Rotary spool valve
Description
FIG. 1 is a top perspective view of a rotary spool valve showing our new design;
FIG. 2 is a top plan view thereof;
FIG. 3 is a right side elevational view thereof;
FIG. 4 is a left side elevational view thereof;
FIG. 5 is a right end elevational view thereof;
FIG. 6 is a bottom plan view thereof; and
FIG. 7 is a left side elevational view thereof.
Referenced Cited
U.S. Patent Documents
| D24344 | May 1895 | Schafer |
| D30956 | June 1899 | Cliff |
| D156175 | November 1949 | Rosenthal |
| D162690 | March 1951 | Rosenthal |
| D171428 | February 1954 | Storie |
| D183678 | October 1958 | Brundage |
| D186646 | November 1959 | Lockett |
| D202490 | October 1965 | Bishop |
| D202686 | October 1965 | Gilmour |
| D208845 | October 1967 | Beinert |
| D216976 | March 1970 | Lee |
| D231703 | May 1974 | Grube |
| D257286 | October 7, 1980 | Folkman |
| D261547 | October 27, 1981 | Parke |
| D281349 | November 12, 1985 | Golden |
| D297355 | August 23, 1988 | Wirth |
| 2783094 | February 1957 | Storie |
| 3448961 | June 1969 | Enssle |
Patent History
Patent number: D320257
Type: Grant
Filed: Jan 23, 1989
Date of Patent: Sep 24, 1991
Assignee: A-Dec, Inc. (Newberg, OR)
Inventors: George K. Austin, Jr. (Newberg, OR), Charles A. Nelson, Jr. (Tigard, OR)
Primary Examiner: James R. Largen
Assistant Examiner: Demetrius Reynolds
Law Firm: Klarquist, Sparkman, Campbell, Leigh & Whinston
Application Number: 7/299,740
Type: Grant
Filed: Jan 23, 1989
Date of Patent: Sep 24, 1991
Assignee: A-Dec, Inc. (Newberg, OR)
Inventors: George K. Austin, Jr. (Newberg, OR), Charles A. Nelson, Jr. (Tigard, OR)
Primary Examiner: James R. Largen
Assistant Examiner: Demetrius Reynolds
Law Firm: Klarquist, Sparkman, Campbell, Leigh & Whinston
Application Number: 7/299,740
Classifications