US3803518A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for measuring long bores of small internal diameter
Assignee: Individual
•
Filing: 1971-11-09
•
Granted: 1974-04-09
•
Expires: 1991-11-09
Abstract
Abstract Device for measuring long bores of small internal diameter comprises measuring feeler means, a body rotatably connected to each end of the feeler means, centering means carried by each body for movements toward and away from the axis of rotation thereof, and means for effecting such movements of the centering means.
Inventors
- 👤 J Perthen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:13
CPC Classifications
G; G01; G01B; G01B5/00; G01B5/08; G01B5/12
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
165 words
A device for measuring a small diameter bore of a workpiece comprising a housing having apertures between its ends and being of such diameter as to be accommodated in said bore; feeler means carried within said housing between its ends and extending through the apertures in said housing for engagement with the surface of the bore of said workpiece; a body at each end of said housing and being of such size as to be accommodated in said bore; centering means carried by each of said bodies beyond each end of said housing for adjustment radially thereof into and out of engagement with the surface of said bore to center said bodies and said housing within said bore; means carried by each of said bodies for moving said centering means into engagement with the surface of said bore; and means rotatably mounting said bodies at each end of said housing for enabling rotation of said bodies relative to said feeler means and to one another.
Claim 2
Independent Claim
165 words
A device for measuring a small diameter bore of a workpiece comprising a housing having apertures between its ends and being of such diameter as to be accommodated in said bore; feeler means carried within said housing between its ends and extending through the apertures in said housing for engagement with the surface of the bore of said workpiece; a body at each end of said housing and being of such size as to be accommodated in said bore; centering means carried by each of said bodies beyond each end of said housing for adjustment radially thereof into and out of engagement with the surface of said bore to center said bodies and said housing within said bore; means carried by each of said bodies for moving said centering means into engagement with the surface of said bore; and means rotatably mounting said bodies at each end of said housing for enabling rotation of said bodies relative to said feeler means and to one another.
Claim 3
Dependent Claim
29 words
A device according to claim 1 wherein said feeler means comprises diametrically opposed sensing pins projecting through apertures in said housing, and lever means supporting each of said pins.
Claim 4
Dependent Claim
21 words
A device according to claim 2 including spring means acting on said lever means and enabling relative movement of said pins.
Claim 5
Dependent Claim
23 words
A device according to claim 2 including electrical means carried by said lever means and operable to sense relative movement of said pins.
Claim 6
Dependent Claim
28 words
A device according to claim 1 wherein the centering means of each of said bodies comprises three members angularly spaced uniformly from one another about the associated body.
Claim 7
Dependent Claim
16 words
A device according to claim 5 including spring means connecting said members to their associated body.
Claim 8
Dependent Claim
25 words
A device according to claim 6 wherein said adjusting means of one of said bodies comprises a tapered pin interposed between and engaging said members.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-08 | 1977-10-08 | 1978-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-08 | 1981-10-08 | 1982-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-08 | 1985-10-08 | 1986-04-09 | $7700.00 | Window Closed / Lapsed |