Keyswitch for computer keyboard
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United States of America Patent
Stats
-
Jul 3, 1990
Grant Date -
N/A
app pub date -
Aug 30, 1989
filing date -
Aug 30, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A keyswitch operator includes a supporting bearing block and axially movable keytop and plunger. A cylindrical plunger is slidably guided between alternating flat and conical surfaces about a through bore in the bearing block. The flat surfaces provide constant bearing guides along multiple axial lines angularly spaced about the plunger. The conical surfaces provide draft to facilitate removal of a mold after forming of the through bore. Both 'quiet tactile' and 'click tactile' modes of operation are available when utilizing the keyswitch operator in conjunction with a yieldable dome overlying a membrane switch assembly. 'Click tactile' operation requires the addition of a spring-biased piston to physically engage the underlying switch assembly when the plunger has been depressed.
First Claim
Family
- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
- KEY TRONIC CORPORATION
International Classification(s)
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Damitio, Stephen S | Spokane, WA | 6 | 85 |
English, George P | Hayden Lake, ID | 10 | 214 |
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Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
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