US4776209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Leakage detector
Assignee: W.L. Gore and Associates Inc
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Filing: 1987-07-13
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Granted: 1988-10-11
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Expires: 2007-07-13
Abstract
Abstract An apparatus and method for testing for gas leaks in waterproof gloves and glove inserts by applying gas under controlled pressure into a confined glove or insert and measuring bubbling or lack thereof in a suitable reservoir of liquid. The glove is not wet by liquid.
Inventors
- 👤 Kenneth A. Patchel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:27
CPC Classifications
G; G01; G01M; G01M3/00; G01M3/02; G01M3/04; G01M3/06; G01M3/10; G01M3/103
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
208 words
An apparatus for testing leakage of gas through the waterproof layer of a waterproof hollow layered article comprising: (a) a cylindrical tube for containing and confining said article, having an inwardly beveled top edge and a raised bulkhead bottom closure to isolate liquid from said tube, said bulkhead bottom closure having an aperture for passage of a gas; (b) a solid tapered conical plug configured to conform closely to the bevel of and to close the opening of said tube and having valved means for passage of a gas through said plug; (c) an exit tube for passage of a gas affixed to said aperture in said bulkhead bottom closure, and having a check valve; (d) a container surrounding the bottom of said cylindrical tube containing a sufficient quantity of liquid to immerse the end of said gas exit tube in said liquid to the extent that the passage of gas bubbles from the end of said exit tube is readily observed; (e) a clamping mechanism for raising, lowering, and applying pressure downwardly to the top of said plug; (f) a support stand for mounting said clamping mechanism, said tube, said plug, and said container; and (g) support means to hold said tube in position in said container.
Claim 2
Independent Claim
208 words
An apparatus for testing leakage of gas through the waterproof layer of a waterproof hollow layered article comprising: (a) a cylindrical tube for containing and confining said article, having an inwardly beveled top edge and a raised bulkhead bottom closure to isolate liquid from said tube, said bulkhead bottom closure having an aperture for passage of a gas; (b) a solid tapered conical plug configured to conform closely to the bevel of and to close the opening of said tube and having valved means for passage of a gas through said plug; (c) an exit tube for passage of a gas affixed to said aperture in said bulkhead bottom closure, and having a check valve; (d) a container surrounding the bottom of said cylindrical tube containing a sufficient quantity of liquid to immerse the end of said gas exit tube in said liquid to the extent that the passage of gas bubbles from the end of said exit tube is readily observed; (e) a clamping mechanism for raising, lowering, and applying pressure downwardly to the top of said plug; (f) a support stand for mounting said clamping mechanism, said tube, said plug, and said container; and (g) support means to hold said tube in position in said container.
Claim 3
Dependent Claim
12 words
An apparatus of claim 1 wherein the hollow article is waterproof handwear.
Claim 4
Dependent Claim
11 words
An apparatus of claim 2 wherein the handwear is a glove.
Claim 5
Dependent Claim
15 words
An apparatus of claim 3, wherein the gas is air and the liquid is water.
Claim 6
Dependent Claim
18 words
An apparatus of claim 1 wherein the waterproof layer of a waterproof hollow article is a glove insert.
Claim 7
Dependent Claim
15 words
An apparatus of claim 5, wherein the gas is air and the liquid is water.
Claim 8
Dependent Claim
15 words
An apparatus of claim 1 wherein the gas is air and the liquid is water.
Claim 9
Dependent Claim
164 words
A process for testing for leakage of gas through the waterproof layer of a hollow article, comprising the steps of: (a) inserting said hollow article into a cylindrical tube having an inwardly beveled top edge, a gas exit tube at the opposite end, said tube end and gas exit tube being covered by a liquid; (b) inserting a valved tapered plug into an opening in said article and sealing said article against the bevel of the cylindrical tube; (c) pressurizing said article in the cylindrical tube to about two to five pounds per square inch gauge gas pressure; (d) after complete pressurization of said article, waiting five to ten seconds for bubbling to cease in the liquid covering the end of the gas exit tube; (e) observing if bubbling at the end of the gas exit tube ceases following completion of pressurization of said article; (f) releasing the gas pressure in said article, removing said plug, and removing said article from said cylindrical tube.
Claim 10
Dependent Claim
164 words
A process for testing for leakage of gas through the waterproof layer of a hollow article, comprising the steps of: (a) inserting said hollow article into a cylindrical tube having an inwardly beveled top edge, a gas exit tube at the opposite end, said tube end and gas exit tube being covered by a liquid; (b) inserting a valved tapered plug into an opening in said article and sealing said article against the bevel of the cylindrical tube; (c) pressurizing said article in the cylindrical tube to about two to five pounds per square inch gauge gas pressure; (d) after complete pressurization of said article, waiting five to ten seconds for bubbling to cease in the liquid covering the end of the gas exit tube; (e) observing if bubbling at the end of the gas exit tube ceases following completion of pressurization of said article; (f) releasing the gas pressure in said article, removing said plug, and removing said article from said cylindrical tube.
Claim 11
Dependent Claim
11 words
A process of claim 8 wherein the hollow article is handwear.
Claim 12
Dependent Claim
11 words
A process of claim 9 wherein the handwear is a glove.
Claim 13
Dependent Claim
18 words
A process of claim 8 where the waterproof layer of a hollow article is a waterproof glove insert.
Claim 14
Independent Claim
189 words
An apparatus for testing leakage of gas comprising: (a) a cylindrical tube for containing and confining an article being tested, having an inwardly beveled top edge and a raised bulkhead bottom closure, said closure having an aperture therein for passage of a gas; (b) a tapered conical plug configured to conform closely to the bevel of and to close the opening of said tube, and having valved means for passage of a gas through said plug; (c) an exit tube, including a check valve, for passage of a gas affixed to said aperture in said bottom closure; (d) a container surrounding the bottom of said cylindrical tube and holding therein a sufficient quantity of liquid to immerse the end of said gas exit tube in said liquid to the extent that the passage of gas bubbles from the end of said exit tube is readily observed; (e) a clamping mechanism for applying pressure downwardly to the top of said plug; (f) a support stand for mounting said clamping mechanism, said tube, said plug, and said container; and (g) support means to hold in position said tube in said container.
Claim 15
Independent Claim
189 words
An apparatus for testing leakage of gas comprising: (a) a cylindrical tube for containing and confining an article being tested, having an inwardly beveled top edge and a raised bulkhead bottom closure, said closure having an aperture therein for passage of a gas; (b) a tapered conical plug configured to conform closely to the bevel of and to close the opening of said tube, and having valved means for passage of a gas through said plug; (c) an exit tube, including a check valve, for passage of a gas affixed to said aperture in said bottom closure; (d) a container surrounding the bottom of said cylindrical tube and holding therein a sufficient quantity of liquid to immerse the end of said gas exit tube in said liquid to the extent that the passage of gas bubbles from the end of said exit tube is readily observed; (e) a clamping mechanism for applying pressure downwardly to the top of said plug; (f) a support stand for mounting said clamping mechanism, said tube, said plug, and said container; and (g) support means to hold in position said tube in said container.
Claim 16
Dependent Claim
41 words
An apparatus of claim 12 wherein said gas is air, said liquid is water, said support stand is metal, and said support means comprise metal rods and buttons affixed to said support stand in a positioning array about said cylindrical tube.
Claim 17
Dependent Claim
12 words
An apparatus of claim 13 wherein said plug is a hard solid.
Claim 18
Dependent Claim
14 words
An apparatus of claim 13 wherein said plug is an elastic or resilient solid.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-10-11 | 1992-04-11 | 1992-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-11 | 1996-04-11 | 1996-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-11 | 2000-04-11 | 2000-10-11 | $7700.00 | Window Closed / Lapsed |