Polishing head for plate materials in granite, hard stone or ceramic with abrasive segments having continuous oscillating tangential motion

Patent 6273799 Issued on August 14, 2001. Estimated Expiration Date:

January 18, 2020. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

Grinding head for surfacing and polishing stone, marbles and other hard materials
Patent #: 4965965
Issued on: 10/30/1990
Inventor: Wallin, et al.

Rotating head having oscillating blocks for leveling and polishing surfaces of granite, ceramic or marble Patent #: 5161331
Issued on: 11/10/1992
Inventor: Zambon

Inventor

Pedrini, Luigi

Assignee

Pedrini, S.p.A.

Application

No. 423812 filed on 01/18/2000

US Classes:

451/159, Oscillating451/350Floor surfacing machine

Examiners

Primary: Rose, Robert A.

Foreign Patent References

3601636 DE 07/13/1987
437831A EP. 07/13/1991
7127657 JP 08/13/1982

International Class

B24B 007/18

Foreign Application Priority Data

1997-04-14 IT

Abstract

A polishing head comprises a casing with abrasive segments attached thereto made to oscillate on radial shafts driven by a ring with vertical eccentric rotary motion. The ring is coupled to a first eccentric and to a crown gear is fixed to the casing while a pinion is coupled with rotational motion to a second eccentric connected to the structure of the machine. A plurality of pins are mounted on eccentric planetary gears coupled with rotational motion to the ring and to the body of the head with a further pair of crown and pinion gears provided in which the first crown gear is rigidly connected to a second pinion and rotates with it on the second eccentric. The first pinion is rigidly connected to the said first eccentric, concentrically with the axis of the head and the second crown gear is rigidly connected to the housing of the polishing head concentrically with the axis of the head.