Expandable core element for use with an injection molding system

- Roehr Tool Corporation
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.
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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
Classifications