US4889311A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molding apparatus with improved ejector pin
Assignee: Outboard Marine Corp
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Filing: 1988-08-10
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Granted: 1989-12-26
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Expires: 2008-08-10
Abstract
Abstract A molding aperture comprising a mold piece having therein an aperture and including a surface at least partially defining a mold cavity, the mold piece being made of a first material, an ejector pin slideably housed in the aperture and made of second material substantially softer than the first material, and a mechanism for moving the ejector pin relative to the mold piece so that the ejector pin separates a molded part from the mold piece surface.
Inventors
- 👤 Willie R. Anglin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 23:12
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/40; B29C45/4005; B29C45/401; B22; B22D; B22D17/00; B22D17/20; B22D17/22; B22D17/2236; B29C33/00; B29C33/44; B29C33/442
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
76 words
A molding apparatus comprising a mold piece having therein an aperture and including a surface at least partially defining a mold cavity, said mold piece being made of a first material, an ejector pin slideably housed in said aperture and made of second material substantially softer than said first material, and means for moving said ejector pin relative to said mold piece so that said ejector pin separates a molded part from said mold piece surface.
Claim 2
Dependent Claim
76 words
A molding apparatus comprising a mold piece having therein an aperture and including a surface at least partially defining a mold cavity, said mold piece being made of a first material, an ejector pin slideably housed in said aperture and made of second material substantially softer than said first material, and means for moving said ejector pin relative to said mold piece so that said ejector pin separates a molded part from said mold piece surface.
Claim 3
Dependent Claim
16 words
An apparatus as set forth in claim 1 wherein said mold piece is made of metal.
Claim 4
Dependent Claim
18 words
An apparatus as set forth in claim 1 wherein said mold piece is made of an aluminum alloy.
Claim 5
Dependent Claim
16 words
An apparatus as set forth in claim 1 wherein said ejector pin is made of plastic.
Claim 6
Dependent Claim
20 words
An apparatus as set forth in claim 1 wherein said ejector pin is made of a material having natural lubricity.
Claim 7
Dependent Claim
18 words
An apparatus as set forth in claim 1 wherein said ejector pin is made of a wear-resistant material.
Claim 8
Dependent Claim
56 words
A molding apparatus comprising a mold piece including a surface at least partially defining a mold cavity, said mold piece being made of a first material, and means including an ejector pin for separating a molded part from said mold piece surface, said ejector pin being made of second material substantially softer than said first material.
Claim 9
Dependent Claim
56 words
A molding apparatus comprising a mold piece including a surface at least partially defining a mold cavity, said mold piece being made of a first material, and means including an ejector pin for separating a molded part from said mold piece surface, said ejector pin being made of second material substantially softer than said first material.
Claim 10
Dependent Claim
16 words
An apparatus as set forth in claim 7 wherein said mold piece is made of metal.
Claim 11
Dependent Claim
18 words
An apparatus as set forth in claim 7 wherein said mold piece is made of an aluminum alloy.
Claim 12
Dependent Claim
16 words
An apparatus as set forth in claim 7 wherein said ejector pin is made of plastic.
Claim 13
Dependent Claim
20 words
An apparatus as set forth in claim 7 wherein said ejector pin is made of a material having natural lubricity.
Claim 14
Dependent Claim
18 words
An apparatus as set forth in claim 7 wherein said ejector pin is made of a wear-resistant material.
Claim 15
Dependent Claim
85 words
A molding apparatus comprising a mold piece having therein an aperture and including a surface at least partially defining a mold cavity, said mold piece being made of an aluminum alloy, an ejector pin slideably housed in said aperture and made of a plastic which is substantially softer than said alloy, which has natural lubricity and which is wear-resistant, and means for moving said ejector pin relative to said mold piece so that said ejector pin separates a molded part from said mold piece surface.
Claim 16
Dependent Claim
85 words
A molding apparatus comprising a mold piece having therein an aperture and including a surface at least partially defining a mold cavity, said mold piece being made of an aluminum alloy, an ejector pin slideably housed in said aperture and made of a plastic which is substantially softer than said alloy, which has natural lubricity and which is wear-resistant, and means for moving said ejector pin relative to said mold piece so that said ejector pin separates a molded part from said mold piece surface.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-12-25 | 1993-06-26 | 1993-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-12-25 | 1997-06-26 | 1997-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-12-25 | 2001-06-26 | 2001-12-26 | $7700.00 | Window Closed / Lapsed |