim 1, characterized by the fact that the cuff (22) is clipped onto a central mandrel (28) of the piston rod (16) and a mushroom-shaped clip projection (19) of the mandrel (28) extends into the cup cavity of the cuff (22) and has incisions (30) extending to the mandrel wall, said incisions being in flow communication with a passage (27).

3. A container according to, or particularly according to, one or more of the preceding claims, characterized by the fact that an encasing tube (35) which is clip-mounted to the pump cylinder (6) and forms the bottom (36) of the pump cylinder (6) is placed on the pump cylinder (6).

4. A container according to, or particularly according to, one or more of the preceding claims, characterized by the fact that the cap bottom has an opening (20) for the passage of the drawn-in air through the tubular piston rod (16).

5. A container according to, or particularly according to, one or more of the preceding claims, characterized by the fact that an association of the cuff (22) arranged on the end of the piston rod (1) with central passage (27) in such a manner that, as a result of relative displacement with respect to the piston rod (16), it forms a sealing surface of an air-outlet valve (V1), the corresponding valve-seat surface being formed by an annular rib (24) of the piston rod (16), the annular-rib diameter of which is larger than the central passage (27).

6. A container according to, or particularly according to, one or more of the preceding claims, characterized by the fact that the relative displacement consists of an axial displacement and the cup bottom of the cup-shaped cuff (22) closes at least one inlet-valve passage hole (26) in the bottom region (25) of the piston rod (16).

7. A container according to, or particularly according to, one or more of the preceding claims, characterized by a plurality of inlet-valve passage openings (26) which are distributed at equal angles apart.

8. A container according to, or particularly according to, one or more of the preceding claims, characterized by an encasing tube (35) which surrounds the piston cylinder (6) in order to form an air-passage channel (34) from the lower pump end up in the region of the upper part of the container terminating there as air-outlet opening (33).

9. A container according to, or particularly according to, one or more of the preceding claims, characterized by the fact that the air-outlet opening (33) of the air-passage channel (34) is closed by an outlet valve (V2) arranged directly below the container cover (9).

10. A container according to, or particularly according to, one or more of the preceding claims, characterized by the.
fact that the outlet valve (V2) is developed as cover body (40) around the encasing tube (35).

11. A container according to, or particularly according to, one or more of the preceding claims, characterized by the fact that the cover body (40) has a fastening collar (44) which is clamped between a threaded connection (11) forming the pump individual hole (10) and a pump-holding cap screwed thereon (screw cap 45).

12. A container according to, or particularly according to, one or more of the preceding claims, characterized by the fact that the cover member (40) terminates in a valve lip (41).

13. A container according to, or particular according to, one or more of the preceding claims, characterized by the fact that the pump handle (14) extends over the pump-holding cap (screw cap 45),

14. A container according to, or particularly according to, one or more of the preceding claims, characterized by the fact that the pump handle (14) and/or spray nozzle (D) each individually has individual holes (10) which can be used as filling openings and lie approximately in the centers (x,x) of the narrow-side roundings (12) of the container (1) which is of elongated cross section.

15. A container according to, or particularly according to, one or more of the preceding claims, characterized by the fact that the pump handle (14) and spray nozzle (D) are each provided with a head part (4,5) which interchangeably fits both individual holes (10).

16. A container according to, or particularly according to, one or more of the preceding claims, characterized by the fact that the pump handle (14) is developed as cap (15) which can be turned with the pump piston rod (16) and has a downward open cavity (18) to grip over the spray nozzle (D).

17. A container according to, or particularly according to, one or more of the preceding claims, characterized by the fact that the base surface of the cap (15) is developed geometrically similar to the head surface (3) of the container (1).