US3305927A - Catch receptacle for evacuative suction apparatus - Google Patents

Catch receptacle for evacuative suction apparatus Download PDF

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Publication number
US3305927A
US3305927A US401138A US40113864A US3305927A US 3305927 A US3305927 A US 3305927A US 401138 A US401138 A US 401138A US 40113864 A US40113864 A US 40113864A US 3305927 A US3305927 A US 3305927A
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US
United States
Prior art keywords
housing
valve
evacuative
liquid
suction
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.)
Expired - Lifetime
Application number
US401138A
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English (en)
Inventor
Joseph K Mitchell
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.)
Vacudent Manufacturing Co
Original Assignee
Vacudent Manufacturing Co
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 Vacudent Manufacturing Co filed Critical Vacudent Manufacturing Co
Priority to US401138A priority Critical patent/US3305927A/en
Priority to DE19651503465 priority patent/DE1503465A1/de
Priority to FR23305A priority patent/FR1438121A/fr
Priority to SE12482/65A priority patent/SE315685B/xx
Application granted granted Critical
Publication of US3305927A publication Critical patent/US3305927A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C17/00—Devices for cleaning, polishing, rinsing or drying teeth, teeth cavities or prostheses; Saliva removers; Dental appliances for receiving spittle
    • A61C17/06—Saliva removers; Accessories therefor
    • A61C17/12—Control devices, e.g. for suction

Definitions

  • This invention relates to receptacles adapted to be interposed in suction lines to catch liquids and solids entrained in air being sucked through such lines.
  • catch receptacles make use of electrodes and electrical devices in circuit therewith for controlling operation of the motor-fan units employed to produce suction.
  • Other apparatus of the type concerned utilize catch receptacles employing floats and electrical control devices, see Winter US. Patent No. Re. 24,755 and Jones US. Patent No. 3,078,579.
  • the present invention constitutes an improvement on the catch receptacles of the latter type and has for its principal object to provide a receptacle in which suction applied thereto is positively cut-off when a predetermined level of liquid has been accumulated, the liquid then being automatically discharged, without the necessity for any electrical sensing or control means.
  • Another important object is to provide a catch receptacle that will operate to discharge liquid accumulated therein even though the source of suction continues to apply suction necessary for continued operation of additional catch receptacles or of other apparatus connected thereto.
  • An outstanding feature of the invention is the provision of a housing containing a liquid level responsive shut-off valve positioned in the evacuative air path and arranged to cut-off flow of the air through the housing when the level of liquid trapped therein reaches a predetermined height.
  • the shut-otf valve is advantageously positioned in a hollow, inverted, truncated cone, the flared upper end of which provides a low velocity zone in the evacuative air path and also forms a baffle between an inlet nozzle and a suction outlet.
  • the low velocity zone and the baflle both contribute to settlement of liquid and solids carried by the air stream into the housing, and insure that no liquid or solid materials are carried to the suction fan.
  • FIG. 1 is a side elevation of the catch receptacle of the invention
  • FIG. 2 a top plan view
  • FIG. 3 a top plan view with the lid removed
  • FIG. 4 a vertical section taken on the line 44 of FIG. 2;
  • FIG. 5 a vertical section taken on line 5-5 of FIG. 3.
  • the catch receptacle 10 includes an open topped housing 11 and a lid 12. Toggle type latches 13 are fixed to the side of housing 11; in their locked position they engage recesses 14 formed in a lid 12 to sealingly hold the lower edge 15 of lid 12 against the rim 16 of the housing.
  • An inlet nozzle 17 is carried by lid 12, being journaled therein for swiveling movement.
  • This nozzle includes a hose-receiving end 18 and an end 19 that depends from lid 12 downwardly into housing 11 when the lid is positioned on the housing.
  • a groove 20 surrounds end 19, and a drawstring 21 of a filter bag 22 of suitable porous material is tightly but releasably tied in the groove.
  • Air, liquid, and debris are sucked in through the free end of a flexible hose (not shown) connected to end 18 of nozzle 17, and are carried through nozzle 17 and into filter bag 22. Air, liquid, and any debris not retained by the filter bag pass into housing 11. From there, the air passes through a batfle 23 of inverted and truncated cone shape, through riser 23a supporting the bafile, and through an outlet hose 24 connected at the bottom of riser 23a to a source of suction, also not shown.
  • Baflle 23 is eccentrically mounted within housing 11 such that, when lid 12 is positioned on the housing, the end 19 of nozzle 17 is adjacent the baflle and extends slightly below its top rim 23b.
  • the off-center mounting of baffle 23 allows free travel of a float 25 within housing 11, as will be explained.
  • the air including its entrained liquid and any solids not retained by the bag, passes through filter bag 22 into housing 11, the increased size of the opening through which it passes, i.e. the interior of the housing, creates a low velocity zone in which the speed of travel of the air is decreased sufficiently to allow the moisture and any solid particles that may have passed through the filter bag to drop out from the air stream and settle at the bottom of the housing.
  • end 19 of nozzle 17 below rim 23b of baffle 23 also assists in settling the liquid and retained solids out of the air, since they impinge on the outwardly flared wall of the baflle, rather than being carried with the air up, over, and out through the bafile and outlet hose 24 into the source of suction, normally a motor-fan unit which can be severely damaged by moisture.
  • the inverted truncated cone shape of the baflle provides a gradual reduction in the size of the flow path for the cleansed air from the upper flared end of such baflle down to riser 23a and prevents a velocity increase at such flared end that would tend to draw into the baflle, with the air, as yet unsettled drops of liquid and solid particles.
  • weighted float 25 rides thereon and pivots arm 26 about pivot pin 27 as it rises, thereby lowering valve 28 and ultimately seating it over the air out-flow opening leading into riser 23a and from there into hose 24.
  • Arm 26 is pivotally connected to the float by a linkage arm 29 and to the valve by a linkage arm 30.
  • a slot 230 is provided in the side wall of baffle 23 to allow arm 26 to freely pivot, and pivot arm 26 is supported by post 23d extending upwardly from the bottom of the baflle.
  • Pivoted valve 31 normally closes a drain hose 32 con- 1 nected to a nipple 33 at the bottom of housing 11, but opens to allow free gravity flow of liquid through the drain hose to a waste system (not shown) when the 1 vacuum in the housing is broken.
  • the waste system can be specially designed, or existing systems can be employed. It is only necessary that the system allow gravity flow from the housing to waste.
  • Pivoted valve 31 is desirably constructed of rubber The resiliency of the valve normally holds it seated upwardly against nipple 33.
  • the Vacuum created in the housing assists in holding valve 31 closed, even when liquid has accumulated thereon.
  • valve 28 closing in response to suflicient raising of the liquid level, or due to a shut-down of the entire vacuum system, the weight of liquid acting on check valve 31 forces it to swing open so that the liquid can drain out.
  • the reset means consists of a member 34 having an enlarged portion 35 inside lid 12 of housing 11 and an enlarged head portion 36 outside.
  • Spring 37 surrounds a shank 38 that extends between enlarged portions 35 and 36 and is positioned between the lid and head portion 36 such that enlarged portion 35 is normally held against the lid.
  • a mounting bracket 40 is bolted to the housing with bolts 41. Holes 42 are provided through the bracket to receive additional bolts or screws for fastening the bracket in position.
  • a catch receptacle for use in evacuative suction apparatus comprising a housing;
  • a baflie surrounding the terminal end of said evacuative air flow conduit in the housing and being flared upwardly and outwardly therefrom;
  • a catch receptacle according to claim 1 further including a removable lid for the housing; and wherein the means for moving the valve from its position closing the evacuative air flow conduit comprises a plunger extending through the lid and adapted, when depressed, to contact the means interconnecting the valve and the float to thereby lower the float and raise the valve from the conduit; and
  • a catch receptacle according to claim 2, wherein the means closing the drain from the housing when a vacuum exists in the housing comprises a pivoted valve of resilient material that is self-biasing to drain closing position but that is movable to open position under the weight of liquid in the housing.

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  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Cleaning In General (AREA)
  • Jet Pumps And Other Pumps (AREA)
US401138A 1964-10-02 1964-10-02 Catch receptacle for evacuative suction apparatus Expired - Lifetime US3305927A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US401138A US3305927A (en) 1964-10-02 1964-10-02 Catch receptacle for evacuative suction apparatus
DE19651503465 DE1503465A1 (de) 1964-10-02 1965-07-01 Auffangbehaelter fuer Saugvorrichtungen
FR23305A FR1438121A (fr) 1964-10-02 1965-07-02 Récipient d'interception ou de retenue pour appareil d'aspiration et évacuation
SE12482/65A SE315685B (fr) 1964-10-02 1965-09-27

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US401138A US3305927A (en) 1964-10-02 1964-10-02 Catch receptacle for evacuative suction apparatus

Publications (1)

Publication Number Publication Date
US3305927A true US3305927A (en) 1967-02-28

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ID=23586464

Family Applications (1)

Application Number Title Priority Date Filing Date
US401138A Expired - Lifetime US3305927A (en) 1964-10-02 1964-10-02 Catch receptacle for evacuative suction apparatus

Country Status (4)

Country Link
US (1) US3305927A (fr)
DE (1) DE1503465A1 (fr)
FR (1) FR1438121A (fr)
SE (1) SE315685B (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3777403A (en) * 1972-09-18 1973-12-11 J Ritchie Dental silver retrieval apparatus
US3988134A (en) * 1974-01-28 1976-10-26 Gandrud Stanton D Dental office system
US4564374A (en) * 1977-03-25 1986-01-14 Durr-Dental Gmbh & Co. Kg Device for incorporation in dental suction apparatuses for separation of liquid and solid components
US4589442A (en) * 1983-10-10 1986-05-20 Sweden Recycling Ab Valve for suction installation
US5738519A (en) * 1995-03-21 1998-04-14 Tenniswood; James R. Dental suction device
US6638066B2 (en) * 2002-01-04 2003-10-28 Air Techniques, Inc. Dental vacuum system
US7947100B1 (en) 2009-12-15 2011-05-24 Gast Manufacturing, Inc. Combination vertical rotary vane suction pump and liquid separator

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1202971A (en) * 1915-12-27 1916-10-31 Charles P Daiber Alveolar-treatment apparatus.
US2274893A (en) * 1937-06-08 1942-03-03 Freedman Hyman Dental apparatus
US2821021A (en) * 1956-10-31 1958-01-28 Pelton & Crane Company Power-operated dental aspirator
US3051175A (en) * 1960-02-29 1962-08-28 Ritter Co Inc Dental waste disposal system
US3078579A (en) * 1960-10-28 1963-02-26 Pelton & Crane Company Dental aspirator with splash baffle
US3138973A (en) * 1962-04-02 1964-06-30 Mcculloch Corp Chain saw with sharpening means

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1202971A (en) * 1915-12-27 1916-10-31 Charles P Daiber Alveolar-treatment apparatus.
US2274893A (en) * 1937-06-08 1942-03-03 Freedman Hyman Dental apparatus
US2821021A (en) * 1956-10-31 1958-01-28 Pelton & Crane Company Power-operated dental aspirator
US3051175A (en) * 1960-02-29 1962-08-28 Ritter Co Inc Dental waste disposal system
US3078579A (en) * 1960-10-28 1963-02-26 Pelton & Crane Company Dental aspirator with splash baffle
US3138973A (en) * 1962-04-02 1964-06-30 Mcculloch Corp Chain saw with sharpening means

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3777403A (en) * 1972-09-18 1973-12-11 J Ritchie Dental silver retrieval apparatus
US3988134A (en) * 1974-01-28 1976-10-26 Gandrud Stanton D Dental office system
US4564374A (en) * 1977-03-25 1986-01-14 Durr-Dental Gmbh & Co. Kg Device for incorporation in dental suction apparatuses for separation of liquid and solid components
US4589442A (en) * 1983-10-10 1986-05-20 Sweden Recycling Ab Valve for suction installation
US5738519A (en) * 1995-03-21 1998-04-14 Tenniswood; James R. Dental suction device
US6638066B2 (en) * 2002-01-04 2003-10-28 Air Techniques, Inc. Dental vacuum system
US7947100B1 (en) 2009-12-15 2011-05-24 Gast Manufacturing, Inc. Combination vertical rotary vane suction pump and liquid separator
US20110143311A1 (en) * 2009-12-15 2011-06-16 Gast Manufacturing, Inc. Combination vertical rotary vane suction pump and liquid separator

Also Published As

Publication number Publication date
FR1438121A (fr) 1966-05-06
DE1503465A1 (de) 1970-07-30
SE315685B (fr) 1969-10-06

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