Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – Work or object holding type
Reexamination Certificate
2006-03-07
2006-03-07
Donovan, Lincoln (Department: 2832)
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
Work or object holding type
C269S008000, C335S285000
Reexamination Certificate
active
07009480
ABSTRACT:
A semi-releasable magnetic tool is disclosed. The tool comprises two magnetizable pole plates. Each of said pole plates is bounded by peripheral edges. The pole plates are spaced apart and preferably disposed in substantial registry with one another. A generally non-magnetizable spacer member is positioned between the pole plates and spaced inwardly from the peripheral edges. A magnetic switch is mounted between the pole plates. The switch is switchably associated with at least one magnetic element. The magnetic element positioned so as to magnetize the pole plates. The magnetic element can be switchably moved toward and away from the pole plates so that they are strongly or weakly magnetized. The magnetization of the tool in the weaker configuration is such that the tool can be easily placed in a desired position on a magnetizable workpiece. The tool is clamped in position on the workpiece by moving the magnet(s) closer to the pole plates.
REFERENCES:
patent: 2280437 (1942-04-01), Levesque
patent: 3812629 (1974-05-01), Campbell
patent: 4023267 (1977-05-01), Pignataro
patent: 4055824 (1977-10-01), Baermann
patent: 4314219 (1982-02-01), Haraguchi
patent: 4329673 (1982-05-01), Uchikune et al.
patent: 4393363 (1983-07-01), Iwasaki
patent: 4413417 (1983-11-01), Esposito
patent: 4419644 (1983-12-01), Baermann
patent: 4468649 (1984-08-01), Matsuhashi
patent: 4470032 (1984-09-01), Hernandez et al.
patent: 4475026 (1984-10-01), Schloerb
patent: 5066936 (1991-11-01), Hsu
patent: 5266914 (1993-11-01), Dickson et al.
patent: 5491907 (1996-02-01), Vidmar
patent: 5525950 (1996-06-01), Wang
patent: 6331810 (2001-12-01), Jung
patent: 2211356 (1989-06-01), None
Tsui Gary
Zhu Daqing
Donovan Lincoln
Jagger Bruce A.
Rojas Bernard
Valtra, Inc.
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