Damper for a ventilation turbine
Description
FIG. 1 is a top plan view of a damper for a ventilation turbine showing my new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a side elevational view thereof, with both side views being identical;
FIG. 4 is a cross-sectional view thereof, taken in the plane represented by lines 4--4 in FIG. 1;
FIG. 5 is a rear elevational view thereof; and,
FIG. 6 is a bottom plan view thereof.
Referenced Cited
U.S. Patent Documents
D119194 | February 1940 | Dressler |
D189559 | January 1961 | Breidert |
D210017 | January 1968 | Morrison et al. |
D216795 | March 1970 | Field |
D277026 | January 1, 1985 | Waltz et al. |
D277028 | January 1, 1985 | Waltz et al. |
4248613 | February 3, 1981 | Linhart |
4506655 | March 26, 1985 | Kuechler |
5064089 | November 12, 1991 | Schultz |
5196040 | March 23, 1993 | Malloy et al. |
Patent History
Patent number: D347471
Type: Grant
Filed: Aug 5, 1991
Date of Patent: May 31, 1994
Inventor: Carlos DeHerrera (Arlington, TX)
Primary Examiner: A. Hugo Word
Assistant Examiner: R. Seifert
Attorney: Charles W. McHugh
Application Number: 7/740,217
Type: Grant
Filed: Aug 5, 1991
Date of Patent: May 31, 1994
Inventor: Carlos DeHerrera (Arlington, TX)
Primary Examiner: A. Hugo Word
Assistant Examiner: R. Seifert
Attorney: Charles W. McHugh
Application Number: 7/740,217
Classifications
Current U.S. Class:
Roof Or Chimney (D23/373)