US2182742A

US2182742A - Spraying apparatus for dental, medical, and like purposes

Info

Publication number: US2182742A
Application number: US165215A
Authority: US
Inventors: Brewer William
Original assignee: SPARKLETS Ltd
Current assignee: SPARKLETS Ltd
Priority date: 1936-12-09
Filing date: 1937-09-22
Publication date: 1939-12-05
Anticipated expiration: 1956-12-05
Also published as: CH201121A; GB467725A

Description

. 5, 1939. w. BREWER SPRAYING APPARATUS FOR DENTAL, MEDICAL, AND LIKEPURPOSES Filed Sept. 22,' 1937 2 Sheets-Sheet l Lge/far L//Mm'rewer Dec. 5, 1939. 2,182,742

sPnA'YiNG APPARATUS Fon DENTAL, MEDICAL, AND LIKE PURPOSES W, BREWER Filed sept. 22, 1957 2 Sheets-Sheet 2 Patented 5, 193.9

2,182,142 srnAmG APPARATUS non DENTAL, MED- ICAL, .LIKE PURPOSES William Brewer,jU pper Edmonton, England, asl signor to Sparklets Limited, Westminsten England, a British company Application September 22, 1937, Serial No. 165,215

In Great Britain December 9, 1936 i claim.

'This invention relates to portable spraying apparatus lof the kind such as is used in dentistry and medicine for the purpose of discharging in spray form under pressure a dentifrice,medica l ment or the like in the form of aliquid-or solution. The invention particularly relates to appa' ratus of the type described in the British PatentA No. 392,433, dated as of October 13, 1932, the saidapparatus comprising a vessel for contain- 1 0 ing' the solution to be sprayed and a lhead re- `movably secured to the upper end ofthe vessel.

A capsule (of .the kind known under registered trade-mark as Sparklet) containing-gas under pressure, such as carbon dioxide, is carried in 5 a holder screwed onto the head and isl adapted to be pierced by a hollow 'piercer in the head,4 when the holder is screwed up, thereby to liberate i the gas. The liberated gas passes through passages in the head and thence into the vessel 2'0 Where it acts to force the solution up a tube 1 .and through a valve-controlled passage in the head. The valve is controlled by a hand lever which operates against the action of a spring and which when actuated permits-passage of the t solution to an outlet pipe removably secured to the. headand provided with a spraying nozzle.

In the `said British Patent No; 392,433, the whole of the gas from the capsule is liberated at once into the vessel and in order to prevent liability of the vessel bursting under the pressure of gas, means are provided for creating an airj lock space which ensures that', when charging the vessel with solution, the latter cannot extend beyond a predetermined level and a suflicient 35 space is left for the expansion of the liberated gas fromthe capsule. y l

VWhere, as in this arrangement, the whole of the gas isinitially liberated into the vessel, the

pressure of the-ejected `solution lgradually de 40 creases'as it is used and, further, the air lock space lrequired. necessitates alarger vessel forv a givenjquantity'of -solution than would otherwise vbenecessary,v "Y l The objects ofthe present invention are to provide means for obviating undue strain on the vessel by the liberated gas and for ensuring that the force of the streamof' solution ejected is as, uniform as possible throughout the period from the piercing of the capsule toits exhaustion. 'I'he present invention consists in a spraying apparatus comprising a container forl solution or the like, a head removably secured to the said container, 'a holder for a capsule containing a pressure medium and a nozzle both secured to the said head, and a manually voperable valve between the container and the nozzle, wherein there` is provided an auxiliary valve between .the capsule-andthe container which is operable independently of the main valve by means of an actu' ating handle projecting through the head. 5

'I'he apparatus is provided witha manually operable valve, arranged at a point between the gas container or capsule and the vessel,.for contro1`. ling the passage of gas liberated from the capsule to the vessel containing the solution to be sprayed. 10 s A lever capable of manipulation by a nger ofv the operator is secured to the stem of the valve and a coil spring is arranged around the stem for maintaining the valve closed and for re-- turning it to its closed position after actuation; 1 5 By the provision of this valve, which is situated in .the'head of lthe apparatus, the gas from the pierced capsulejcan be` admitted to the vessel in small Aquantities s oas to ensure uniformity of pressure of the solution sprayed from the noz- 20 zle and toavoid undue strain on the-vessel.

.The further advantages are attained that first thesolu'tion is not ejected too forcibly but the degree of pressure of the issuing spray can be regulated to suit individual requirements, secondly the ves- 25 sel can be charged to its full capacity with the solution and need be of no greater dimensions than necessary for this purposeand thirdly gas from the same capsule (provided it is not exhausted) can be utilised for a fresh charge of'ao solution or for different kinds of solution since the ;vessel may be replenished by unscrewing it from the head without liberating any gas 'otherthan that' which has been Aadmitted' past the gasv control valve. f 351 -The invention will now be more particularlyv described with reference to the accompanying drawings which`show in Figure ly an elevation partly in section of'an apparatus of the type described in British Patent No. 392,433 and pro'- 40 vided with a-sui'table construction of means in yaccordance with this invention. A l

` -Figure 2 is; a side elevation of the head with,

`the holder and nozzle removed; i

Figure 3 is a view a't right angles to Figure'Z; 45;

'Figure 41is a view corresponding to Figure 2 but showing the partsin section and Figure 5 is a view at right angles to Figure 4 and corresponding to Figure 3 but shown partly in-section.. A 50 Referring to the drawings, I is a'vessel onto z v jwhich is screwed a head 2 carrying .twotubes'l3 and 4' which project into the .vessel to points adjacent lits base. The solution in the vessel is expelled through the tube 3 and the gas from the capsule is conveyed to the lower part of the vessel through the dip tube 4. VA screw-threaded socket 5 is provided on one side of the head and its adapted to receive a holder 6 for a capsule 'I containing gas under pressure, for example carbon dioxide, the holder acting, when screwed up on the socket, to-force the capsule onto a hollow piercerl 9 whereby the gas is liberated into a passage I in the head. From this passage the gas passes through branch passages II and I2 and thence into the dip tube 4. l

The branch passage I I is controlled by a screw,- dowri valve I3, mounted in the head, the stem of which projects beyond the casing of the head and has a lever I4 which can be manipulated by a linger of the operator for the purpose of operat ing the valve I3.. To ensure against leakage of gas around the stem of the valve I3, a stuiilng box nut I5 is provided which when screwed up acts by its conical inner end to force a. packing I6 tightly against the stem of the valve. A coil spring I'I is arranged around the stufng box I8 of the valve, one end engaging the valve lever I4 and the other end entering into a slot I9 in the head 2. To open the valve the lever is. moved vin a rotary direction and operates against the action of the spring, the strength of the latter being such as to permit only slight opening of the valve and to cause its return onto its seating after the release of the lever by the operator.

The valve assembly may readily be dissassembled by removing the spring when the valve stem and the stufling box nut are then free to be unscrewed from the head.

In order to operate the apparatus, the head is unscrewed and the required liquid or solution poured into the then open neck of the vessel I and the latter then'screwed onto the screwed boss 8 of the head. A capsule is placed in the holder and the latter screwed up to eiect piercing of the capsule by the piercer 9 whereupon the gas is liberated into the passages I0 and II. Beyond this point no passage of gas is permitted until the valve I3 is operated and this is eilected at the discretion of the operator who may allow only small quantities at a time of the gas to pass into the vessel I by a rapid actuation and release of the lever I4. 'I'he pressure of the expanded gas in the vessel I then forces the solution up the tube 3 and into a passage 20 in the head where it is prevented from passing into a branch passage 2| communicating with the outlet tube 22 by the valve 23. This valve 23 is actuated in opposition to a spring 24, by a lever 25, the actuation of which raises the vvalve oi! its seating and allows the solution to pass into the outlet pipe 22 from which it issues in spray form through a nozzle 26.

The outlet pipe is detachablev and is made capable of rotation for the purpose of varying the direction of the spray.

It has already been proposed to provide a grooved screw-threaded member in the passage between the gas container and the solution container in atomisers for medicinal and dental purposes, means if desired being attached to the said screw-threaded member and extending through the said solution. container whereby the said member may be screwed inwardly to close the said groove. A

-What I claim is:

In spraying apparatus comprising a container for solution or the like, a head removably secured to the said container, a holder for a capsule containing a pressure medium and a nozzle both secured to said head, and a manually operable valve between the container yand the nozzle, the provision of an auxiliary manually operable valve allowing direct ow or pressure medium from the capsule to the container which is operable independently of the main valve by means of an actuating handle projecting through and carried by the head in ysuch position that the said actuating handle is capable of manipulation by a ilnger of the operator, a helical spring being arranged around the valve stem or the stuiiing box therefor, one end engaging the actuating handle and the other end engaging a stationary part, for example the head, of the apparatus for maintaining the valve closed and for returning it automatically to itsclosed position after operation.

WILLIAM BREWER.