COREBOX AND SEAL

• US 3,661,197 A
• Filed: 02/09/1970
• Issued: 05/09/1972
• Est. Priority Date: 02/09/1970
• Status: Expired due to Term

• Current Assignee: Edwin F. Peterson
• Original Assignee: Edwin F. Peterson
• Inventors: Peterson, Edwin F.
• Primary Examiner(s): Overholser, J. Spencer
• Assistant Examiner(s): Brown, John S.
• Application Number:
  US05/009,899
• Time in Patent Office: 820 Days
• Field of Search: 164/228,229,230,233 49/486,488,489,490,493,498,475,477,485,497,499,467-472 277/215,226,235B
• US Class Current: 164/228
• CPC Class Codes: B22C 7/062 Sealing means
• CPC Class Codes: Y10S 277/921 Closure or weather strip seal

Abstract

A seal for surrounding the cavity in a core box made up of a pair of mating members meeting at an interface in which a cavitysurrounding channel of greater than semicircular section is formed in but one of the members. The channel carries coextensively therewith a tubular elastomer seal of somewhat greater diameter than the channel so as to initially project from the channel in parabolic fashion, the parabolic portion being deformed into the channel as the two members are brought tightly together.

Claims

1. A core box structure and seal means therefor including a pair of core box members respectively having confronting faces meeting at a parting plane, one of said members having therein an elongated channel of C-shaped cross section and opening at said one member face as an elongated slot, and an elongated tubular seal of elastomer material and of circular cross section received in the channel so that a segment of the seal projects initially through the slot to be engaged and compressed by the face of the opposing member, characterized in that the cross section of the channel of a circle wherein the depth of the channel as measured from said one member face is in the order of between 60 and 80 percent of the channel diameter, and the diameter of the seal exceeds that of the channel by between 5 and 20 percent of the latter diameter so that the segment of the seal that projects through the slot initially assumes and reassumes a parabolic shape before and after compression and release by said opposing member.

2. The invention defined in claim 1, further characterized in that the thickness of the seal is uniform and is in the range of 15 to 30 percent of the seal diameter.

3. A core box structure and seal means therefor including a pair of core box members respectively having confronting faces meeting at a parting plane, one of said members having therein an elongated channel of C-shaped cross section and opening at said one member face as an elongated slot, and an elongated tubular seal of elastomer material and of circular cross section received in the channel so that a segment of the seal projects initially through the slot to be engaged and compressed by the face of the opposing member, characterized in that the cross section of the channel of a circle wherein the depth of the channel as measured from said one member face is in the order of betweeN 60 and 80 percent of the channel diameter, and the diameter of the seal exceeds that of the channel by between 10 and 15 percent of the latter diameter so that the segment of the seal that projects through the slot initially assumes and reassumes a parabolic shape before and after compression and release by said opposing member.

4. The invention defined in claim 3, further characterized in that the thickness of the seal is uniform and is in the range of 15 to 25 percent of the seal diameter.

5. A core box structure and seal means therefor including a pair of core box members respectively having confronting faces meeting at a parting plane, one of said members having therein an elongated channel of C-shaped cross section and opening at said one member face as an elongated slot, and an elongated tubular seal of elastomer material and of circular cross section received in the channel so that a segment of the seal projects initially through the slot to be engaged and compressed by the face of the opposing member, characterized in that the cross section of the channel of a circle wherein the depth of the channel as measured from said one member face is in the order of 60 percent of the channel diameter, and the diameter of the seal exceeds that of the channel by about 15 percent of the latter diameter so that the segment of the seal that projects through the slot initially assumes and reassumes a parabolic shape before and after compression and release by said opposing member.

6. A core box structure and seal means therefor including a pair of core box members respectively having confronting faces meeting at a parting plane, one of said members having therein an elongated channel of C-shaped cross section and opening at said one member face as an elongated slot, and an elongated tubular seal of elastomer material and of circular cross section received in the channel so that a segment of the seal projects initially through the slot to be engaged and compressed by the face of the opposing member, characterized in that the cross section of the channel of a circle wherein the depth of the channel as measured from said one member face is in the order of 80 percent of the channel diameter, and the diameter of the seal exceeds that of the channel by about 10 percent of the latter diameter so that the segment of the seal that projects through the slot initially assumes and reassumes a parabolic shape before and after compression and release by said opposing member.