Patent US4253241A successfully refreshed from Google Patents.
US4253241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bore gauge
Assignee: Westinghouse Electric Co LLC
•
Filing: 1979-11-08
•
Granted: 1981-03-03
•
Expires: 1999-11-08
Abstract
Abstract A bore gauge for measuring the internal diameter of tubes comprises at least two concentrically and rotatably arranged members connected by a helically wound spring member. The spring member is capable of contacting the inside surface of the tube and causing relative rotation of the members thereby indicating the internal diameter of the tube.
Inventors
- 👤 William F. Nanstiel, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:09
CPC Classifications
G; G01; G01B; G01B3/00; G01B3/46; G01B5/00; G01B5/08; G01B5/12
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
135 words
A bore gauge for measuring the internal diameter of a tube comprising: a cylindrical first member; a cap mounted on one end of said first member; an indicator member mounted on the other end of said first member; a cylindrical second member rotatably disposed around said first member and terminating short of said cap; a recording member attached to one end of said second member and disposed adjacent said indicator member; and a helically wound spring member disposed around said first member and attached at one end to said cap and at the other end to said second member for contacting the inside surface of said tube and causing said second member and said recording member to rotate relative to said first member and said indicator member thereby indicating the internal diameter of said tube.
Claim 2
Dependent Claim
135 words
A bore gauge for measuring the internal diameter of a tube comprising: a cylindrical first member; a cap mounted on one end of said first member; an indicator member mounted on the other end of said first member; a cylindrical second member rotatably disposed around said first member and terminating short of said cap; a recording member attached to one end of said second member and disposed adjacent said indicator member; and a helically wound spring member disposed around said first member and attached at one end to said cap and at the other end to said second member for contacting the inside surface of said tube and causing said second member and said recording member to rotate relative to said first member and said indicator member thereby indicating the internal diameter of said tube.
Claim 3
Dependent Claim
23 words
The bore gauge according to claim 1 wherein said spring member is disposed between said cap and the end of said second member.
Claim 4
Dependent Claim
16 words
The bore gauge according to claim 2 wherein said spring member is a steel spring wire.
Claim 5
Dependent Claim
37 words
The bore gauge according to claim 3 wherein said bore gauge further comprises a set screw disposed in said indicator member and near said recording member for selectively contacting said recording member and preventing relative rotation therebetween.
Claim 6
Dependent Claim
300 words
A bore gauge for measuring the internal diameter of a tube comprising: a cylindrical first member having a first cap attached to one end and a first indicator member attached to the other end; a cylindrical second member rotatably disposed around said first member and having a first recording member attached to one end thereof; a first helically wound spring member disposed around said first member and attached to one end to said first cap and at the other end to said second member for contacting the inside surface of said tube and causing said second member and said first recording member to rotate relative to said first member and said first indicator member thereby indicating the internal diameter of said tube at a first location; a cylindrical third member rotatably disposed around said second member and having a second cap attached to one end and a second indicator member attached to the other end; a cylindrical fourth member rotatably disposed around said third member and having a second recording member attached to one end thereof; a second helically wound spring member disposed around said third member and attached at one end to said second cap and at the other end to said fourth member for contacting the inside surface of said tube and causing said fourth member and said second recording member to rotate relative to said third member and said second indicator member thereby indicating the internal diameter of said tube at a second location; and a pin attached to said fourth member and to said second member while extending through a slot in said third member for allowing said fourth member to rotate relative to said second member thereby indicating an internal diameter of said second location as relative to the internal diameter of said first location.
Claim 7
Dependent Claim
300 words
A bore gauge for measuring the internal diameter of a tube comprising: a cylindrical first member having a first cap attached to one end and a first indicator member attached to the other end; a cylindrical second member rotatably disposed around said first member and having a first recording member attached to one end thereof; a first helically wound spring member disposed around said first member and attached to one end to said first cap and at the other end to said second member for contacting the inside surface of said tube and causing said second member and said first recording member to rotate relative to said first member and said first indicator member thereby indicating the internal diameter of said tube at a first location; a cylindrical third member rotatably disposed around said second member and having a second cap attached to one end and a second indicator member attached to the other end; a cylindrical fourth member rotatably disposed around said third member and having a second recording member attached to one end thereof; a second helically wound spring member disposed around said third member and attached at one end to said second cap and at the other end to said fourth member for contacting the inside surface of said tube and causing said fourth member and said second recording member to rotate relative to said third member and said second indicator member thereby indicating the internal diameter of said tube at a second location; and a pin attached to said fourth member and to said second member while extending through a slot in said third member for allowing said fourth member to rotate relative to said second member thereby indicating an internal diameter of said second location as relative to the internal diameter of said first location.
Claim 8
Dependent Claim
15 words
The bore gauge according to claim 5 wherein said spring members are steel spring wires.
References Cited (Backward Citations)
US2135912A
Cited
US2214633A
Cited
CH216190A
Cited
US2311477A
Cited
US2361336A
Cited
US2456497A
Cited
US2661541A
Cited
US2830375A
Cited
US2770045A
Cited
US3316649A
Cited
US3721012A
Cited
US3646685A
Cited
US3772794A
Cited
US3959887A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-03-02 | 1984-09-01 | 1985-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-02 | 1988-09-01 | 1989-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-02 | 1992-09-01 | 1993-03-03 | $7700.00 | Window Closed / Lapsed |