Quick disconnect for sewage system

• US 4,702,274 A
• Filed: 06/17/1986
• Issued: 10/27/1987
• Est. Priority Date: 06/17/1986
• Status: Expired due to Term

• Current Assignee: Campbell Manufacturing Inc.
• Original Assignee: Martinson Manufacturing Co., Inc.
• Inventors: Kramer, Dean C.
• Primary Examiner(s): Cohan, Alan
• Assistant Examiner(s): Rivell, John A.
• Application Number:
  US06/875,070
• Time in Patent Office: 497 Days
• Field of Search: 137/515, 137/515.5, 137/855, 137/858, 285/179, 285/181, 285/325
• US Class Current: 137/515.5
• CPC Class Codes: E03F 3/04 Pipes or fittings specially adapted to sewers manufacture of concrete tubes B28; pipes or pipe fittings in general F16L
• CPC Class Codes: E03F 5/22 Adaptations of pumping plants for lifting sewage wheeled apparatus for emptying sewers or cesspools E03F7/10; pumps, pumping plants, per se F04
• CPC Class Codes: F16K 15/144 the closure elements being fixed along all or a part of their periphery
• CPC Class Codes: F16K 15/1441 with biasing means in addition to material resiliency, e.g. spring
• CPC Class Codes: F16K 15/16 with tongue-shaped laminae
• CPC Class Codes: F16K 15/161 with biasing means in addition to material resiliency, e.g. spring
• CPC Class Codes: Y10T 137/7856 Valve seat formed on or carried by a coupling element
• CPC Class Codes: Y10T 137/7891 Flap or reed

Abstract

A quick disconnect coupling device for connecting the vertical pipe from a submersible pump in a sewage system to a horizontal pipe includes male and female coupling members. The female coupling member is connected to the horizontal pipe and is coupled to the male coupling member by guideways which are engaged by guide elements on the male coupling member. The male member includes a pair of coupling elements which are connected together to form a 90-degree coupling. A flap type check valve is clamped between the coupling elements of the male coupling member and permits the flow of waste water through the coupling, but prevents the return flow of waste water to the submersible pump.

Claims

1. A quick disconnect coupling device for coupling a vertical discharge conduit of a sump pump to a horizontal conduit through which waste water is discharged, comprising:

a pair of coupling members coupled together in communicating relation, one of said coupling members being connected to the vertical discharge conduit of the sump pump and the other coupling member being connected to the horizontal conduit, said one coupling member comprising a pair of coupling elements connected together in communicating relation, each of said coupling elements having a substantially planar front coupling face and a substantially planar rear coupling face disposed at an angle with respect to the associated front coupling face thereof, the included angle defined between the front coupling face of one coupling element and the rear coupling face of the other coupling element being 90 degrees, whereby said one coupling member defines a 90-degree elbow,

a one-way check valve positioned between and secured to said coupling elements, said check valve comprising a flap hingedly connected between said coupling elements and being swingable to an open position in response to fluid pressure produced by the sump pump and being swingable to the closed position obstructing the flow of liquiid through the quick disconnect coupling device in the return direction, said check valve being disposed in inclined relation with respect to the horizontal conduit,

one of said coupling elements being connected in communicating relation to the vertical discharge conduit, the other of said coupling elements having vertical substantially straight guide elements integral therewith and projecting laterally outwardly from opposite sides thereof,

said other coupling member being of single piece construction and having a pair of vertical substantially straight guideways adjacent the marginal portions thereof and being engaged by the guide elements of said other coupling element when said coupling members are coupled together, means on the upper portion of said other coupling element engaging said other coupling member when said coupling members are in coupled relation to position said coupling members in registering relation with respect to each other.

2. The quick disconnect coupling device as defined in claim 1 wherein the included angle between said front and rear faces of said one coupling element comprises an angle of approximately 52 degrees.

3. The quick disconnect coupling device as defined in claim 2 wherein the included angle defined between the front and rear coupling faces of said other coupling element comprises an angle of approximately 38 degrees.

4. A quick disconnect coupling device as defined in claim 1 and means defining a sealing gasket and mounting member integral with said check valve flap and being positioned exteriorly thereof and permitting hinging movement therebetween, said sealing gasket and mounting member being clamped between the coupling elements comprising said one coupling member.