Lifting magnet

Details Lifting magnet Lifting magnet

2008-07-08

2008-07-08

Kramer, Dean J (Department: 3652)

Handling: hand and hoist-line implements

Magnet

C335S288000, C335S295000

Reexamination Certificate

active

10577002

ABSTRACT:
A lifting magnet having a housing, a rotary magnet unit, and a stationary magnet unit. The lifting magnet also includes a pinion, a socket moving up and down, a slider rotating the pinion to set the magnetization and demagnetization states at top and bottom dead points, respectively, a locking part provided in one of the socket and the slider, a locking unit provided in the other, including a locker, and moving both the socket and the slider up and down while the locker is locked to the locking part, and a locking unit driver alternately driving the locking unit to make the locker released from and locked to the locking part at first and second moving operations, respectively. With this configuration, the lifting magnet can stably keep on and off states of an attractive magnetic force and conveniently performs lifting and carrying operations.

REFERENCES:
patent: 3477050 (1969-11-01), Hinger
patent: 4250478 (1981-02-01), Cardone et al.
patent: 4893858 (1990-01-01), Yoshitani et al.
patent: 5382935 (1995-01-01), Doyelle
patent: 5435613 (1995-07-01), Jung
patent: 6076873 (2000-06-01), Jung
patent: 6331810 (2001-12-01), Jung
patent: 6663154 (2003-12-01), Pancheri
patent: 1243093 (2000-02-01), None
patent: 2-305797 (1990-12-01), None
patent: 8-324951 (1996-12-01), None
patent: 100288245 (2001-05-01), None
patent: 2002-0036825 (2002-05-01), None
Chinese Office Action mailed Feb. 1, 2008 and English Translation thereof.

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