IP Library Granted Patent US 8,673,072
Granted Patent B2
US 8,673,072 · App. 12/636,991 · Granted Mar 18, 2014

Crystal grower with integrated litz coil

View Patent ↗
Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 8,673,072
App. No.
12/636,991
Granted
Mar 18, 2014
Kind
B2
Abstract

An apparatus and method of manufacturing a crystal grower is disclosed. The crystal growing apparatus includes a receptacle constructed to receive a material selected to grow a crystal and an induction heater constructed to heat the material, with the induction heater comprising a Litz coil and a hose constructed to receive the Litz coil therein. The hose further comprises an inner liner formed of an electrically non-conductive material, a reinforcement layer surrounding the inner liner to provide structural reinforcement thereto, and an outer liner applied about the reinforcement layer to form an exterior of the hose.

Claims (39)

1. A crystal growing apparatus comprising:

a receptacle constructed to receive a material selected to grow a crystal; and

an induction heater constructed to heat the material, the induction heater comprising a Litz coil and a hose constructed to receive the Litz coil therein;

wherein the hose further comprises:

an inner liner formed of an electrically non-conductive material;

a reinforcement layer surrounding the inner liner to provide structural reinforcement thereto; and

an outer liner applied about the reinforcement layer to form an exterior of the hose.

2. The crystal growing apparatus of claim 1 further comprising a water passage extending through the hose and constructed to allow a water flow therethrough to cool the Litz coil.

3. The crystal growing apparatus of claim 2 wherein the water passage is configured to accommodate a flow rate of 3 gallons per minute.

4. The crystal growing apparatus of claim 1 wherein the hose is configured to have an electrical resistivity of greater 100 gigaohms at 1000 Volts DC.

5. The crystal growing apparatus of claim 1 wherein the inner liner is configured to operate at a temperature up to 180 degrees Fahrenheit, and wherein the outer liner is configured to operate at a temperature up to 1000 degrees Fahrenheit.

6. The crystal growing apparatus of claim 5 further comprising a housing positioned about the induction heater, and wherein the Litz coil and the hose are routed within the housing so as to encircle the receptacle.

7. The crystal growing apparatus of claim 6 wherein the housing is composed of a castable refractory material.

8. The crystal growing apparatus of claim 1 further comprising a replaceable liner positioned between the receptacle and the induction heater, the replaceable liner configured to thermally insulate the induction heater from the receptacle.

9. A method of manufacturing a crystal grower comprising:

providing a reservoir to receive a crystal growing material therein;

coiling a Litz coil about the reservoir;

attaching at least one leg to the coiled portion of the Litz coil to maintain a coiled orientation of the coiled portion of the Litz coil; and

casting a refractory housing about the coiled portion of the Litz coil, the refractory housing being affixed to the at least one leg.

10. The method of claim 9 further comprising providing a hose to receive the Litz coil, wherein providing the hose comprises:

providing an inner liner formed of an electrically non-conductive material, the inner liner having an inner diameter greater than an outer diameter of the Litz coil such that a space is maintained therebetween to allow for flow of a coolant between the Litz coil and the inner liner;

providing a reinforcement layer positioned about the inner liner to provide structural reinforcement thereto; and

providing an outer liner applied about the reinforcement layer to form an exterior of the hose.

11. The method of claim 9 further comprising positioning a replaceable liner between the reservoir and the Litz coil to thermally insulate the Litz coil from the reservoir.

12. The method of claim 9 wherein attaching at least one leg to the coiled portion of the Litz coil comprises attaching at least one leg having a bottom surface coinciding with a bottom surface of the housing.

13. The method of claim 9 wherein attaching at least one leg to the coiled portion of the Litz coil comprises attaching at least one leg having a bottom surface extending down past a bottom surface of the housing.

14. An induction heater comprising:

a casing having a first end and a second end;

a coil of woven strands of wire having a first end and a second end and passing through the casing; and

a lead connected to an end of the coil of woven strands of wire and having a passage therethrough, the passage constructed to provide coolant to a space between the coil of woven strands of wire and the casing;

wherein the casing comprises:

an inner liner formed of an electrically non-conductive material;

a reinforcement layer surrounding the inner liner to provide structural reinforcement thereto; and

an outer liner applied about the reinforcement layer to form an exterior of the casing.

15. The induction heater of claim 14 wherein the casing is configured to have an electrical resistivity of greater 100 gigaohms at 1000 Volts DC.

16. The induction heater of claim 14 wherein the inner liner is configured to operate at a temperature up to 180 degrees Fahrenheit, and wherein the outer liner is configured to operate at a temperature up to 1000 degrees Fahrenheit.

17. The induction heater of claim 14 further comprising a housing having an opening therethrough and extending about the casing, the housing being composed of a castable refractory material.

18. The induction heater of claim 14 wherein individual wires of the coil of woven strands of wire are electrically isolated from one another along a length of the individual wires.

19. The induction heater of claim 14 incorporated into a crystal growing device and constructed to heat a crystal growing material.

Assignments (5)
SECURITY INTEREST Recorded Jul 31, 2025
From: AJAX TOCCO MAGNETHERMIC CORPORATION
To: COMPUTERSHARE TRUST COMPANY, N.A., AS NOTES COLLATERAL AGENT
Reel/Frame 071897/0979 →
SECURITY AGREEMENT Recorded Mar 26, 2012
From: AJAX TOCCO MAGNETHERMIC CORPORATION; ILS TECHNOLOGY LLC; PARK-OHIO INDUSTRIES, INC.; RB&W MANUFACTURING LLC; SNOW DRAGON LLC; TOCCO, INC.; RB&W LTD.; FLUID ROUTING SOLUTIONS, INC.
To: JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT
Reel/Frame 027923/0635 →
CORRECTIVE ASSIGNMENT TO CORRECT THE ASSIGNEE NAME PREVIOUSLY RECORDED ON REEL 026647 FRAME 0095. ASSIGNOR(S) HEREBY CONFIRMS THE CORRECT ASSIGNEE NAME IS AJAX TOCCO MAGNETHERMIC CORPORATION. Recorded Aug 10, 2011
From: ABP INDUCTION, LLC
To: AJAX TOCCO MAGNETHERMIC CORPORATION
Reel/Frame 026724/0947 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 26, 2011
From: ABP INDUCTION LLC
To: AJAX MAGNETHERMIC CORPORATION
Reel/Frame 026647/0095 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 14, 2009
From: WISEMAN, DONALD H.
To: ABP INDUCTION, LLC
Reel/Frame 023647/0510 →