US3820754A - Hydraulic flush tank with improved seating and resealing means - Google Patents

Hydraulic flush tank with improved seating and resealing means Download PDF

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Publication number
US3820754A
US3820754A US00281348A US28134872A US3820754A US 3820754 A US3820754 A US 3820754A US 00281348 A US00281348 A US 00281348A US 28134872 A US28134872 A US 28134872A US 3820754 A US3820754 A US 3820754A
Authority
US
United States
Prior art keywords
plug
tank
cylinder
valve
liquid
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
US00281348A
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English (en)
Inventor
R Caron
T Howard
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.)
WATER CONTROL PRODUCTS Inc A CORP OF
WATER CONTROL PROD INC US
WATER CONTROL PRODUCTS
Original Assignee
WATER CONTROL PRODUCTS
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 WATER CONTROL PRODUCTS filed Critical WATER CONTROL PRODUCTS
Priority to US00281348A priority Critical patent/US3820754A/en
Priority to CA177,806A priority patent/CA1009801A/en
Priority to AU58878/73A priority patent/AU482613B2/en
Priority to DE19732340449 priority patent/DE2340449A1/de
Priority to NL7311008A priority patent/NL7311008A/xx
Priority to IT52006/73A priority patent/IT990363B/it
Priority to SE7311171A priority patent/SE390429B/sv
Priority to BE134618A priority patent/BE803655A/xx
Priority to BR6321/73A priority patent/BR7306321D0/pt
Priority to GB3871073A priority patent/GB1446722A/en
Priority to FR7329864A priority patent/FR2196424B1/fr
Application granted granted Critical
Publication of US3820754A publication Critical patent/US3820754A/en
Assigned to WATER CONTROL PRODUCTS, INC., A CORP. OF DE reassignment WATER CONTROL PRODUCTS, INC., A CORP. OF DE ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: CITIZENS NATIONAL BANK OF CHEBOYGAN
Assigned to MOLMEC, INC. reassignment MOLMEC, INC. MORTGAGE (SEE DOCUMENT FOR DETAILS). Assignors: WATER CONTROL PRODUCTS, INC., A CORP. OF DE
Assigned to WATER CONTROL PRODUCTS, INC., A DE CORP reassignment WATER CONTROL PRODUCTS, INC., A DE CORP ASSIGNMENT OF ASSIGNORS INTEREST. RELEASE OF SECURITY INTEREST IN SAID PATENTS RECORDED AT REEL 3915 FRAMES 843-846. Assignors: MOLMEC, INC.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E03WATER SUPPLY; SEWERAGE
    • E03DWATER-CLOSETS OR URINALS WITH FLUSHING DEVICES; FLUSHING VALVES THEREFOR
    • E03D3/00Flushing devices operated by pressure of the water supply system flushing valves not connected to the water-supply main, also if air is blown in the water seal for a quick flushing
    • E03D3/10Flushing devices with pressure-operated reservoir, e.g. air chamber

Definitions

  • the plug is capable of being seated within the outlet of the tank and has an aperture therein into which the valve is slidably received.
  • the valve is attached to a stem which is constantly urged upwardly by the action of a spring.
  • the valve is pushed downward from a seated position in the plug against the action of the spring when the tank is flushed. This downward movement of the valve opens the aperture in the plug in which the valve was seated which decreases the pressure within the cylinder above the plug and causes the plug to move upwardly from its seated position in the tank outlet thus opening the outlet for the passage of water from the tank during the flushing cycle.
  • the plug drops.
  • the spring action of the valve tends to prevent the plug from seating thus allowing some liquid to flow through the outlet as the tank is being filled.
  • the plug responds to pressure created by liquid coming into the tank by moving slowly in opposition to the force of the spring and valve until the plug is seated and the tank is resealed.
  • the field of the present invention is liquid flushing assemblies.
  • the present invention more particularly, relates to a small compact water flushing assembly for rapidly discharging a quantity of water as a slug of water under pressure.
  • One type of device which enables efficient flushing with a fraction of the amount of water utilized by conventional gravity type toilets is a hydraulic toilet flushing device
  • Hydraulic toilet flushing devices are very effective in that they can be flushed with a relatively small volume of water and have performance characteristics which are competitive with conventional gravity type toilets. Indeed, such devices are a significant breakthrough in the water closet art.
  • the present invention is directed to a new and improved seating and resealing means for use in hydraulic toilet flushing devices.
  • the present invention is a new hydraulic flush tank with an improved seating and resealing device.
  • the flush tank operates by pushing a button in a downward direction.
  • the device includes the combination of a sealing plug and a spring loaded valve slidably received within an aperture in the plug.
  • the valve is connected to a button outside of the tank. When the button is pushed downwardly, the valve leaves its seated position in the plug thus opening the plug. When the plug is open, the pressure above the plug decreases which causes the plug to rise and expose the outlet in the tank.
  • the spring tends to prevent the plug from seating after the tank has been flushed thus allowing some liquid to flow through the outlet as the tank is being filled. This flow of liquid is used to reseal the bowl.
  • the plug is also designed to respond to the increasing pressure created by incoming liquid after the tank is flushed, Thus, as the tank is filling, the plug opposes the action of the spring loaded valve. Such opposition continues until the plug is seated.
  • Another object of the invention is the provision of a cylinder associated with a hermetically sealed tank for holding an amount of liquid and compressed air, an outlet from the tank through the cylinder and a normally closed plug in the outlet which can be lifted by the action of a button.
  • a further object of the invention is to provide a hydraulic toilet which can be flushed by pressing a button.
  • FIG. 3 is a view similar to FIG. 2, but showing the orientation of the various components of the seating and resealing means at a different time during the flush cycle;
  • FIG. 4 is a view similar to FIG. 2, but showing the orientation of the various components of the seating and resealing means at a point in time during the reseal cycle;
  • FIG. 5 is a view similar to FIG. 2, but showing the tank in a sealed and seated position ready for the commencement of the flush cycle.
  • the present invention relates in general to liquid flushing devices and more particularly to hydraulic toi lets.
  • a hermetically sealed container or tank 10 is shown secured on a bowl 12 with a filler tube 14 connected through the bottom portion of the tank 10. It is to be noted that the tank 10 of the present invention is mounted in association with a toilet bowl 12. The tank 10 of the present invention, however, may be adapted to be mounted within a conventional toilet tank as a replacement for conventional flushing equipment.
  • a check valve assembly 16 is connected between the filler tube 14 and a conduit 18.
  • Conduit 18 is connected to a source of pressurized water, such as a typical source of city water with an average pressure which, in most cases, is in the order of thirty pounds per square inch or higher.
  • Tank 10 may be equipped with an air vent tube with a seat in the bottom thereof with a check ball loosely retained in the lower end portion of the tube by a pin. Since the details of such an air vent tube are well known in this art, they are not shown in the drawing. Furthermore, as is explained below, the components within a cylinder 38 may function as a vacuum breaker in which case an air 'vent tube is unnecessary.
  • a cylinder 38 As is also shown in FIG. 2, the upper end of a cylinder 38 is vertically secured and sealed through tank 10 by means of threads 40. The lower end portion or output end portion of the cylinder 38 is also sealed into tank 10.
  • the improved seating and resealing means of the present invention is contained within cylinder 38 and includes a plug 42 which is slidable within said cylinder.
  • a seat 45 is formed on the bottom portion of cylinder 38.
  • Plug 42 forms a hermetical seal with seat 45 when plug 42 is in the seated position.
  • the plug 42 has a central axial bore 44 at its upper end for slidably receiving a valve stem 46.
  • Also formed in plug 42 are bores 47 which communicate with a chamber 49 in plug 42.
  • ports 50 Formed in the lower section of cylinder 38 are ports 50 which allow liquid contained in tank 10 to flow into cylinder 38 and through opening 51 in the bottom thereof when plug 42 is in an upper position. It should be noted that prior to commencement of the flushing cycle, plug 42 rests on a tapered shoulder or stop which forms the seat 45 on cylinder 38 (see FIG. 5).
  • valve stem 46 On the bottom end of valve stem 46 is a fill valve 56 which is seatable in a fill valve seat 58 formed in plug 42.
  • An O-ring 60 fitted on fill valve 56, provides a seal to prevent the passage of fluid through plug 42 when fill valve 56 is in the seated position.
  • Diaphragm 61 is rigidly secured to valve stem 46 so that vertical movement of valve stem 46 causes vertical movement of diaphragm 61 and vice versa. Diaphragm 61 is slidably sealed to the cylinder 38 by a flexible rubber gasket 64.
  • Diaphragm 61 is hermetically sealed to gasket 64 which is hermetically sealed to cylinder 38 to form a hermetically sealed chamber 66.
  • diaphragm 61 may have the configuration of a cap or plate The function of diaphragm 61, however, may be accomplished by a piston. In this regard, it should be noted that the function of diaphragm 61 is to form a fluid-tight movable ceiling on chamber 66.
  • a coil compression spring 48 is positioned within cylinder 38 so as to normally urge fill valve 56 in an upward direction.
  • Coil compression spring 48 is positioned in the upper end of cylinder 38 about the valve stem 46 and is coaxial with it.
  • the function of spring 48 is to prevent plug 42 from seating after the tank has been flushed.
  • Spring 48 by preventing plug 42 from seating immediately after the tank has been flushed, allows water to pass through the tank outlet to reseal the bowl. A more detailed explanation of this function of spring 48 appears below.
  • the force exerted by coil spring 48 is adjustable.
  • the adjusting means includes a member 65 having screwed threads 67 which are engaged with the screw threads 69 on stem 46. Screw threads 67 and 69 enable member 65 to be turned and thus raise or lower member 65 to adjust the upward force exerted by spring member 48 with respect to stem 46. It should be noted that member 65 is inclusive of a stop or shoulder 73 for engaging and translating the upward force exerted by the upper end of spring 48.
  • cylinder 38 Formed within cylinder 38 is a cylinder 71 for housing spring 48 and providing a fixed stop to enable spring 48 to urge upwardly against shoulder 73.
  • valve stem 46 which protrudes through tank l has a push button 70 affixed thereto.
  • tank may also include an air vent tube.
  • the purpose of the air vent tube is to allow air into the tank, when required, and shut off the supply of air, at the appropriate time during the filling cycle, to permit liquid entering the tank to compress against air within the tank.
  • the air vent tube also serves as a vacuum breaker to prevent liquid in bowl 12 from backing up into the tank when the tank is opened during the flush cycle.
  • an air vent tube is advantageously accomplished by a fluid passageway within valve stem 46.
  • fill valve 56 tends tocarry plug 42 upwardly due to the upward biasing action of spring 48.
  • the action of spring 48 prevents plug 42 from fully seating on valve seat 45. Because plug 42 is not fully seated on seat 45, some of the liquid entering the tank, after the tank has been flushed, passes through ports 50 and out of the tank through outlet 51 on the bottom of cylinder 38. This passage of water through outlet 51 is desirable since it refills and reseals the bowl 12 after the bowl has been flushed. Some of the liquid entering the tank, however, will pass between rims 96 and the inner walls of cylinder 38 and enter chamber 66. This action will cause pressure to build up within chamber 66.
  • an optional spring 112 may be included within chamber 66 toassist in seating plug 42. When included in cylinder 38, spring 112 exerts a downward force on plug 42 which is less than the upward force exerted by spring 48 against fill valve 46.
  • filler tube 14 is connected to a source of water.
  • check valve assembly 16 open to permit the water to flow through tube 14 into tank 10
  • water rising in the tank will hermetically seal the tank which will continue to fill with water against the compression of air above the water and thus establish the equilibrium condition as represented by FIG. 5 of the drawing.
  • An assembly for filling and discharging a liquid from a hermetically sealed tank of the type which includes a liquid inlet in fluid communication with the tank for introducing a liquid under pressure into the tank comprising a. a cylinder in fluid communication with the tank having an outlet in the lower portion thereof with an aperture in said cylinder to provide a passagesaid plug to stop fluid flow through the plug, said valve permitting the pressure within said cylinder to be decreased when said plug is seated in said seat in said cylinder and said valve is moved to a position where said upper opening is open by allowing fluid within the cylinder to flow through the plug and out the outlet,
  • force means tending to seat said valve in said upper opening in said plug to allow pressure to increase within the tank when the tank is being filled with a liquid and to prevent liquid :in the tank from passing through said plug when said plug is seated in said seat in said cylinder,
  • a pressure responsive diaphragm secured to said valve and movably sealed to said cylinder to form a fluid tight ceiling over that portion of liquid in the tank that is in said cylinder, said pressure responsive diaphragm enabling pressure to be exerted on said plug as liquid enters the: tank which pressure enables said plug to seat in said outlet against the force exerted by said force means as the tank is being filled witha liquid, and

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Self-Closing Valves And Venting Or Aerating Valves (AREA)
  • Sanitary Device For Flush Toilet (AREA)
  • Safety Valves (AREA)
US00281348A 1972-08-17 1972-08-17 Hydraulic flush tank with improved seating and resealing means Expired - Lifetime US3820754A (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
US00281348A US3820754A (en) 1972-08-17 1972-08-17 Hydraulic flush tank with improved seating and resealing means
CA177,806A CA1009801A (en) 1972-08-17 1973-07-31 Hydraulic flush tank with improved seating and resealing means
AU58878/73A AU482613B2 (en) 1972-08-17 1973-08-03 Hydraulic flush tank with improved seating and resealing means
DE19732340449 DE2340449A1 (de) 1972-08-17 1973-08-09 Hydraulischer spueltank mit einer verbesserten aufsetz- und wiederabdichteinrichtung
NL7311008A NL7311008A (sv) 1972-08-17 1973-08-09
IT52006/73A IT990363B (it) 1972-08-17 1973-08-13 Perfezionamento nei dispositivi di cacciata per servizi igienico sanitari
SE7311171A SE390429B (sv) 1972-08-17 1973-08-16 Hydraulsystem
BE134618A BE803655A (fr) 1972-08-17 1973-08-16 Chasse d'eau
BR6321/73A BR7306321D0 (pt) 1972-08-17 1973-08-16 Quantidade predeterminada de liquido aperfeicoado conjunto para encher um tanque selado com um
GB3871073A GB1446722A (en) 1972-08-17 1973-08-16 Flushing assemblies
FR7329864A FR2196424B1 (sv) 1972-08-17 1973-08-16

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00281348A US3820754A (en) 1972-08-17 1972-08-17 Hydraulic flush tank with improved seating and resealing means

Publications (1)

Publication Number Publication Date
US3820754A true US3820754A (en) 1974-06-28

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Family Applications (1)

Application Number Title Priority Date Filing Date
US00281348A Expired - Lifetime US3820754A (en) 1972-08-17 1972-08-17 Hydraulic flush tank with improved seating and resealing means

Country Status (10)

Country Link
US (1) US3820754A (sv)
BE (1) BE803655A (sv)
BR (1) BR7306321D0 (sv)
CA (1) CA1009801A (sv)
DE (1) DE2340449A1 (sv)
FR (1) FR2196424B1 (sv)
GB (1) GB1446722A (sv)
IT (1) IT990363B (sv)
NL (1) NL7311008A (sv)
SE (1) SE390429B (sv)

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4176821A (en) * 1976-03-05 1979-12-04 Georg Rost & Sohne Pilot-operated valve assembly
US4233698A (en) * 1977-01-28 1980-11-18 Water Control Products/N.A., Inc. Pressure flush tank for toilets
US4955921A (en) * 1989-11-30 1990-09-11 American Standard Inc. Flushing mechanism using phase change fluid
US4984311A (en) * 1989-11-30 1991-01-15 American Standard Inc. Flushing mechanism with low water consumption
US5005226A (en) * 1989-11-30 1991-04-09 American Standard Inc. Flushing mechanism with low water consumption
US5046201A (en) * 1990-04-16 1991-09-10 Kohler Co. Pressurized flush toilet tank
GB2277108A (en) * 1993-04-16 1994-10-19 W C Technology Corp Hydraulically controlled pressurized water closet flushing system
US5363513A (en) * 1993-09-22 1994-11-15 Karl Blankenburg Pressurized flushing toilet
US5551466A (en) * 1993-09-20 1996-09-03 Caroma Industries Limited Hydraulic valve
US5553333A (en) * 1993-09-30 1996-09-10 Andersson; Sven E. Pressurized water closet flushing system
US6263519B1 (en) 2000-04-07 2001-07-24 Arichell Technologies, Inc. Automatic tank-type flusher
US6321395B1 (en) 2000-11-20 2001-11-27 Arichell Technologies, Inc. Timed fluid-linked flush controller
US6343387B1 (en) 2000-12-06 2002-02-05 W/C Technology Corporation Volume control for a water closet
US6360378B2 (en) * 1993-04-08 2002-03-26 W/C Technology Corporation Pressurized water closet flushing system
US6370707B1 (en) 2001-01-16 2002-04-16 Arichell Technologies, Inc. Supply-line-sealed flush controller
US6425145B1 (en) 2001-09-21 2002-07-30 Arichell Technologies, Inc. Push button for metered flow
US6453479B1 (en) 2001-01-16 2002-09-24 Arichell Technologies, Inc. Flusher having consistent flush-valve-closure pressure
US6457187B1 (en) 2000-02-11 2002-10-01 Pulf Water Systems Inc. Pressurized water closet flushing system
US20040021110A1 (en) * 2000-04-06 2004-02-05 Beh Thomas P. Control valve for a water closet
US20040025238A1 (en) * 2000-11-20 2004-02-12 Arichell Technologies, Inc. Toilet flusher with novel valves and controls
US6732997B2 (en) 2000-04-06 2004-05-11 The Chicago Faucet Company Control valve for a water closet
US20040194200A1 (en) * 2003-04-04 2004-10-07 Feiyu Li Pressure assisted dual flush operating system
US20050133754A1 (en) * 2002-04-10 2005-06-23 Parsons Natan E. Toilet flusher for water tanks with novel valves and dispensers
US20050150038A1 (en) * 2004-01-08 2005-07-14 Feiyu Li Pressurized flush system
US20050161625A1 (en) * 2000-04-06 2005-07-28 Beh Thomas P. Adjustable metering actuator assembly for a water closet
US7591027B2 (en) 2007-02-22 2009-09-22 Donald Ernest Scruggs Flushette partial and full toilet flush devices
US8756721B1 (en) * 2011-03-29 2014-06-24 Ryan Dewey Toilet with built-in plunger
US20180363281A1 (en) * 2015-04-07 2018-12-20 Frantisek Pancurák A toilet bowl pressure flushing system with shock wave flushing

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6550076B1 (en) * 2001-09-28 2003-04-22 Sloan Valve Company Valve assembly for a pressure flush system
WO2009008690A2 (fr) * 2007-07-06 2009-01-15 Oleg Badyrov Réservoir de rinçage de wc
WO2009028975A1 (fr) * 2007-08-27 2009-03-05 Miekka, Alexandr Sergeevich Dispositif sanitaire de toilette fonctionnant à haute pression

Cited By (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4176821A (en) * 1976-03-05 1979-12-04 Georg Rost & Sohne Pilot-operated valve assembly
US4233698A (en) * 1977-01-28 1980-11-18 Water Control Products/N.A., Inc. Pressure flush tank for toilets
US4955921A (en) * 1989-11-30 1990-09-11 American Standard Inc. Flushing mechanism using phase change fluid
US4984311A (en) * 1989-11-30 1991-01-15 American Standard Inc. Flushing mechanism with low water consumption
US5005226A (en) * 1989-11-30 1991-04-09 American Standard Inc. Flushing mechanism with low water consumption
US5046201A (en) * 1990-04-16 1991-09-10 Kohler Co. Pressurized flush toilet tank
US6360378B2 (en) * 1993-04-08 2002-03-26 W/C Technology Corporation Pressurized water closet flushing system
GB2277108A (en) * 1993-04-16 1994-10-19 W C Technology Corp Hydraulically controlled pressurized water closet flushing system
GB2277108B (en) * 1993-04-16 1996-10-30 W C Technology Corp Hydraulically controlled pressurized water closet flushing system
US5551466A (en) * 1993-09-20 1996-09-03 Caroma Industries Limited Hydraulic valve
WO1995008678A1 (en) * 1993-09-22 1995-03-30 Karl Blankenburg Pressurized flushing toilet
US5363513A (en) * 1993-09-22 1994-11-15 Karl Blankenburg Pressurized flushing toilet
US5553333A (en) * 1993-09-30 1996-09-10 Andersson; Sven E. Pressurized water closet flushing system
US6457187B1 (en) 2000-02-11 2002-10-01 Pulf Water Systems Inc. Pressurized water closet flushing system
US20050161625A1 (en) * 2000-04-06 2005-07-28 Beh Thomas P. Adjustable metering actuator assembly for a water closet
US20040021110A1 (en) * 2000-04-06 2004-02-05 Beh Thomas P. Control valve for a water closet
US6732997B2 (en) 2000-04-06 2004-05-11 The Chicago Faucet Company Control valve for a water closet
US6896237B2 (en) 2000-04-06 2005-05-24 Geberit Technik Ag Control valve for a water closet
US6263519B1 (en) 2000-04-07 2001-07-24 Arichell Technologies, Inc. Automatic tank-type flusher
US6321395B1 (en) 2000-11-20 2001-11-27 Arichell Technologies, Inc. Timed fluid-linked flush controller
US20040025238A1 (en) * 2000-11-20 2004-02-12 Arichell Technologies, Inc. Toilet flusher with novel valves and controls
US6934976B2 (en) 2000-11-20 2005-08-30 Arichell Technologies, Inc. Toilet flusher with novel valves and controls
US6343387B1 (en) 2000-12-06 2002-02-05 W/C Technology Corporation Volume control for a water closet
US6370707B1 (en) 2001-01-16 2002-04-16 Arichell Technologies, Inc. Supply-line-sealed flush controller
US6453479B1 (en) 2001-01-16 2002-09-24 Arichell Technologies, Inc. Flusher having consistent flush-valve-closure pressure
US6425145B1 (en) 2001-09-21 2002-07-30 Arichell Technologies, Inc. Push button for metered flow
US20050133754A1 (en) * 2002-04-10 2005-06-23 Parsons Natan E. Toilet flusher for water tanks with novel valves and dispensers
US7562399B2 (en) 2002-04-10 2009-07-21 Arichell Technologies Toilet flusher for water tanks with novel valves and dispensers
US20040194200A1 (en) * 2003-04-04 2004-10-07 Feiyu Li Pressure assisted dual flush operating system
US7010816B2 (en) 2003-04-04 2006-03-14 Feiyu Li Pressure assisted dual flush operating system
US20050150038A1 (en) * 2004-01-08 2005-07-14 Feiyu Li Pressurized flush system
US7299508B2 (en) 2004-01-08 2007-11-27 Feiyu Li Pressurized flush system
US7591027B2 (en) 2007-02-22 2009-09-22 Donald Ernest Scruggs Flushette partial and full toilet flush devices
USRE44783E1 (en) 2007-02-22 2014-03-04 Donald E. Scruggs Flushette partial and full toilet flush devices
US8756721B1 (en) * 2011-03-29 2014-06-24 Ryan Dewey Toilet with built-in plunger
US20180363281A1 (en) * 2015-04-07 2018-12-20 Frantisek Pancurák A toilet bowl pressure flushing system with shock wave flushing
US10941550B2 (en) * 2015-04-07 2021-03-09 Swiss Aqua Technologies Ag Toilet bowl pressure flushing system with shock wave flushing

Also Published As

Publication number Publication date
BR7306321D0 (pt) 1974-08-29
SE390429B (sv) 1976-12-20
CA1009801A (en) 1977-05-10
FR2196424B1 (sv) 1980-04-04
NL7311008A (sv) 1974-02-19
GB1446722A (en) 1976-08-18
AU5887873A (en) 1975-02-06
FR2196424A1 (sv) 1974-03-15
IT990363B (it) 1975-06-20
DE2340449A1 (de) 1974-02-28
BE803655A (fr) 1974-02-18

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Legal Events

Date Code Title Description
AS Assignment

Owner name: WATER CONTROL PRODUCTS, INC., 1100 OWENDALE, TROY,

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:CITIZENS NATIONAL BANK OF CHEBOYGAN;REEL/FRAME:003886/0008

Effective date: 19810720

AS Assignment

Owner name: MOLMEC, INC., 4205 MARTIN ROAD, WALLED LAKE, MI A

Free format text: MORTGAGE;ASSIGNOR:WATER CONTROL PRODUCTS, INC., A CORP. OF DE;REEL/FRAME:003915/0843

Effective date: 19810831

AS Assignment

Owner name: WATER CONTROL PRODUCTS, INC., A DE CORP

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST. RELEASE OF SECURITY INTEREST IN SAID PATENTS RECORDED AT REEL 3915 FRAMES 843-846.;ASSIGNOR:MOLMEC, INC.;REEL/FRAME:004658/0683

Effective date: 19861223