发明授权
- 专利标题： Expansion composition
- 专利标题（中）： 膨胀成分
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申请号： US837813申请日： 1997-04-22
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公开(公告)号： US5971288A公开(公告)日： 1999-10-26
- 发明人: Lora L. Davis , James P. O'Shea , Eric B. Thorstensen
- 申请人： Lora L. Davis , James P. O'Shea , Eric B. Thorstensen
- 申请人地址： MA Waltham
- 专利权人： Standard-Thomson Corporation
- 当前专利权人： Standard-Thomson Corporation
- 当前专利权人地址： MA Waltham
- 主分类号： G05D23/02
- IPC分类号： G05D23/02 ; G05D23/13 ; G05D23/19 ; H01B1/22 ; H01B1/24 ; G05D23/275
摘要：
A thermostatic control valve has an expansion composition held in a cavity thereof. The composition contains electrical conductor particles dispersed throughout an electrical isolator. The particles conduct electrical current through the isolator when the electrical isolator has a volumetric size that is less than a predetermined expanded volume. When the isolator expands to the predetermined expanded volume, the distance between the particles is increased to the extend that the electrical current cannot be conducted.
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