EP0083614A1 - Appareil de propulsion d'un milieu abrasif - Google Patents

Appareil de propulsion d'un milieu abrasif

Info

Publication number
EP0083614A1
EP0083614A1 EP19820902084 EP82902084A EP0083614A1 EP 0083614 A1 EP0083614 A1 EP 0083614A1 EP 19820902084 EP19820902084 EP 19820902084 EP 82902084 A EP82902084 A EP 82902084A EP 0083614 A1 EP0083614 A1 EP 0083614A1
Authority
EP
European Patent Office
Prior art keywords
cavity
outlet
medium
abrasive medium
propellant
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP19820902084
Other languages
German (de)
English (en)
Inventor
Paul Edgar
Dan Taylor
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IMPACT TECHNIQUES (IRONVILLE) Ltd
Original Assignee
IMPACT TECHNIQUES (IRONVILLE) Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by IMPACT TECHNIQUES (IRONVILLE) Ltd filed Critical IMPACT TECHNIQUES (IRONVILLE) Ltd
Publication of EP0083614A1 publication Critical patent/EP0083614A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/14—Containers for dispensing liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant
    • B65D83/60—Containers for dispensing liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant with contents and propellant separated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C5/00—Devices or accessories for generating abrasive blasts
    • B24C5/02—Blast guns, e.g. for generating high velocity abrasive fluid jets for cutting materials

Definitions

  • This invention relates to apparatus for propelling a medium, especially an abrasive medium and in particular is concerned with hand held apparatus operable by pressure.
  • apparatus for propelling an abrasive medium said apparatus having a first cavity for retaining a self-contained supply of the abrasive medium, and a second cavity for retaining a self-contained propellant medium, arid outlet means which comprises an abrasion resistant material and through which abrasive medium can be expelled from the apparatus, means being provided to enable the abrasive medium to be propelled through the outlet means by virtue of a manually applied pressure.
  • the apparatus includes an outlet for said first cavity and an outlet for said second cavity the first and second cavity outlets connecting with one another whereby, when the second cavity outlet is open, the propellant medium can pass therethrough and cause abrasive medium to flow through said first cavity outlet and be dispensed through the outlet means.
  • the apparatus includes an outlet for said first cavity and an outlet for said second cavity, said first cavity including means enabling mixing of the abrasive medium with the propellant medium when the latter flows through the second cavity outlet, whereby the mixture flows through said first cavity outlet to the outlet means.
  • the second cavity outlet includes a valve for controlling passage of the propellant medium from the second ccvity, whereby there is no passage cf abrasive medium through the control valve.
  • the outlet means nay be provided with a venturi and may be formed of a base material which is chromium plated so as to be abrasion resistant.
  • the base material may be a hard plastics material such as nylon.
  • the second cavity outlet may comprise a tubular component which enters the second cavity at a location so designed that in any disposition of the apparatus, propellant medium in c liquid form will not enter the tubular component.
  • FIG. 1 is a vertical cross-section through a first embodiment of an apparatus according to the invention.
  • Fig. 2 is a vertical cross-section through a second embodiment of an apparatus according to the invention.
  • an apparatus in the form of an aerosol comprises a container 10, preferably cylindrical, having a concave lower end cap 12 and an upper end cap 14, an outer edge of the latter being crimped onto the container 10 and an inner edge defining a central aperture.
  • an arrangement comprising an inner container 16 preferably formed of a hard plastics material and defining a cavity 16a.
  • the container 16 terminates short of the lower end cap 12 and is closed at its lower end by a plug 13.
  • the cavity 10a surrounding the container 16 contains a liquid propellant medium as hereinafter described.
  • the container 10 is crimped together with a cover plate 20 onto the end cap 14.
  • a first tube 22 Slidably mounted on the cover plate 20 to extend therethrough is a first tube 22 extending within the container 16 close to the lower end thereof, and at its upper end communicating with an outlet device or nozzle 24 for the aerosol.
  • a further tube 26 extends through the cover plate 20 and has its upper end located in a valve 28, the latter also communicating with the nozzle 24.
  • the tube 26 is bent at its lower end to extend through the wall of the inner container 16 and communicate with the cavity of the container 10. The position of the lower end of the tirbe 26 is carefully chosen as hereinafter described.
  • the nozzle 24 at the outlet end thereof, downstream of the locations of communication with the tube 22 and the valve 23, is provided with, in the direction of flow, respective convergent and divergent parts forming a venturi.
  • a cap 30 is mounted on the upper end of the nozzle 24 whereby when pressure is manually applied to the cap 30, the nozzle 24 is moved downwardly with the tube 22, and simultaneously opens the valve 23, allowing communication between the cavity of the container 10 and the atmosphere.
  • a one-way aperture 32 is provided in the cover plate 20 to provide communication between the atmosphere and the cavity of the inner container 16.
  • the nozzle 24 is preferably formed of a hard plastics material such as nylon and, at least over the venturi section, is preferably chromium plated to provide an abrasion resistant lining.
  • the tube 22 may also be abrasion resistant if necessary.
  • a liquid propellant medium is introduced to the cavity of the container 10 to a level A.
  • the medium is such as to produce a vapour which is contained within the remainder of the cavity of the container 10.
  • the tube 26 has its lower end in communication with that part of the cavity of the container 10 containing the propellant vapour but, with the valve 28 closed, the vapour cannot pass to the nozzle 24.
  • the inner container 16 is filled with an abrasive medium such as sand or shot, different grades of which are washed and sieved prior to being introduced into the container 16.
  • the nozzle 24 with the valve 28 is biased to the closed position.
  • the propellant vapour passes to the nozzle 24 and creates a reduction in pressure as it passes the upper end of the tube 22, whereby to draw the abrasive medium through the tube 22 and propel the abrasive medium through the nozzle 24.
  • the valve 28 is subjected only to the passage of the vapour or, in an extreme condition, the propellant liquid, and is not therefore choked or fouled in any way by the passage of particulate material therethrough.
  • the aerosol does not have to dispense its total content at any one time, because the valve can be re-closed.
  • the tube 26 is so arranged that with the apparatus, in the horizontal position or in an inverted position, the amount of propellant liquid is such that it will still not reach the end of the tube 26 and pass therethrough.
  • the inner container 16 has a partition 34 extending thereacross towards the lower end, so as to define a chamber 36 between the partition 34 and the lower end cap 18.
  • the partition 34 has a pressure operated one-way valve 38 formed to be abrasion resistant, enabling communication between the cavity of the inner container 16 and the chamber 36.
  • An outlet tube 22a communicates at its upper end with an outlet device or nozzle 24a and extends through the inner container 16 to open at its lower end at the partition 34 into the chamber 36.
  • the valve 28 communicates between the tube 26 and a further tube 40 which extends back through the cover plate 20 and through the inner container 16, and opens through the partition 34 into the chamber 36.
  • the valve 28 In use, when the valve 28 opens, the propellant vapour passes through the tube 40 into the chamber 36 where the vapour entrains the abrasive medium and moves the abrasive medium through the tube 22a so as to propel the abrasive medium through the nozzle 24a.
  • the valve 28 is subjected only to the propellant vapour, or the liquid in an extreme condition, and is therefore not fouled by the passage of any pcrticulate material therethrough. It is to be appreciated that where an aerosol is to be used with very light duty abrasive medium, it may be convenient to provide an apparatus where the abrasive medium is mixed with a liquid propellant medium and/or transmitted through the control valve.
  • the aerosol is not restricted in use to abrasive medium but can advcntageously be used with other particulate material, for example powders, particularly where it is preferred that the material does not pass through the control valve.
  • the apparatus is designed to be hand held and effectively provides a mobile and easily used abrasive blasting device which has many advantageous uses.
  • the aerosol when filled with sand, can be used to etch security marks on car windows and the like and can also be used for cleaning of printed circuit boards.
  • the aerosol can be used to remove rust marks in any equipment.
  • the aerosol may be filled with cut wire shot and this is particularly suitable in peening of unaccessible areas of different forms of equipment.
  • venturi section of the nozzle may be adjustably position relative to the remaining section of the nozzle.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Nozzles (AREA)

Abstract

Un appareil de propulsion d'un milieu abrasif comprend un conteneur (10) qui peut être tenu dans la main et ayant un conteneur interne (16) définissant une cavité (16a) pour une alimentation autonome du milieu abrasif et une cavité (10a) pour un milieu propulseur autonome. La cavité (10a) communique avec une buse résistant à l'abrasion (24) munie d'un venturi au travers d'une vanne de commande (28), et la cavité (16a) communique également avec la buse (24). Une pression sur le couvercle (30) ouvre la soupape (28) et le passage du milieu propulseur provoque l'aspiration du milieu abrasif vers la buse (24). En conséquence, le milieu abrasif n'est pas en contact avec la soupape (28).
EP19820902084 1981-07-22 1982-07-20 Appareil de propulsion d'un milieu abrasif Withdrawn EP0083614A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB8122549 1981-07-22
GB8122549 1981-07-22
GB8200081 1982-01-04
GB8200081 1988-01-05

Publications (1)

Publication Number Publication Date
EP0083614A1 true EP0083614A1 (fr) 1983-07-20

Family

ID=26280204

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820902084 Withdrawn EP0083614A1 (fr) 1981-07-22 1982-07-20 Appareil de propulsion d'un milieu abrasif

Country Status (3)

Country Link
EP (1) EP0083614A1 (fr)
AU (1) AU8686182A (fr)
WO (1) WO1983000315A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19851385B4 (de) * 1998-11-07 2006-07-06 Emt Werkzeug- Und Formenbau Gmbh Sprüh- oder Spritzvorrichtung für in drucklosen Wegwerfdosen enthaltene Flüssigkeiten

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2725684A (en) * 1955-01-27 1955-12-06 Dalton L Crowe Portable sand blaster
CH397320A (de) * 1962-05-22 1965-08-15 Aerosol Service Ag Puderzerstäuber
FR1336229A (fr) * 1962-07-16 1963-08-30 Distributeur de produit émulsionné
US3289949A (en) * 1964-07-09 1966-12-06 Geigy Chem Corp Pushbutton dispenser for products in the fluid state
FR1585898A (fr) * 1968-03-29 1970-02-06
FR2011653A1 (en) * 1968-06-25 1970-03-06 Norton Co Nozzle for sand or ejection of grinding - material
US3704811A (en) * 1970-07-24 1972-12-05 Creative Ideas Inc Portable sandblaster
DE2754587A1 (de) * 1977-12-08 1979-06-13 Helmut Espeter Spraydosenventil

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8300315A1 *

Also Published As

Publication number Publication date
AU8686182A (en) 1983-03-17
WO1983000315A1 (fr) 1983-02-03

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE FR LI LU NL SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19831005

RIN1 Information on inventor provided before grant (corrected)

Inventor name: EDGAR, PAUL

Inventor name: TAYLOR, DAN