US4030202A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bore gage
Assignee: Federal Products Co
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Filing: 1975-12-12
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Granted: 1977-06-21
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Expires: 1995-12-12
Abstract
Abstract A bore gage that is used for determining the diameter of a bore or hole is provided with a measuring head comprising a cylindrical housing. Within the housing is an electrical measuring member or transducer that can take the form of a linear voltage differential transformer. Contact points or probes are connected to each of the moving elements and pass through bearing members on the surface of the housing which retain the transducer therein.
Inventors
- 👤 Mohamed F. A. Fadl
- 👤 Joseph S. Olasz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:11
CPC Classifications
G; G01; G01B; G01B7/00; G01B7/12; G01B7/13
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
153 words
A bore gage comprising an elongated cylindrical housing, a substantially cylindrical electrical transducer within said housing having a pair of opposed measuring probes, each having a circular cross section, said transducer having a body of a diameter greater than the diameter of the measuring probes, said measuring probes extending in axial alignment outwardly of said housing on a diameter thereof, said housing including chordal surfaces, each chordal surface having an opening, bearing plate members on said chordal surfaces of the housing, said probes extending through the bearing members, said bearing members locating the probes on a diameter of the housing and dimensioned to serve as an abutment for the end walls of the transducer body, the maximum length of the body being less than the distance between the plate members whereby the transducer is free to move restrained only by said bearing members, said body being sealed to prevent entry of foreign material.
Claim 2
Dependent Claim
153 words
A bore gage comprising an elongated cylindrical housing, a substantially cylindrical electrical transducer within said housing having a pair of opposed measuring probes, each having a circular cross section, said transducer having a body of a diameter greater than the diameter of the measuring probes, said measuring probes extending in axial alignment outwardly of said housing on a diameter thereof, said housing including chordal surfaces, each chordal surface having an opening, bearing plate members on said chordal surfaces of the housing, said probes extending through the bearing members, said bearing members locating the probes on a diameter of the housing and dimensioned to serve as an abutment for the end walls of the transducer body, the maximum length of the body being less than the distance between the plate members whereby the transducer is free to move restrained only by said bearing members, said body being sealed to prevent entry of foreign material.
Claim 3
Dependent Claim
26 words
A bore gage as in claim 1 wherein said housing is provided with apertures therethrough whereby air introduced into the housing will escape through said apertures.
References Cited (Backward Citations)
FR807086A
Cited
DE884111C
Cited
US2439595A
Cited
US2622331A
Cited
GB762361A
Cited
DE1019832B
Cited
FR1535816A
Cited
US3939568A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-20 | 1980-12-20 | 1981-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-20 | 1984-12-20 | 1985-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-20 | 1988-12-20 | 1989-06-21 | $7700.00 | Window Closed / Lapsed |