US Patent No: 6,338,681
Number of patents in Portfolio can not be more than 2000
Magnetic transmission structure
Stats
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Jan 15, 2002
Issued date -
Jun 9, 2000
filing date -
09/590,699
serial no -
Expired
status
Importance
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Abstract
A magnetic transmission structure for a laser level includes a driving member provided with two opposite first chambers in each of which is fitted a magnet, a driven member provided with two opposite second chambers arranged in alignment with the first opposite chambers, each of the second chamber being provided with a magnet, and a motor having an output axle drivingly connected with an intermediate portion of the driving member, whereby the driven member will be rotated with the driving member without direct interconnecting members when the motor is turned on.
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First Claim
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 4,751,782 Laser beam levelling instruments | 40 | 1986 | |
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| 4,645,432 Magnetic drive vehicle coolant pump | 7 | 1986 | |
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| 5,770,795 Fluid mixture testing cell suited for detecting phase changes | 5 | 1996 | |
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| 4,827,642 Drive mechanism | 2 | 1985 | |
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| 5,552,886 Laser beam transmitting apparatus | 45 | 1995 | |
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| 4,379,624 Laser beam steering device | 14 | 1981 | |
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| 4,512,626 Rotating mirror scanner | 18 | 1983 | |
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| 5,619,802 Automatic level and plumb tool | 49 | 1994 | |
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| 5,533,268 Laser deflection apparatus for laser compass | 27 | 1994 | |
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| 6,035,540 Automatic optical levelling, plumbing, and verticality-determining apparatus | 49 | 1998 | |
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 | Jul 15, 2013 |
| 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 |