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Thermostatic Cartridge with Flow Compensating Expander Disclosure Number: IPCOM000237090D
Publication Date: 2014-May-30
Document File: 6 page(s) / 60K

Publishing Venue

The Prior Art Database

Related People

James Hanson: INVENTOR


The invention provides for the addition of a unique expandable component which improves the thermal response of single wax-element-based valves and cartridges at low flow rates. However, unlike the fixed restrictor components known in both prior art, and current products, the component expands or “grows” to accommodate higher flow rates when water demand is high. This invention effectively improves the operating flow range of not only of a thermostatic faucet, but essentially all wax-based TMV’s, including in-line thermostatic devices.

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  1. Complete this form as soon as possible after you have thought of the invention.


  1. Attach all drawings to this form to ensure a complete disclosure.  If no drawings

exist, prepare a sketch and attach the sketch.  The sketch need not be of high quality,

but should support your written description.


  1. This form should be signed and dated by both you and a witness, preferably your

immediate supervisor.  The witness should not be someone who has helped you

develop the invention.


  1. When completed, return to the Legal Department at Masco Corporation at the

address at the end of this form.


  1. Detailed logs or journals of the continuing development of your invention should

be continuously maintained.




Thermostatic Cartridge w/Single Element & Flow Compensating Expander 


    1. The date you first thought of your invention: 



    1. The date you first prepared a written description of your invention



    1. Have you explained details about your invention to anyone?  Yes


    1. If so, when and to whom?


- Pat Jonte - Delta Supervisor


– Sally Remedios – Delta Codes and Standards


    1. Have you made a sample or prototype of the invention or otherwise reduced the invention

to practice?  Who made it, how and when was it made?

Prototypes are in process. 


    1. Has the invention been offered for sale or sold?  (Including requests for quotes and tradeshow exhibitions.)  If so, when?  No.  The invention has never been offered for sale or sold or publicly disclosed.


    1. Do you anticipate presenting the invention at a seminar or tradeshow, or otherwise publicly disclosing invention, or will the product launch in the near future?  If so, when?

A device using this invention could be scheduled for launch in 2008



Discuss any problems your invention may solve, or advantages your invention may have over prior products or processes:

Case for Anti-Scald Protection

Plumbing Code bodies have mandated that all tub-filler faucets be installed with a thermostatic mixing valve (TMV) to limit and regulate maximum outlet hot water temperature, thus protecting the user from scalding.  Generally, but not necessarily, this maximum temperature is between 110°F and 120° F.  This device must be positioned at or near the point of use and can be either integrated into a faucet or be installed in-line with the faucet or other point-of-use device.  The International Plumbing Code (IPC) mandates that these in-line or integral devices meet the performance and characteristic requirements of ASSE 1070.  Similarly, the Uniform Plumbing Code (UPC) mandates the installation of a device for tub fillers to limit maximum outlet temperature to 120° F.  Additionally, users of hand sprays will benefit from the anti-scald and thermal shock safety of thermostatic faucet products.  Furthermore, faucet products with integral hand sprays are expected to require fut...