Expandable core element for use with an injection molding system
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Description
FIG. 1 is a perspective view from above of the expandable core element for use with an injection molding system of our invention in the relaxed, expanded, non-molding position;
FIG. 2 is a perspective view from above of our invention of FIG. 1 in a closed, molding position;
FIG. 3 is a top plan view of our design of FIG. 1;
FIG. 4 is a bottom plan view of our design of FIG. 1; and,
FIG. 5 is a side plan view of our design of FIG. 1, the other side, front and back plan views being the same.
Referenced Cited
U.S. Patent Documents
D204019 | March 1966 | Adams |
1421601 | July 1922 | Speck |
1642947 | September 1927 | Fischer |
4130264 | December 19, 1978 | Schroer |
4578028 | March 25, 1986 | Dirksing et al. |
4643658 | February 17, 1987 | Gordon |
4919608 | April 24, 1990 | Catalanotti et al. |
4938679 | July 3, 1990 | Pietrorazio |
4956142 | September 11, 1990 | Mangone, Jr. |
5090888 | February 25, 1992 | Pfannkuchen |
Patent History
Patent number: D356320
Type: Grant
Filed: Dec 10, 1993
Date of Patent: Mar 14, 1995
Assignee: Roehr Tool Corporation (Hudson, MA)
Inventors: Paul Catalanotti (West Newton, MA), Sassan Tarahomi (North Chelmsford, MA)
Primary Examiner: Alan P. Douglas
Assistant Examiner: Antoine D. Davis
Attorney: Richard P. Crowley
Application Number: 0/16,294
Type: Grant
Filed: Dec 10, 1993
Date of Patent: Mar 14, 1995
Assignee: Roehr Tool Corporation (Hudson, MA)
Inventors: Paul Catalanotti (West Newton, MA), Sassan Tarahomi (North Chelmsford, MA)
Primary Examiner: Alan P. Douglas
Assistant Examiner: Antoine D. Davis
Attorney: Richard P. Crowley
Application Number: 0/16,294
Classifications