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Hoffman Differential Is My Mantra US Patent Design Trucker Hat

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White and White

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Style: Trucker Hat

Looking to cheer your team, promote your brand, or simply keep the sun out of your eyes? Our custom hats are the perfect way to meet all these needs and more. Customise the front with a logo, design, or text and create an essential accessory that you will never leave behind!

  • Adjustable from 43.18 cm to 60.96 cm
  • 100% polyester foam front
  • Wide area to feature your design
  • 100% nylon mesh back keeps you cool
  • Available in 11 colour combinations
Recommended for ages 13+

This product can expose you to chemicals including Diisononyl phthalate (DINP), which is known to the State of California to cause cancer / birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

About This Design

Hoffman Differential Is My Mantra US Patent Design Trucker Hat

Hoffman Differential Is My Mantra US Patent Design Trucker Hat

Plumbers or anyone who lives in an old house with steam heating will enjoy this trucker hat featuring the US Patent 1777333 by William K Simpson for The Hoffman Differential Loop. The Hoffman Differential Loop, a device with no moving parts, keeps water in the boiler by making sure that under no circumstance could pressure in the boiler exceed 10 ounces higher than the return piping. It did this by bleeding pressure into the returns after 10 ounces was reached in the boiler. Thus, for example, if the boiler reached 11 ounces in it, then 1 ounce would be bled into the return pipes, since at no time could the return pipes be more than 10 ounces different than the boiler. What this means is that water would always be able to return to the boiler and steam would always flow since there was a differential pressure between the supply and return pipes. This device maintains an unvarying water line in the boiler independent of boiler pressure, which means that water in the boiler is never lowered to a point where the heat from the fire can exert a destructive influence on the boiler. Celebrate technology that is still applicable today in the home heating systems of old houses with this trucker hat.

Customer Reviews

4.8 out of 5 stars rating2.3K Total Reviews
1899 total 5-star reviews323 total 4-star reviews61 total 3-star reviews17 total 2-star reviews21 total 1-star reviews
2,321 Reviews
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4 out of 5 stars rating
By Roimata K.26 October 2021Verified Purchase
Trucker Hat, White and Black
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I totally love my hats. I love the designs,how the trucker hat fits, the product is amazing. And I can't stop buying them. Very well done, centered well.
5 out of 5 stars rating
By Amandine K.22 September 2015Verified Purchase
Trucker Hat, White and Black
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arrived 16 days after shipping , but not disappointed, really nice quality :) I'll definitely book an other one very soon! amazing , even better than on the website! the color are awesome ! :)
5 out of 5 stars rating
By Janice W.22 March 2022Verified Purchase
Trucker Hat, Tan and Brown
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great present well made and a good fit thanks so much. well made a very nice hat great service

Tags

Hats
hoffman differential loopplumbersis my mantraplumbing technologyus patent 1777333older home steam heating systeminventor geek humourhoffman equalising loopboiler pressureinventor invention
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hoffman differential loopplumbersis my mantraplumbing technologyus patent 1777333older home steam heating systeminventor geek humourhoffman equalising loopboiler pressureinventor invention

Other Info

Product ID: 148621576225661327
Posted on 27/07/2022, 2:44 AM
Rating: G