Patent US4537485A successfully refreshed from Google Patents.
Patent US5142109A successfully refreshed from Google Patents.
US5142109A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Puncture-resistant mat for pressure-actuated switches
Assignee: Tapeswitch Corp of America
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Filing: 1990-09-13
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Granted: 1992-08-25
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Expires: 2010-09-13
Abstract
Abstract A protective mat for use with pressure-actuated switching devices having a moisture-resistant, isolated switching chamber protected by a puncture-resistant, protective layer which disperses forces applied to the mat.
Inventors
- 👤 John O'Meara, Jr.
- 👤 Edward W. Duhon
- 👤 Thomas Polistina
- 👤 Robert E. Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:27
CPC Classifications
H; H01; H01H; H01H3/00; H01H3/02; H01H3/14; H01H3/141; H01H2003/147; H01H3/22; H01H3/24
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
134 words
A protective mat comprising: a fluid-tight first chamber; having at least a top wall and a bottom wall; a fluid-tight second chamber having a top layer and a bottom layer, said second chamber disposed proximate said first chamber and having a common wall therewith; a flexible, protective layer disposed within said first chamber; a pressure-actuated device disposed outside said first and second chambers which generates a signal in response to a force applied to said second chamber; and a conduit connecting said second chamber with said pressure-actuated device, and wherein said protective layer is puncture-resistant such that said protective layer is not punctured upon impact by a dart weighing about 21/4 pounds, with a point having a diameter of about 0.10 inches dropped from a still position approximately 3 feet above said protective layer.
Claim 2
Dependent Claim
134 words
A protective mat comprising: a fluid-tight first chamber; having at least a top wall and a bottom wall; a fluid-tight second chamber having a top layer and a bottom layer, said second chamber disposed proximate said first chamber and having a common wall therewith; a flexible, protective layer disposed within said first chamber; a pressure-actuated device disposed outside said first and second chambers which generates a signal in response to a force applied to said second chamber; and a conduit connecting said second chamber with said pressure-actuated device, and wherein said protective layer is puncture-resistant such that said protective layer is not punctured upon impact by a dart weighing about 21/4 pounds, with a point having a diameter of about 0.10 inches dropped from a still position approximately 3 feet above said protective layer.
Claim 3
Dependent Claim
15 words
A protective mat according to claim 1 wherein said top wall comprises a rubber elastomer.
Claim 4
Dependent Claim
26 words
A protective mat according to claim 1 wherein said bottom wall and said top layer are defined by a single bladder layer comprising a rubber elastomer.
Claim 5
Dependent Claim
15 words
A protective mat according to claim 1 wherein said bottom layer comprises a rubber elastomer.
Claim 6
Dependent Claim
72 words
A protective mat according to claim 1 wherein said protective layer comprises a bottom surface and a top surface, and said protective layer is deformation-resistant such that said bottom surface does not receive a dent exceeding about 0.05 inches upon impact of a dart weighing bout 21/4 pounds, with a point having a diameter of about 0.10 inches which is dropped from a still position approximately 8 feet above said top surface.
Claim 7
Dependent Claim
16 words
A protective mat according to claim 1 wherein said protective layer comprises a plurality of layers.
Claim 8
Dependent Claim
20 words
A protective mat according to claim 5 wherein said bottom surface does not receive a dent exceeding about 0.025 inches.
Claim 9
Dependent Claim
16 words
A protective mat according to claim 1 wherein said protective layer comprises a plurality of layers.
Claim 10
Dependent Claim
15 words
A protective mat according to claim 1 wherein said pressure-actuated device comprises a pneumatically-operated switch.
Claim 11
Dependent Claim
18 words
A protective mat according to claim 1 wherein a carbon impregnated elastomer is disposed within said second chamber.
Claim 12
Dependent Claim
98 words
A protective mat comprising: a fluid-tight switching chamber having at least a top wall and a bottom wall; a pressure-actuated switching device disposed at least partially within said switching chamber; a protective layer disposed proximate said switching chamber, and covering and protecting at least a portion of said pressure-actuated switching device from impact, wherein said protective layer is puncture-resistant such that said protective layer is not punctured upon impact by a dart weighing about 21/4 pounds, with a point having a diameter of about 0.10 inches dropped from a still position approximately 3 feet above said protective layer.
Claim 13
Dependent Claim
98 words
A protective mat comprising: a fluid-tight switching chamber having at least a top wall and a bottom wall; a pressure-actuated switching device disposed at least partially within said switching chamber; a protective layer disposed proximate said switching chamber, and covering and protecting at least a portion of said pressure-actuated switching device from impact, wherein said protective layer is puncture-resistant such that said protective layer is not punctured upon impact by a dart weighing about 21/4 pounds, with a point having a diameter of about 0.10 inches dropped from a still position approximately 3 feet above said protective layer.
Claim 14
Dependent Claim
22 words
A protective mat according to claim 11 further comprising a wear-resistant top layer comprising a rubber elastomer disposed above said protective layer.
Claim 15
Dependent Claim
15 words
A protective mat according to claim 11 wherein said top wall comprises a rubber elastomer.
Claim 16
Dependent Claim
15 words
A protective mat according to claim 11 wherein said bottom wall comprises a rubber elastomer.
Claim 17
Dependent Claim
72 words
A protective mat according to claim 11 wherein said protective layer comprises a bottom surface and a top surface, and said protective layer is deformation-resistant such that said bottom surface does not receive a dent exceeding about 0.05 inches upon impact of a dart weighing about 21/4 pounds, with a point having a diameter of about 0.10 inches which is dropped from a still position approximately 8 feet above said top surface.
Claim 18
Dependent Claim
16 words
A protective mat according to claim 11 wherein said protective layer comprises a plurality of layers.
Claim 19
Dependent Claim
20 words
A protective mat according to claim 15 wherein said bottom surface does not receive a dent exceeding about 0.025 inches.
Claim 20
Dependent Claim
18 words
A protective mat according to claim 11 wherein said pressure-actuated switching device comprises at least one electrical switch.
Claim 21
Dependent Claim
16 words
A protective mat according to claim 11 wherein said pressure-actuated switching device comprises a carbon-impregnated elastomer.
Claim 22
Dependent Claim
16 words
A protective mat according to claim 11 wherein said protective layer comprises a plurality of layers.
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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) | 1995-08-25 | 1996-02-24 | 1996-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-08-25 | 2000-02-24 | 2000-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-08-25 | 2004-02-24 | 2004-08-25 | $7700.00 | Window Closed / Lapsed |