US3776107A - Diaphragm pump for a recirculating toilet - Google Patents

Diaphragm pump for a recirculating toilet Download PDF

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Publication number
US3776107A
US3776107A US00268928A US3776107DA US3776107A US 3776107 A US3776107 A US 3776107A US 00268928 A US00268928 A US 00268928A US 3776107D A US3776107D A US 3776107DA US 3776107 A US3776107 A US 3776107A
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US
United States
Prior art keywords
diaphragm
cover
fluid
pump
flange
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
US00268928A
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English (en)
Inventor
M Molus
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MAG Aerospace Industries LLC
Original Assignee
Monogram Industries Inc
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
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Application granted granted Critical
Publication of US3776107A publication Critical patent/US3776107A/en
Assigned to MAG AEROSPACE INDUSTRIES, INC., C/O VESTAR CAPITAL PARTNERS, INC. reassignment MAG AEROSPACE INDUSTRIES, INC., C/O VESTAR CAPITAL PARTNERS, INC. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: MONOGRAM INDUSTRIES, INC.
Anticipated expiration legal-status Critical
Assigned to HELLER FINANCIAL, INC. reassignment HELLER FINANCIAL, INC. SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MAG AEROSPACE INDUSTRIES, INC., A CORP. OF DE
Assigned to MAG AEROSPACE INDUSTRIES, INC. reassignment MAG AEROSPACE INDUSTRIES, INC. RELEASE AND REASSIGNMENT OF SECURITY INTEREST Assignors: HELLER FINANCIAL, INC.
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/0009—Special features
    • F04B43/0054—Special features particularities of the flexible members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B45/00—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids
    • F04B45/04—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids having plate-like flexible members, e.g. diaphragms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/10—Valves; Arrangement of valves
    • F04B53/1037—Flap valves
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S277/00—Seal for a joint or juncture
    • Y10S277/928—Seal including pressure relief or vent feature

Definitions

  • An improved pump filter for a recirculating toilet systern includes a one-piece elastomeric diaphragm that is retained by a cover plate which is captured by a yieldable clamping ring.
  • Normal pump operation is achieved through application of a pneumatic fluid such as compressed air.
  • a pneumatic fluid such as compressed air.
  • Potentially dangerous pressure excesses between the cover and the diaphragm can escape when the clamping ring holding forces are exceeded, and excess pressures tend to increase pressure to the O ring seal section thereby improving I the liquid seal while relieving the excess or overpressure as the cover plate clamping ring yields in the preferred direction.
  • a bead on the diaphragm periphery functions as an O-ring seal when the pump is mounted below the waste tank.
  • the present invention relatesto a recirculating:sanitary system, and, more particularly, to-an improved pneumatic filter pump for providing filteredflushing liquid, to a toilet.
  • azfilter and pump fora recirculating sanitary system was shown which was adapted to be placedzwholly within thestorage tank of the sanitary system and was, in the preferred'embodiment, operated by a pneumatic system. Because the filter pump was intended to operate immersed in the storagetank, the apparatus was enclosed in mating-members which were sealed ataperiphei'aI'flange; A diaphragm member was captured within .theflange and defined driving and driven portionsof the pump; Pneu matic fluid was applied to the driving-side of: the
  • the present invention concerns animproved'filter pump which, in the preferred embodiinentg, is also;
  • an improvedldiaphragm has beenable seal, which is held by a peripheral, resilient-clamp ing ring.
  • the holding ring has sufficient elasticity to permit an escape of'pneumatic fluid:- from between the diaphragm and the cover while still maintaining a fluid-tight seal between: the base' plate and the tank. Further, any leakage of flushing liquid from the pump would tend to be directed. into the tank since the peripheral bead of the diaphragm functions as A an o-ring seal.
  • An improved filter plateand comb conibinationis provided which is easily installed and removed from the base plate using a plastic, interrupted flat-washer,
  • FIG. 1 is a side view, partly in phantom-of a recirculating sanitary system incorporating an improved filter pump according to the present invention
  • FIG. 2. is a top view, partly broken away of anim? proved filter pump according to the present invention, taken-along line 22 of FIG. 1 in the direction of the appended arrows;
  • FIG. 3 is a side sectionalview of an improved filter pump ofFIG; 2 takenalong theline 3-3 in the directionof the appended'arrows; 7
  • FIG. 4. is .an enlarged side sectional view of the mounting flange shown in FIG. 3 and identified as Section4-4;
  • FIG. 5 is an enlarged sectional view of the retaining flange of FIG. 4 yielding to relieve excess pneumatic pressurewithin the pump of the present invention.
  • FIG. 1' there is shown a typical recircul'ating sanitary system '10, including a toilet 12, a tank 1'4, and a pump 16.
  • the pump 16 operates in response to applied pneumatic fluidsuch as compressed air in the preferred embodiment to pump filtered flushing liquid through the toilet. 12.
  • the toilet is provided with a decorative access coverfor a-drain valve 18 and further includes alid' 20 and a seat 22.
  • the pump 16 includes a flushing fluid outlet port 28 which connects to the flush line 24;
  • An-apertured filter plate 30 cooperates with a comb member having a plurality of pins 32', to permit flushing liquid topass fromthe tank 14 totheinterior of the pump 16.
  • the combinationof the pins 32 and their associated apertures in plate 30, provides arestricted annular orifice which effectively prevents solid or particulate matter from passing from the tank 14 to the pump 16.
  • a split washer member 34 similar to a circlip seats in a circumferential groove 36 to retain the filter plate 30 in place.
  • a pump base plate 38 holds the filter plate '30 and fits into an opening provided in the tank 14.
  • a peripheral flange 40 fits snugly within an opening provided in the bottom 42 of the tank 14.
  • a diaphragm member 44 is made of ian elastomeric material and is provided with a continuous peripheral head 46.
  • the diaphragm 44 is molded with a folded flange 48 at the periphery that encloses the'base plate member 38, best seen in FIGS. 3-5,.described below.
  • FIG. 3 the structural details-of the diaphragm pump 16 are shown more clearly.
  • the inner surface of the cover flange 54 is provided with a series of vestigial ribs 56 which help grip and hold the folded flange 48.
  • a peripheral ridge 58 cooperates with a flexible metallic holding ring 60 to maintain the cover 52 in a sealed relationship with the exterior of the tank 12, thus providing a fluid tight volume for driving the pump 16.
  • a heavy duty return spring 62 is provided to aid in the exhaust of the driving fluid and to provide an intake stroke for the pump operation when the flushing action is completed.
  • a rigid plastic spring support member 64 protects the diaphragm 44 from the return spring 62. The return spring 62 and spring support member 64 urge the diaphragm 44 to the full open position.
  • a unidirectional intake flow valve 66 and a unidirectional outlet flow valve 68 enable the driven side of the pump to fill during the intake stroke and to discharge the filtered flushing liquid into the flush outlet line 24 when driving fluid is applied to the volume between the diaphragm 44 and the pump cover 52.
  • the filter pins 32 are formed as an integral part of a filter comb assembly 70 which is mounted in a recess 72 that is provided in the base plate 38.
  • a stem element 74 includes a shoulder portion 76 which rests against an opening 78 in the filter recess 72.
  • the stem 74 extends into the driven chamber and contains a bias spring80 which holds the filter in a retracted position.
  • a reinforced strike plate 82 in the spring support member 64 moves the stem 74 and the comb assembly 76 when the driving fluid is applied to the pump and the support member 64 is driven toward the base plate 38.
  • the return spring 62 is positioned to surround the exterior of the filter recess 72.
  • the diaphragm 44 includes a thickness ring 84 which spaces the diaphragm 44 away from the inner wall of the pump cover 52.
  • the thickened ring 84 limits the travel of the bias spring 62.
  • An'altemative configuration of the diaphragm 44 in the driving stroke is indicated in the dashed. outline.
  • a driving fluid input line is provided but not shown.
  • the metallic holding ring 60 is fastened to a mounting ridge 86 with a plurality of screws 88 which, when secured, applies a compressive force to the cover flange 54.
  • the compressive force acts to create fluidtight seals on both the driving and driven sides of the pump.
  • pneumatic driving fluid under pressure is applied to the driving side of the pump.
  • the fluid applies a force to the diaphragm 44 which overcomes the resistive force of the return spring 62.
  • the diaphragm 44 moves upward, (as seen in FIG. 3) until the strike plate 82 engages the stem 74.
  • filtered flushing fluid is forced out through, the valve 68.
  • the stem 74 forces the filter comb assembly and the pins 32 through the apertures in the filter plate 30.
  • the return spring (62 urges the diaphragm downward (as viewed inF'lG. 3).
  • the bias spring retracts the filter comb assembly 70 as fluid is drawn into the driven side of the pump through the filter and the intake valve 66.
  • the rate at which the pump fills with filtered liquid is determined by the return spring 62 and by the rate at which the pressure is relieved.
  • FIG. 5 there is illustrated the manner in which the difierential in pressure as betweenthe interior of the driving side of the pump and ambient in excess of what might be considered a safe level is re-' lieved.
  • the excess pressure in the interior is vented to ambient while maintaining a fluid tight seal of the tank and its contents by applying a force against the metal holding ring 60.
  • the pneumatic fluid escapes between the folded flange 48 of the diaphragm 44 and the ribs 56 of the cover flange 54.
  • an improved, pneumatically operated recirculating toilet which includes a novel diaphragm member, that also functions as a sealing gasket. Further, the diaphragm is provided with a peripheral bead which functions as an O-ring seal.
  • a molded cover bears against the diaphragm and defines the driving side of the pump.
  • the cover is held in place by a flexible retaining ring, which is prestressed to maintain a fluid-tight seal between the cover and the diaphragm.
  • the retaining ring will, under such excess pressures, yield to permit the escape of pneumatic fluid between the cover and the diaphragm.
  • the pneumatic fluid acting upon the diaphragm, maintains a firm seal on the driven side of the pump and prevents the escape of any material from the driven side.
  • a diaphragm pump including:
  • a diaphragm member having an enlarged neck portion adjacent the periphery, said neck portion being adapted to receive a plate member
  • a cover portion including a flange adapted to seat against said neck portion and plate member, capturing a part of said neck portion therebetween to produce a fluid-tight seal
  • a flexible retainer ring member mounted adjacent said cover portion and prestremed to apply a seating force on said flange, said cover portion and ring member responding to driving fluid pressures between said cover portion and said diaphragm member that are greater by a predetermined amount than said seating force, to unseat said cover portion for relieving excess driving fluid pressures.
  • diaphragm pump of claim 1 wherein said diaphragm member has a bead at the peripheral edge thereof and said bead is adapted to function as an O-ring when said cover is seated.
  • a diaphragm pump adapted to be her and said diaphragm member; and mounted in fluid communication with the Storage tank d.
  • flexible retainer ring means mounted to the storage comprising, in combination: tank, including a ring member adapted to fitover a. a diaphragm member having a peripheral edge and 5 Said cover member flange, Said ring member being an elongated, fluid-receiving interior portion and an enlarged neck portion adjacent said peripheral edge;
  • a filterplate member adapted to be inserted into said enlarged neck portion to provide, in combina- 10 tion with said diaphragm member, upper and lower sealing surfaces, said filter plate member including whereby excesslve dflvmg u d pressure canovermeans for filtering the contents of said storage tank come the force of Said ring member to Permit to id fl hi fl id; driving fluid leakage between said diaphragm
  • a cover member having a peripheral flange 5 member and said cover member.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
US00268928A 1972-07-03 1972-07-03 Diaphragm pump for a recirculating toilet Expired - Lifetime US3776107A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US26892872A 1972-07-03 1972-07-03

Publications (1)

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US3776107A true US3776107A (en) 1973-12-04

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Family Applications (1)

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US00268928A Expired - Lifetime US3776107A (en) 1972-07-03 1972-07-03 Diaphragm pump for a recirculating toilet

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US (1) US3776107A (es)
AR (1) AR199291A1 (es)
BR (1) BR7207914D0 (es)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4124334A (en) * 1976-12-30 1978-11-07 Mazzetti Flavio J Diaphragm pump
EP0036886A4 (en) * 1979-10-01 1982-01-08 Acf Ind Inc BREAK-PROOF FUEL PUMP.
EP0036428A4 (en) * 1979-10-01 1982-01-08 Acf Ind Inc FUEL PUMP.
US4436310A (en) 1981-09-18 1984-03-13 Toyota Jidosha Kogyo Kabushiki Kaisha Sealing device for joint
US5538478A (en) * 1994-04-01 1996-07-23 Tsubakimoto Chain Co. Preventive structure for preventing extraordinary deformation of a diaphragm of an oil hermetic type tensioner
EP0846007A4 (en) * 1995-08-03 1999-10-27 Medela Inc DIAPHRAGM PUMP AND PUMP MOUNTED IN A CARRYING CASE FOR BREAST MILK EXTRACTION
US5988652A (en) * 1995-11-21 1999-11-23 Robertshaw Controls Company Fluid control assembly
US20090236805A1 (en) * 2008-03-21 2009-09-24 Rubber Fab Gasket And Molding, Inc.. Gauge guard for sanitary piping system
US10578098B2 (en) 2005-07-13 2020-03-03 Baxter International Inc. Medical fluid delivery device actuated via motive fluid
US10619633B2 (en) * 2013-12-19 2020-04-14 Other Lab Llc Diaphragm compressor system and method
US11478578B2 (en) 2012-06-08 2022-10-25 Fresenius Medical Care Holdings, Inc. Medical fluid cassettes and related systems and methods

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2526331A (en) * 1945-06-27 1950-10-17 Bruce G Copping Apparatus for proportioning a measured amount of sirup and carbonated water for beverage dispensers
US2970747A (en) * 1958-09-09 1961-02-07 Itt Compressor system
US3262706A (en) * 1962-07-30 1966-07-26 Chrysler Corp Ball joint seal
US3491379A (en) * 1968-01-04 1970-01-27 Dennis Parrish Cleaning apparatus for water closets and the like
US3634891A (en) * 1970-08-19 1972-01-18 Monogram Ind Inc Self-contained recirculating sanitary system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2526331A (en) * 1945-06-27 1950-10-17 Bruce G Copping Apparatus for proportioning a measured amount of sirup and carbonated water for beverage dispensers
US2970747A (en) * 1958-09-09 1961-02-07 Itt Compressor system
US3262706A (en) * 1962-07-30 1966-07-26 Chrysler Corp Ball joint seal
US3491379A (en) * 1968-01-04 1970-01-27 Dennis Parrish Cleaning apparatus for water closets and the like
US3634891A (en) * 1970-08-19 1972-01-18 Monogram Ind Inc Self-contained recirculating sanitary system

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4124334A (en) * 1976-12-30 1978-11-07 Mazzetti Flavio J Diaphragm pump
EP0036886A4 (en) * 1979-10-01 1982-01-08 Acf Ind Inc BREAK-PROOF FUEL PUMP.
EP0036428A4 (en) * 1979-10-01 1982-01-08 Acf Ind Inc FUEL PUMP.
US4436310A (en) 1981-09-18 1984-03-13 Toyota Jidosha Kogyo Kabushiki Kaisha Sealing device for joint
US5538478A (en) * 1994-04-01 1996-07-23 Tsubakimoto Chain Co. Preventive structure for preventing extraordinary deformation of a diaphragm of an oil hermetic type tensioner
EP0846007A4 (en) * 1995-08-03 1999-10-27 Medela Inc DIAPHRAGM PUMP AND PUMP MOUNTED IN A CARRYING CASE FOR BREAST MILK EXTRACTION
US5988652A (en) * 1995-11-21 1999-11-23 Robertshaw Controls Company Fluid control assembly
US10578098B2 (en) 2005-07-13 2020-03-03 Baxter International Inc. Medical fluid delivery device actuated via motive fluid
US10590924B2 (en) 2005-07-13 2020-03-17 Baxter International Inc. Medical fluid pumping system including pump and machine chassis mounting regime
US10670005B2 (en) 2005-07-13 2020-06-02 Baxter International Inc. Diaphragm pumps and pumping systems
US11384748B2 (en) 2005-07-13 2022-07-12 Baxter International Inc. Blood treatment system having pulsatile blood intake
US12392335B2 (en) 2005-07-13 2025-08-19 Baxter International Inc. Medical fluid pumping system having backflow prevention
US20090236805A1 (en) * 2008-03-21 2009-09-24 Rubber Fab Gasket And Molding, Inc.. Gauge guard for sanitary piping system
US11478578B2 (en) 2012-06-08 2022-10-25 Fresenius Medical Care Holdings, Inc. Medical fluid cassettes and related systems and methods
US10619633B2 (en) * 2013-12-19 2020-04-14 Other Lab Llc Diaphragm compressor system and method

Also Published As

Publication number Publication date
BR7207914D0 (pt) 1974-09-05
AR199291A1 (es) 1974-08-23

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AS Assignment

Owner name: MAG AEROSPACE INDUSTRIES, INC., C/O VESTAR CAPITAL

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:MONOGRAM INDUSTRIES, INC.;REEL/FRAME:005152/0265

Effective date: 19890718

AS Assignment

Owner name: HELLER FINANCIAL, INC.

Free format text: SECURITY INTEREST;ASSIGNOR:MAG AEROSPACE INDUSTRIES, INC., A CORP. OF DE;REEL/FRAME:006198/0529

Effective date: 19920626

AS Assignment

Owner name: MAG AEROSPACE INDUSTRIES, INC., CALIFORNIA

Free format text: RELEASE AND REASSIGNMENT OF SECURITY INTEREST;ASSIGNOR:HELLER FINANCIAL, INC.;REEL/FRAME:008354/0071

Effective date: 19961202