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EP0147094A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Vacuum suction device

Assignee: Citizen Watch Co Ltd
•
Filing: 1984-12-04
•
Granted: —
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Expires: 2004-12-04
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Abstract

Abstract A vacuum suction device comprises a vacuum suction plate 11 formed by baking a porous material and having a flat suction face 11a for holding a workpiece 10 by suction; a base 14 abutting on the bottom of the suction plate 11 for supporting the suction plate 11 and having a plurality of suction grooves 15, 16 and 17 in a part of the surface of the base 14 abutting on the bottom of the suction plate 11, the suction grooves 15, 16 and 17 being coupled to a pipe 18 of the base 14; an intake device 25 coupled to the pipe 18 of the base 14; a peripheral member 12 formed of an airtight material for encircling the suction plate 11; and means for preventing grinding liquid from getting into the vacuum suction device through the suction grooves 15, 16 and 17. The preventing means prevents reduction in suction force applied by the intake device 25 acting on the workpiece 10.

Inventors

  • 👤 Isao Koyama
  • 👤 Toshikazu Hatsuse

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-01 03:28
CPC Classifications
B; B24; B24B; B24B37/00; B24B37/27; B24B37/30; B24B41/00; B24B41/06; B24B41/068; B24B7/00; B24B7/20; B24B7/22; B24B7/228; B25; B25B; B25B11/00; B25B11/005; H; H10; H10P; H10P72/00; H10P72/70; H10P72/78

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 138 words
A vacuum suction device comprising a vacuum auction plate formed by baking a porous material and having a flat auction face for holding a workpiece by suction, a base abutting on the bottom of said vacuum suction plate for supporting said vacuum suction plate and having a plurality of suction grooves in a part of the surface abutting on the bottom of said suction plate, said suction grooves being coupled to a pipe of said base, an intake device coupled to the pipe of said base, and a peripheral member formed of an airtight material for encircling said suction plate, characterized in that there is provided means for preventing a grinding liquid from getting into said vacuum suction device through said suction grooves, thereby preventing reduction in suction force applied by said intake device acting on said workpiece.
Claim 2
Dependent Claim 138 words
A vacuum suction device comprising a vacuum auction plate formed by baking a porous material and having a flat auction face for holding a workpiece by suction, a base abutting on the bottom of said vacuum suction plate for supporting said vacuum suction plate and having a plurality of suction grooves in a part of the surface abutting on the bottom of said suction plate, said suction grooves being coupled to a pipe of said base, an intake device coupled to the pipe of said base, and a peripheral member formed of an airtight material for encircling said suction plate, characterized in that there is provided means for preventing a grinding liquid from getting into said vacuum suction device through said suction grooves, thereby preventing reduction in suction force applied by said intake device acting on said workpiece.
Claim 3
Dependent Claim 121 words
A vacuum suction device according to claim 1 wherein said preventing means permits the suction face to substantially correspond to a workpiece in shape and is prepared by coating a mixture around the periphery of said suction plate so that the upper end of the periphery of said suction plate overlaps the bottom end of the workpiece, said mixture being made by mixing a bonding agent and an inorganic material having a grain size large enough to enter each of pores of said porous material and similar to said porous material in physical property, thereby preventing the suction plate from being exposed to the grinding liquid and preventing reduction in suction force applied by said intake device acting on said workpiece.
Claim 4
Dependent Claim 83 words
A vacuum suction device according to claim 1 wherein said preventing means has water drawing grooves provided in a portion of said peripheral member encircling the suction plate, and a second intake device of another system coupled to said water drawing grooves so that water is drawn by said second intake device before the grinding liquid reaches said suction grooves abutting on the bottom of the suction plate, thereby preventing reduction in suction force applied by the intake device acting on the workpiece.
Claim 5
Dependent Claim 17 words
A vacuum suction device of claim 3 wherein said peripheral member is built integral with said base.

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