US Patent No: 6,869,192
Number of patents in Portfolio can not be more than 2000
Projector with improved focus ring
Stats
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Mar 22, 2005
Issued date -
Jul 18, 2003
filing date -
10/622,243
serial no -
In Force
status
Importance
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Abstract
A rib, provided on an outer periphery of a projection ring, includes: a first rib extending along a direction in which an optical axis of a lens main body extends (an attachment direction of a focus lens); and a second rib, brought into contact with one end of first rib, extending along a direction approximately orthogonal to first rib so as to have one side and the other side. On the other hand, a protrusion, provided on an inner periphery of the cylindrical focus ring, includes a pair of protrusion parts arranged with a spacing in a direction in which an optical axis extends. With this structure, it is possible to obtain a projector having a focus ring capable of being easily attached to a lens main body and being easily molded.
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First Claim
Related Publications
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 6,573,950 Optical projection apparatus, transmission type screen, and projection type image display apparatus | 8 | 2000 | |
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| 6,364,491 Liquid crystal projector | 16 | 2000 | |
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| 5,737,119 Thermal imaging device | 12 | 1995 | |
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| 6,536,906 Projector | 4 | 2001 | |
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| 5,940,228 Objective lens focus assembly | 6 | 1997 | |
Patent Citation Ranking
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Sep 22, 2016 |
| Fee | Large entity fee | small entity fee | micro entity fee |
|---|---|---|---|
| Surcharge - 11.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| 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 |