Dual thermochromic liquid crystal temperature sensing for...

Details Dual thermochromic liquid crystal temperature sensing for... Dual thermochromic liquid crystal temperature sensing for...

2004-12-27

2009-06-30

Norman, Marc E (Department: 3744)

Refrigeration

With indicator or tester

Diverse function indicators or testers

C062S129000, C062S149000

Reexamination Certificate

active

07552596

ABSTRACT:
The sufficiency of refrigerant charge in an air conditioning system is determined by a comparison of two sensed temperatures in the system, one being the liquid line temperature and the other being either the outdoor temperature or the condenser coil temperature. In one embodiment the two sensed temperatures are displayed on respective thermochromic strips which are so calibrated and juxtaposed as to provide a visual indication, by the relative positions of the two displayed sensed temperatures, as to whether the refrigerant charge is adequate. In another embodiment, the sensed liquid line temperature is displayed by way of a plurality of LEDs and the other temperature is displayed by way of a marker on a temperature scale. If the two displayed temperatures are aligned, then the refrigerant charge is optimized, and if they are not aligned, the system is undercharged or overcharged.

REFERENCES:
patent: 4114448 (1978-09-01), Merritt
patent: 4304126 (1981-12-01), Yelke
patent: 4325223 (1982-04-01), Cantley
patent: 4381549 (1983-04-01), Stamp, Jr. et al.
patent: 4429578 (1984-02-01), Darrel et al.
patent: 4510576 (1985-04-01), MacArthur et al.
patent: 4541284 (1985-09-01), Guagliumi et al.
patent: 4561261 (1985-12-01), Kornrumpf et al.
patent: 4624112 (1986-11-01), Proctor
patent: 4745519 (1988-05-01), Breidegam
patent: 4798055 (1989-01-01), Murray et al.
patent: 4805416 (1989-02-01), Manz et al.
patent: 4841734 (1989-06-01), Torrence
patent: 4856288 (1989-08-01), Weber
patent: 4982576 (1991-01-01), Proctor et al.
patent: 5016472 (1991-05-01), Amrhein et al.
patent: 5046322 (1991-09-01), Bulla et al.
patent: 5057965 (1991-10-01), Wilson
patent: 5079930 (1992-01-01), Beaverson et al.
patent: 5156012 (1992-10-01), Kuribara et al.
patent: 5186012 (1993-02-01), Czachorski et al.
patent: 5206963 (1993-05-01), Wiens
patent: 5214918 (1993-06-01), Oguni et al.
patent: 5228304 (1993-07-01), Ryan
patent: H1226 (1993-09-01), VanReene et al.
patent: 5241833 (1993-09-01), Ohkoshi
patent: 5248168 (1993-09-01), Chichester et al.
patent: 5251453 (1993-10-01), Stanke et al.
patent: 5295360 (1994-03-01), Olds et al.
patent: 5317903 (1994-06-01), McClelland et al.
patent: 5341649 (1994-08-01), Nevitt et al.
patent: 5354103 (1994-10-01), Torrence et al.
patent: 5362530 (1994-11-01), Kitami et al.
patent: 5374084 (1994-12-01), Potokar
patent: 5381669 (1995-01-01), Bahel et al.
patent: 5406980 (1995-04-01), Allread et al.
patent: 5413147 (1995-05-01), Moreiras et al.
patent: 5423189 (1995-06-01), Nicol et al.
patent: 5425558 (1995-06-01), Dennany, Jr.
patent: 5430692 (1995-07-01), Grupp et al.
patent: 5463377 (1995-10-01), Kronberg
patent: 5464042 (1995-11-01), Haunhorst
patent: 5468028 (1995-11-01), Olson
patent: 5474336 (1995-12-01), Hoff et al.
patent: 5540463 (1996-07-01), Potokar
patent: 5694778 (1997-12-01), Wilson
patent: 5752726 (1998-05-01), Fixemer
patent: 5807332 (1998-09-01), Augustine et al.
patent: 5834943 (1998-11-01), Miller
patent: 5868437 (1999-02-01), Teague
patent: 5961157 (1999-10-01), Baron et al.
patent: 6012743 (2000-01-01), Godeau et al.
patent: 6045742 (2000-04-01), McGrevy
patent: 6155612 (2000-12-01), Szabo
patent: 6179214 (2001-01-01), Key et al.
patent: 6302654 (2001-10-01), Millet et al.
patent: 6308523 (2001-10-01), Scaringe
patent: 6324854 (2001-12-01), Jayanth
patent: 6330802 (2001-12-01), Cummings et al.
patent: 6354332 (2002-03-01), Burkhardt et al.
patent: 6382678 (2002-05-01), Field et al.
patent: 6436053 (2002-08-01), Knapp et al.
patent: 6442953 (2002-09-01), Trigiani et al.
patent: 6460354 (2002-10-01), Yabuki et al.
patent: 6470695 (2002-10-01), Gong
patent: 6481756 (2002-11-01), Field et al.
patent: 6497435 (2002-12-01), Luft et al.
patent: 6546823 (2003-04-01), Veit
patent: 6550341 (2003-04-01), van Schoor et al.
patent: 6553774 (2003-04-01), Ishio et al.
patent: 6571566 (2003-06-01), Temple et al.
patent: 6594554 (2003-07-01), Seem et al.
patent: 6658373 (2003-12-01), Rossi et al.
patent: 6758051 (2004-07-01), Jayanth et al.
patent: 6769258 (2004-08-01), Pierson
patent: 6868678 (2005-03-01), Mei et al.
patent: 7079967 (2006-07-01), Rossi et al.
patent: 2002/0024218 (2002-02-01), Manuli
patent: 2002/0096209 (2002-07-01), Danielson et al.
patent: 2002/0121100 (2002-09-01), Yabuki et al.
patent: 2002/0139128 (2002-10-01), Suzuki et al.
patent: 2002/0141877 (2002-10-01), Jayanth et al.
patent: 2002/0182005 (2002-12-01), Milhas
patent: 2003/0089119 (2003-05-01), Pham et al.
patent: 2003/0158704 (2003-08-01), Triginai et al.
patent: 2003/0172665 (2003-09-01), Matsuoka et al.
patent: 2003/0182950 (2003-10-01), Mei et al.
patent: 2003/0226367 (2003-12-01), Palmer et al.
patent: 2005/0235755 (2005-10-01), Hindman
patent: 0 159 281 (1990-05-01), None
patent: 0 308 160 (1991-06-01), None
patent: 0 453 302 (1991-10-01), None
patent: 0 289 369 (1992-01-01), None
patent: 0 396 029 (1992-09-01), None
patent: 0 550 263 (1993-07-01), None
patent: 0 409 000 (1994-02-01), None
patent: 0 529 758 (1996-06-01), None
patent: 0 760 069 (1997-03-01), None
patent: 0 843 794 (1998-05-01), None
patent: 0 918 182 (1999-05-01), None
patent: 1 238 838 (2002-09-01), None
patent: 1 337 825 (2003-08-01), None
patent: 2667570 (1992-04-01), None
patent: 2 274 695 (1994-08-01), None
patent: 62-218748 (1987-09-01), None
patent: 62-261845 (1987-11-01), None
patent: 63-302238 (1988-12-01), None
patent: 2-110268 (1990-04-01), None
patent: 2-195165 (1990-08-01), None
patent: 4-55671 (1992-02-01), None
patent: 4-190062 (1992-07-01), None
patent: 4-273941 (1992-09-01), None
patent: 5-99475 (1993-04-01), None
patent: 5-231754 (1993-09-01), None
patent: 5-256543 (1993-10-01), None
patent: 7-55299 (1995-03-01), None
patent: 8-68576 (1996-03-01), None
patent: 8-261542 (1996-10-01), None
patent: 8-261543 (1996-10-01), None
patent: 2000-9048 (2000-01-01), None
patent: 2000-154954 (2000-06-01), None
patent: 2001-32884 (2001-02-01), None
patent: 2001-141279 (2001-05-01), None
patent: WO 93/20376 (1993-10-01), None
patent: WO 95/30106 (1995-11-01), None
patent: WO 95/30107 (1995-11-01), None
patent: WO 95/33157 (1995-12-01), None
patent: WO 96/17202 (1996-06-01), None
patent: WO 97/12167 (1997-04-01), None
patent: WO 97/13994 (1997-04-01), None
patent: WO 97/13995 (1997-04-01), None
patent: WO 97/47908 (1997-12-01), None
patent: WO 00/45053 (2000-08-01), None
patent: WO 01/23794 (2001-04-01), None
http://www.uview.com/homepage.html The UVIEW Tempscan A/C diagnostic device model #580000 (1 pg.).
http://findarticles.com/p/articles/mi—qa3828/is—200209/ai—n9119405/pg—8 This reference to Tempscan device is dated in 2002 (10 pgs.).

Affiliated with

Also associated with

Rating

Dual thermochromic liquid crystal temperature sensing for... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Dual thermochromic liquid crystal temperature sensing for..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dual thermochromic liquid crystal temperature sensing for... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4112510