US 12,220,379 B2
Low EMF halogen tube heater
Raleigh C. Duncan, Berkeley, CA (US)
Assigned to Sauna Works Inc., Berkeley, CA (US)
Filed by Sauna Works Inc., Berkeley, CA (US)
Filed on Jan. 2, 2024, as Appl. No. 18/402,632.
Application 18/402,632 is a continuation of application No. 17/931,889, filed on Sep. 13, 2022, granted, now 11,896,547.
Application 17/931,889 is a continuation of application No. 16/693,109, filed on Nov. 22, 2019, granted, now 11,471,376, issued on Oct. 18, 2022.
Application 16/693,109 is a continuation of application No. 15/226,756, filed on Aug. 2, 2016, granted, now 10,517,794, issued on Dec. 31, 2019.
Application 15/226,756 is a continuation in part of application No. 13/427,899, filed on Mar. 23, 2012, granted, now 9,844,100, issued on Dec. 12, 2017.
Claims priority of provisional application 62/200,077, filed on Aug. 2, 2015.
Claims priority of provisional application 61/467,884, filed on Mar. 25, 2011.
Prior Publication US 2024/0130929 A1, Apr. 25, 2024
Int. Cl. A61H 33/06 (2006.01); H05B 3/00 (2006.01); H05B 6/44 (2006.01)
CPC A61H 33/063 (2013.01) [H05B 3/008 (2013.01); H05B 6/44 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A heater for a sauna, said heater comprising:
a first heating mechanism including in the sauna;
a second heating mechanism configured to generate heat, wherein the first heating mechanism is implemented an adjustable distance from the second heating mechanism, and wherein the adjustable distance between the first heating mechanism and the second heating mechanism is configured to reduce an amount of electromagnetic field (EMF) emitted by the heater to be lower than a designated amount of EMF; and
a source of alternating current electrically coupled to the first heating mechanism and the second heating mechanism such that the source of alternating current is configured to provide the first heating mechanism and the second heating mechanism with a current, wherein the current powering the first heating mechanism is out of phase with the current powering the second heating mechanism.