Section of a shaftless spiral conveyor
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Description
The sole FIGURE is a perspective view of a section of a shaftless spiral conveyor showing my new design, it being understood that the conveyor is of indeterminate length.
Referenced Cited
U.S. Patent Documents
Foreign Patent Documents
| D292938 | November 24, 1987 | Tarlton et al. |
| D296489 | June 28, 1988 | Nair |
| 705365 | July 1902 | Law |
| 961340 | June 1910 | Cormack |
| 973921 | October 1910 | Dodge |
| 3565226 | February 1971 | Winchester |
| 3976176 | August 24, 1976 | Kurtz et al. |
| 4269302 | May 26, 1981 | Garvey |
| 294187 | April 1965 | NLX |
Patent History
Patent number: D323414
Type: Grant
Filed: May 10, 1989
Date of Patent: Jan 21, 1992
Assignee: Spirac Engineering AB (Malmo)
Inventor: Richard L. Bruke (Bunkeflostrand)
Primary Examiner: Wallace R. Burke
Assistant Examiner: H. Baynham
Law Firm: Ladas & Parry
Application Number: 7/350,023
Type: Grant
Filed: May 10, 1989
Date of Patent: Jan 21, 1992
Assignee: Spirac Engineering AB (Malmo)
Inventor: Richard L. Bruke (Bunkeflostrand)
Primary Examiner: Wallace R. Burke
Assistant Examiner: H. Baynham
Law Firm: Ladas & Parry
Application Number: 7/350,023
Classifications
Current U.S. Class:
Belt Or Roller Conveyor (D34/29)
