Patent Application
20120200081
The present invention relates generally to a connector apparatus and more particularly to a connector that couples together multiple tubes.
Conventionally, various fittings, reducers and connectors have been used to couple together tubes, hoses and pipes (hereinafter, collectively referred to as “tubes”) which carry water, air or other fluid within a residential house, industrial factory, office building or the like. In one such example, a brass adaptor is brazed or soldered to copper tubes. However, new building codes are now requiring that no brazing, soldering or welding be conducted in an environment containing bottled oxygen or other highly flammable materials. Thus, conventional brass adaptors and couplings pose a problem when repair is required in a hospital, retirement home, laboratory or other such facility.
Another example of a conventional coupling is disclosed in U.S. Pat. No. 7,506,897 entitled “Plug-In Coupling for Connecting a Fluid Conduit to a Pipe” which issued to Bauer on Mar. 24, 2009. This patent is incorporated by reference herein. This conventional coupling, however, disadvantageously requires a male pipe to have a unique circumferential groove machined therein to engage a pair of spring legs. Thus, costs are increased and custom pipes are required.
In accordance with the present invention, a connector apparatus is provided. In another aspect, at least a majority of a connector apparatus is a polymeric material. A further aspect of a connector apparatus couples together multiple tubes, which may optionally be of different materials. Yet another aspect employs a connector apparatus which can be of a quick connect variety to one or more tubes without requiring threaded engagement of the tube, thereby avoiding undesired thread stripping and/or thread misalignment. Another aspect is constructed to allow for disengagement of an internally quick connected tube within the connector assembly. A method of connecting multiple tubes with a connector is also provided.
The connector assembly of the present invention is advantageous over conventional devices. For example, the present connector assembly does not require brazing, soldering, welding or other such heating for connection to the tubes. Furthermore, the present connector assembly allows for quick and secure coupling together of multiple tubes. Unlike with some traditional fittings, the present connector assembly does not require threading of the tubes or of fittings to be applied thereto. Easy disassembly of the connector is also provided. Moreover, unique attachment formations, characteristics or grooves are not needed on the connected tubes such that inexpensive standard tubes are employed. Additional advantages and benefits of the present invention are shown in the associated figures, and disclosed in the following description and appended claims.
Referring to
As best seen in
An intermediate section 31 of body 21 contains a pair of circumferentially enlarged and internal pockets within which are secured seals 29. An attachment feature of body 21 includes an internal thread 33 adjacent a female end 35 thereof. An externally threaded attachment feature 36 of collar 25 enmeshes with threads 33 to removably attach collar 25 to body 21. An enlarged diameter flange 37 of collar 25 includes an externally accessible groove or knurl pattern to allow manual or tool gripping and rotation of collar 25 relative to the body for attachment and detachment therebetween. Multiple relief slots are provided within the threaded segment of collar 25 to allow some flexure thereof.
Retainer 27 is preferably stamped from a sheet of carbon spring steel. There are at least two, and more preferably six, teeth 41 that inwardly extend from a continuous circular ring of retainer 27. Each tooth 41 is bent at an offset angle from a nominal plane of the outer ring and each tooth is chamfered to point generally toward male adaptor 23 of connector 11. Collar 25 serves to secure retainer 27 within body 21 when the connector is fully assembled. Alternately, an entirely annular, spring steel retainer can be used which includes a contiguous inside circle on the forwardly offset angled ring segment; the inside circle has a tapered end defining a through-bore, which engages the copper tube in an interference fit manner. It is noteworthy that both retainer embodiments engage at least a majority of a circumference of the inserted tube.
Connector 11 is preassembled such that collar 57, retainer 27 and seals 29 are attached together when the connector is manufactured and prior to shipment to an installer such as a plumber. Thereafter, metallic tube 15 is linearly inserted into the through-bore of a female end 26 of collar 25 until the tube abuts at the transition between body 21 and male adapter 23. This allows seals 29 to engage with and compress against an external surface of tube 15. A low insertion effort, such as approximately 17 or less pounds, is required to manually insert tube 15 through retainer 57. Teeth 41 of retainer 27, however, bite into the exterior surface of tube 15 and require approximately 200-400 pounds or more of extraction force, thereby significantly deterring undesired disassembly. This provides a quick connect feature. A constant circular-cylindrical external section of the tube, free of grooves, threads or localized formations, is engaged by the teeth. Notwithstanding, tube 15 can be easily uncoupled from connector 11 by a person manually unscrewing collar 25 from body 21.
At the other end, a metal cir-clip fastener 49 or the like can optionally be used to secure and clamp the otherwise cylindrical end of tube 13 around male adapter 23 after they have been squeezed together. In this situation, fastener 49 inwardly compresses an internal surface of tube 13 to engage within circumferentially expanded and reduced formations on the outside surface of male adapter 23. For example, a set of circular valleys 51 and adjacent circular peaks or barbs 53, are present in the outside of male adapter 23. At least one valley 51 is at least as wide as the generally concentric fastener 49. This serves to deter undesired removal of tube 13 from connector 11.
An alternate embodiment connector 11 is shown in
While various embodiments of the present connector apparatus have been disclosed, it should be appreciated that other variations are possible. For example, the connector may be made of other materials although many of the present advantages will not be achieved. Furthermore, the retainer can alternately be a polymeric material as long as the insertion and extraction forces, and durability are suitable. Moreover, it is envisioned that the present connector can be employed in other industries, such as connecting together automotive vehicle tubes, airplane tubes, watercraft tubes, robotic and machinery tubes, and the like; however, various advantages may not be realized. It is additionally intended that the attachment feature connecting the collar to the body can use flexible snap fits, a removable cotter pin, or the like although certain benefits may not be utilized. Alternately, the enlarged flange of the collar can have a hexagonal or other polymeric peripheral shape when viewed from its end, to easily mate with a wrench or other tool. The description of the invention is merely exemplary in nature and, thus, variations that do not depart from the gist of the invention are intended to be within the scope of the invention. Such variations are not to be regarded as a departure from the spirit and scope of the present invention.
