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Pressure activated switching device    
United States Patent5962118   
Link to this pagehttp://www.wikipatents.com/5962118.html
Inventor(s)Burgess; Lester E. (Swarthmore, PA)
AbstractA pressure sensitive sparkless switching device includes a layer of piezoresistive cellular polymer foam, at least two conductive layers, and an insulative spacer element having at least one opening. When pressure is applied to the device the piezoresistive foam disposes itself through the opening of the spacer element and makes electrical contact between the conductive layers. The resistance of the piezoresistive foam varies with the amount of pressure applied to provide an analog as well as on-off function. The device may also provide multiple switching, and shear detection capabilities.
   














 Title Information Submit all comments and votes
 
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Drawing from US Patent 5962118
Pressure activated switching device - US Patent 5962118 Drawing
Pressure activated switching device
Inventor     Burgess; Lester E. (Swarthmore, PA)
Owner/Assignee    
Patent assignment
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Publication Date     October 5, 1999
Application Number     08/959,059
PAIR File History     Application Data   Transaction History
Image File Wrapper   Patent Term   Fees
Litigation
Filing Date     October 29, 1997
US Classification     428/308.4 252/503 252/62.9R 264/45.3 338/114
Int'l Classification    
Examiner     Jones; Deborah
Assistant Examiner     Lam; Cathy F.
Attorney/Law Firm     Dilworth & Barrese
Address
Parent Case     This is a divisional of application Ser. No. 08/429,683 filed Apr. 27, 1995 now U.S. Pat. No. 5,695,859.
Priority Data    
USPTO Field of Search     439/91 439/591 439/594 439/927 338/114 340/667 428/308.4 428/465 252/511 252/62.9 264/45.3
Patent Tags     pressure activated switching
   
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 References Submit all comments and votes
 
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 U.S. References
 
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5656344
Sawa et al.

Aug,1997

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Market Size
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$5B - $10B
$2B - $5B
$500M - $2B
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$0   $2.5B   $5B   $7.5B   $10B
Market Share
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75% - 100%
50% - 74.99%
25% - 49.99%
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< 1%
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Reasonable Royalty
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50% - 74.99%
25% - 49.99%
10 - 24.99%
5 - 9.99%
2 - 4.99%
1 - 1.99%
< 1%
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