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Method of Attaching a Filling Bell Disclosure Number: IPCOM000197771D
Publication Date: 2010-Jul-21
Document File: 1 page(s) / 27K

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The Prior Art Database


A filling bell can be used on point of use filters and the like. Typically they are held on by a friction fit. However at times the bell may release. Others have tried glues or heat bonds which while overcoming the issue create problems as they are permanent attachments. The use of a hose barb on the device and an attachment device on the filling bell designed to be connected to the barb makes for a secure but removable fitting. The use of grooves, undercuts, flexible fingers and/or threads is taught. Additionally the uppermost outer surface of the bell may sit against the outer surface of the connector to provide additional stability to the bell on the connector and to in some cases provide a positive pressure of the inner surface of the bell against the barb to keep the two elements connected securely.

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Methods of Attaching a Filling


to a Connection

Plastic filling bells are often attached to a connector such as an outlet of filters or hoses to provide a covered area around the area where a liquid is being dispensed. The bell reduces the potential for environmental contaminants from entering into the dispensed liquid. It also reduces the potential for aerosols reaching the user.

Generally filling bells have been permanently attached to the outlet such as by being molded to the outlet, or adhered to the outlet such as by glues or heat bonding or they have been attached by simple friction fitting.

One method is to use an outlet that contains a hose barb fitting at its end. In Figure 1, is shown a cross sectional view of a bell 2 fit to the hose barb 4 of the connector 6. The bell 2 has a groove 8 formed in the inner surface 10 of the bell 2 that mates with the hose barb 4. The bell 2 is slid over the hose barb 4 and the groove 8 locks securely behind the barb 12 on the connector 6.

Alternatively, as shown in Figures 2 and 3, the inner surface 10 of the bell 2 that connects to the barb 12 may have a series of fingers 14 that flex as the bell 2 is fitted to the connector 6. The fingers 14 fit behind the barb 12 to hold the bell 2 securely to the connector 6.

Another embodiment as shown in Figure 4 uses an undercut 16 on the inner surface 10 of the bell 2 that fits behind the barb 12 when the bell 2 is press fit in place on the hose barb 4 of the connector 6.  

Optionally ...