The Special Machines group designs unique solutions, serving numerous industries with a focus on the HVAC and Appliance industries.
Click here to see a video about our our Special Machines building capabilities.
Ehrhardt holds several U.S. Patents pertaining to the design and manufacture of residential furnace heat exchangers and blower housings. Other work includes patents assigned to customers.
- Patent No: 5,119,706 Issue Date: June 9, 1992 Machine process for chamfering of precision pieces having non-linear edges device therefore
- Patent No: 10/666,391 Issue Date: September 19, 2003 Method and apparatus for fabricating helically shaped ribbons of material
- Patent No: 5,221,183 Issue Date: June 22, 1993 Blower housing seam and method of making same
- Patent No: 5,195,580 Issue Date: March 23, 1993 Heat exchanger seam and method of making same
- Patent No: 5,575,330 Issue Date: November 19, 1996 Furnace heat exchanger seal and method of making same
- Patent No: 5,253,502 Issue Date: October 19, 1993 Apparatus and method for bending and forming sheet material
