US4573567A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conveyor housing access port
Assignee: Martin Engineering Co
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Filing: 1983-02-28
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Granted: 1986-03-04
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Expires: 2003-02-28
Abstract
Abstract The invention relates to a conveyor belt housing access port and elastic closure therefor, for use on a conveyor belt cleaner installation wherein hinges, catches, gaskets and the like are completely eliminated. The cover is retained in place by inherent tension and includes securing means which may incorporate a magnetic force, or interengaging means between the cover and a continuous rim about the opening. The securement may involve an enlargement of the rim such as a ledge, or a flange and an interengaged groove, or flange on the cover operatively related to such enlargement.
Inventors
- 👤 Robert T. Swinderman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:48
CPC Classifications
B; B65; B65G; B65G21/00; B65G45/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
129 words
A conveyor housing access port including an aperture defined in a conveyor housing wall, an upstanding flange disposed around the perimeter of said aperture, an elastomeric closure member defining a groove in the underside thereof around the entire periphery of said closure member, said groove adapted to receive said upstanding flange so as to effect a seal about the entire periphery of said aperture whereby said closure member is peelably removable, either partially or totally, from any point on the periphery thereof and acts to cover and seal said aperture around substantially its entire periphery to thereby prevent the flow of material into or out of said housing while, at the same time affording a partial exposure of the aperture for inspection without necessitating removal of the entire cover.
Claim 2
Dependent Claim
129 words
A conveyor housing access port including an aperture defined in a conveyor housing wall, an upstanding flange disposed around the perimeter of said aperture, an elastomeric closure member defining a groove in the underside thereof around the entire periphery of said closure member, said groove adapted to receive said upstanding flange so as to effect a seal about the entire periphery of said aperture whereby said closure member is peelably removable, either partially or totally, from any point on the periphery thereof and acts to cover and seal said aperture around substantially its entire periphery to thereby prevent the flow of material into or out of said housing while, at the same time affording a partial exposure of the aperture for inspection without necessitating removal of the entire cover.
Claim 3
Dependent Claim
25 words
A conveyor housing access port as set forth in claim 1 wherein said closure member is molded from an elastomeric material inert to corrosive atmosphere.
Claim 4
Dependent Claim
28 words
A conveyor housing access port as set forth in claim 1 wherein said flange has a continuous bulb end and said groove has a continuous correspondingly shaped pocket.
Claim 5
Dependent Claim
27 words
A conveyor housing access port as set forth in claim 1 wherein said groove has one or more embedded metal spring clips adapted to grip said flange.
Claim 6
Dependent Claim
21 words
A conveyor housing access port as set forth in claim 1 wherein said closure member has a metal reinforcement embedded therein.
References Cited (Backward Citations)
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-03-03 | 1989-09-02 | 1990-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-03 | 1993-09-02 | 1994-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-03 | 1997-09-02 | 1998-03-04 | $7700.00 | Window Closed / Lapsed |