Structure of electromagnetic work holder

• US 5,047,742 A
• Filed: 02/21/1991
• Issued: 09/10/1991
• Est. Priority Date: 02/21/1991
• Status: Expired due to Fees

• Current Assignee: P. J. Hsu
• Original Assignee: P. J. Hsu
• Inventors: Hsu, P. J.
• Primary Examiner(s): Picard, Leo P.
• Assistant Examiner(s): BARRERA, RAMON M
• Application Number:
  US07/658,619
• Time in Patent Office: 201 Days
• Field of Search: 335/289, 335/285, 335/286, 335/287, 335/288, 335/295, 269/8
• US Class Current: 335/289
• CPC Class Codes: B23Q 3/1543 using electromagnets

Abstract

A new structure of electromagnetic sucker comprising a sucker, a base, an intermediate plate and a solenoid in the form of a knockdown structure for the highest strength and precision and for even distribution of magnet force for the highest magnet attraction by using of the intermediate plate.

Claims

1. A structure of electromagnetic sucker comprising a sucker, a base, an intermediate plate and a solenoid, in which the sucker is composed of a plurality of convex and concave rectangular iron sheets separated by non-magnetic copper alloy and connected together with pressure plates at two lateral sides, the convex rectangular iron sheet is adhered with a pad at the bottom of each lateral side, the base an 0-shaped recession for holding of the solenoid, and has a core in the middle, the intermediate plate is a magnetic square plate placed above the core, and the sucker is secured to the top of the base in a manner that the convex iron sheet keeps contact with the intermediate plate and the concave iron sheet has two lateral sides to keep contact with the base to form a magnetic field with attraction force;

and characterized by the tight assembly of the sucker by means of welding at high temperature.