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US4282181A Expired / Lapsed US ⏱️ 0.0 years remaining

Accelerated corrosion test apparatus

Assignee: KEYSTONE CARBON COMPANY A PA CORP
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Filing: 1978-12-11
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Granted: 1981-08-04
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Expires: 1998-12-11
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Abstract

Abstract An apparatus for the accelerated testing of the corrosion resistance of a plurality of parts in an isolated environment is disclosed including a horizontally disposed support bar from which the parts to be tested depend. A reservoir of corrosive liquid media is located vertically below the support bar and a drying zone is located above the reservoir wherein the temperature is controlled within plus or minus 10° C. The test unit is operated by reciprocally driving the support bar such that when the bar is in its lowermost position the parts are immersed in liquid corrosive media and when the bar is in its uppermost position the parts are in the temperature controlled drying zone. Controls are also provided to selectively retain the parts in the corrosive media and in the drying zone for predetermined, repetitive periods of time.

Inventors

  • 👤 Danny A. Pierce

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-29 23:22
CPC Classifications
G; G01; G01N; G01N17/00

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 253 words
In an apparatus for accelerated testing of the corrosion resistance of a plurality of parts comprising: a support bar disposed substantially in the horizontal direction, means connected to the support bar for individually supporting each part to be tested in a position depending downwardly from the support bar, the supporting means being substantially corrosion resistant, a reservoir for holding a liquid corrosive media, the reservoir located vertically below the support bar and sized sufficient to allow immersion of each part depending from the support bar on the supporting means, the reservoir being substantially corrosion resistant, and means for repetitively raising and lowering the support bar in a vertical plane, while the support bar retains its horizontal disposition, such that all supported parts are immersed in the corrosive media for the same period of time each instance that the bar is moved to its lowermost position; the improvement comprising a drying zone located vertically above the reservoir, means for maintaining an elevated temperature within a range of from room temperature to about 75° C., in the drying zone, said temperature being controlled to within plus or minus 10° C. with a silicon coated heating element mounted on the inside surface, with respect to the test environment, of a stainless steel reflector, means for retaining all supported parts completely within the drying zone each instance that the support bar is moved to its uppermost position, and a housing, at least partially transparent, for isolating the test environment including the drying zone from the ambient surroundings.
Claim 2
Dependent Claim 253 words
In an apparatus for accelerated testing of the corrosion resistance of a plurality of parts comprising: a support bar disposed substantially in the horizontal direction, means connected to the support bar for individually supporting each part to be tested in a position depending downwardly from the support bar, the supporting means being substantially corrosion resistant, a reservoir for holding a liquid corrosive media, the reservoir located vertically below the support bar and sized sufficient to allow immersion of each part depending from the support bar on the supporting means, the reservoir being substantially corrosion resistant, and means for repetitively raising and lowering the support bar in a vertical plane, while the support bar retains its horizontal disposition, such that all supported parts are immersed in the corrosive media for the same period of time each instance that the bar is moved to its lowermost position; the improvement comprising a drying zone located vertically above the reservoir, means for maintaining an elevated temperature within a range of from room temperature to about 75° C., in the drying zone, said temperature being controlled to within plus or minus 10° C. with a silicon coated heating element mounted on the inside surface, with respect to the test environment, of a stainless steel reflector, means for retaining all supported parts completely within the drying zone each instance that the support bar is moved to its uppermost position, and a housing, at least partially transparent, for isolating the test environment including the drying zone from the ambient surroundings.

References Cited (Backward Citations)

US3116977A Cited
US3936273A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1984-08-03 1985-02-02 1985-08-04 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1988-08-03 1989-02-02 1989-08-04 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1992-08-03 1993-02-02 1993-08-04 $7700.00 Window Closed / Lapsed

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