US5293131A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Capacitive probe for bore measurement
Assignee: Measurement Systems Inc
•
Filing: 1992-09-04
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Granted: 1994-03-08
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Expires: 2012-09-04
Abstract
Abstract A capacitive probe for inspecting and measuring the diameter of a bore and thus the amount of wear in the bore formed of an electrically insulated housing containing two levels of conductive plates to measure distance between the plates and the rifling grooves and lands of a bore.
Inventors
- 👤 Timothy D. Semones
- 👤 Carl E. Price
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:02
CPC Classifications
G; G01; G01R; G01R1/00; G01R1/02; G01R1/06; G01R1/067; G01R1/07
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
83 words
A capacitive probe for measurement of a bore having a plurality of lands and grooves, comprising: an elongated, generally cylindrically shaped housing formed of an electrically insulating material comprising a proximal end for insertion into a bore; a plurality of electrically conductive plates affixed around the circumference of the housing, said plates alternating at one of two distances from the proximal end of the housing and being electrically isolated from each other; and means for connecting said plates to a data receiving means.
Claim 2
Dependent Claim
83 words
A capacitive probe for measurement of a bore having a plurality of lands and grooves, comprising: an elongated, generally cylindrically shaped housing formed of an electrically insulating material comprising a proximal end for insertion into a bore; a plurality of electrically conductive plates affixed around the circumference of the housing, said plates alternating at one of two distances from the proximal end of the housing and being electrically isolated from each other; and means for connecting said plates to a data receiving means.
Claim 3
Dependent Claim
47 words
The capacitive probe as recited in claim 1, wherein the length of each of said plates measured along the circumference of the housing is equal to a multiple of the combined length of one of said lands and one of said grooves of the bore being measured.
Claim 4
Dependent Claim
27 words
The capacitive probe as recited in claim 1, wherein said plates are located on the surface of said housing equidistant from the longitudinal axis of said housing.
Claim 5
Dependent Claim
98 words
A capacitive probe for measurement of a bore having a plurality of lands and grooves, comprising: an elongated, generally cylindrically shaped housing formed of an electrically insulating material comprising a proximal end for insertion into a bore; a plurality of electrically conductive plates affixed around the circumference of the housing, said plates being electrically isolated from each other and having a length, measured along the circumference of said housing, equal to a multiple of the combined length of one of said lands and one of said grooves; and means for connecting said plates to a data receiving means.
Claim 6
Dependent Claim
98 words
A capacitive probe for measurement of a bore having a plurality of lands and grooves, comprising: an elongated, generally cylindrically shaped housing formed of an electrically insulating material comprising a proximal end for insertion into a bore; a plurality of electrically conductive plates affixed around the circumference of the housing, said plates being electrically isolated from each other and having a length, measured along the circumference of said housing, equal to a multiple of the combined length of one of said lands and one of said grooves; and means for connecting said plates to a data receiving means.
References Cited (Backward Citations)
US4112355A
Cited
US4245188A
Cited
US4168465A
Cited
US4295092A
Cited
DE3237594A1
Cited
US4929885A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-03-07 | 1997-09-06 | 1998-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-03-07 | 2001-09-06 | 2002-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-03-07 | 2005-09-06 | 2006-03-08 | $7700.00 | Window Closed / Lapsed |