US3779081A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compression tester
Assignee: MR GASKET Co AN OH CORP
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Filing: 1972-10-30
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Granted: 1973-12-18
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Expires: 1992-10-30
Abstract
Abstract A pressure indicating gauge which utilizes a piston responsive to test pressure to move a diagonally oriented indicator along a longitudinal axis. A display having a transverse slot is located adjacent the indicator. As the diagonally oriented indicator moves longitudinally, it undergoes an apparent transverse travel along the slot, and pressure indicia adjacent the slot provide an indication of the magnitude of the test pressure.
Inventors
- 👤 N Holtzman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:18
CPC Classifications
G; G01; G01L; G01L7/00; G01L7/16
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
148 words
A compression tester comprising: means defining an elongated cylinder having a pressure inlet at one extremity; a piston movable longitudinally in said cylinder in response to test pressure developed at said pressure inlet; bias means tending to urge said piston longitudinally in a direction opposite the movement of said piston in response to said test pressure; display means carried by said first-mentioned means adjacent the extremity of said cylinder opposite said pressure inlet, and defining a viewing slot extending across said display means generally normal to the axis of said cylinder, said display means including indicia disposed along said slot; and indicator means carried by said piston and movable therewith adjacent said slot, said indicator means defIning an indicator line extending diagonally relative to said slot whereby said indicator line undergoes an apparent transverse travel along said slot upon longitudinal movement of said indicator means with said piston.
Claim 2
Dependent Claim
148 words
A compression tester comprising: means defining an elongated cylinder having a pressure inlet at one extremity; a piston movable longitudinally in said cylinder in response to test pressure developed at said pressure inlet; bias means tending to urge said piston longitudinally in a direction opposite the movement of said piston in response to said test pressure; display means carried by said first-mentioned means adjacent the extremity of said cylinder opposite said pressure inlet, and defining a viewing slot extending across said display means generally normal to the axis of said cylinder, said display means including indicia disposed along said slot; and indicator means carried by said piston and movable therewith adjacent said slot, said indicator means defIning an indicator line extending diagonally relative to said slot whereby said indicator line undergoes an apparent transverse travel along said slot upon longitudinal movement of said indicator means with said piston.
Claim 3
Dependent Claim
37 words
A compression tester according to claim 1 wherein said first-mentioned means comprises a T-shape, hollow case and an elongated stem received within the vertical leg of the T, said stem including a central bore constituting said cylinder.
Claim 4
Dependent Claim
35 words
A compression tester according to claim 1 wherein said first-mentioned means comprises an elongated stem having a lower extremity adapted for disposition within the central bore of a fitting cooperative with a spark plug port.
Claim 5
Dependent Claim
47 words
A compression tester according to claim 1 and including screw adjustment means carried by said case and in engagement with said bias means, said screw adjustment means being operable to compress said bias means and thereby adjust the force exerted by said bias means against said piston.
Claim 6
Dependent Claim
50 words
A compression tester according to claim 1 wherein said cylinder includes a seat, and wherein said tester further comprises holding valve means upon said seat, and holding bias means urging said holding valve means onto said seat, whereby test pressure is retained between said piston and said holding valve means.
Claim 7
Dependent Claim
44 words
A compression tester according to claim 5 and including release valve means carried by said case in engagement with said holding valve means and selectively operable to move and unseat said holding valve means from said seat to enable said test pressure to escape.
References Cited (Backward Citations)
US2620656A
Cited
US3320801A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |