Patent US3855843A successfully refreshed from Google Patents.
US3855843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface finish measuring gauge
Assignee: Motors Liquidation Co
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Filing: 1973-05-31
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Granted: 1974-12-24
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Expires: 1993-05-31
Abstract
Abstract A surface finish measuring gauge using fluid flow to indicate surface roughness. The device has a triangular base with two adjustable supporting legs depending from apices of the base. The third apex has a tubular member secured thereto, which tubular member has a spherical end thereon and is adapted to permit fluid flow therethrough. A measuring head member has a spherical portion, mating with the spherical end of the tubular member, and has a through passage aligned with a passage in the tubular member. The two supporting legs and the measuring head provide three point contact with the surface to be measured. The measuring head, due to the spherical portions, automatically adjusts to the general contour of the surface. Measurement of fluid flow, past an annular edge on the measuring head adjacent the surface to be measured, provides a reading proportional to surface roughness.
Inventors
- 👤 F Yagiela
- 👤 M Crowell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:08
CPC Classifications
G; G01; G01B; G01B13/00; G01B13/22; Y; Y10; Y10S; Y10S33/00; Y10S33/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
172 words
A fluid gauge for measuring surface finish comprising, a triangular base member; a pair of support members depending from two apices of said base member and being disposed in a plane intersecting the plane of the base member; fluid conducting means including passage means for conducting fluid and being secured to the third apex of said base member and being disposed in a plane intersecting the plane of the base member, a hemi-spherical end on said passage means; measuring head means for conducting fluid from said passage means to the surface to be measured including, a spherical recess sealingly mating with said hemi-spherical end an annular surface adapted to be disposed adjacent the surface to be measured and a fluid passage aligned with said passage means communicating between said spherical recess and said annular surface; and retaining means for freely retaining said spherical surfaces in abutting sealing relation and for permitting relative movement between said spherical surfaces so that said annular opening will be disposed substantially parallel to the surface being measured.
Claim 2
Dependent Claim
172 words
A fluid gauge for measuring surface finish comprising, a triangular base member; a pair of support members depending from two apices of said base member and being disposed in a plane intersecting the plane of the base member; fluid conducting means including passage means for conducting fluid and being secured to the third apex of said base member and being disposed in a plane intersecting the plane of the base member, a hemi-spherical end on said passage means; measuring head means for conducting fluid from said passage means to the surface to be measured including, a spherical recess sealingly mating with said hemi-spherical end an annular surface adapted to be disposed adjacent the surface to be measured and a fluid passage aligned with said passage means communicating between said spherical recess and said annular surface; and retaining means for freely retaining said spherical surfaces in abutting sealing relation and for permitting relative movement between said spherical surfaces so that said annular opening will be disposed substantially parallel to the surface being measured.
Claim 3
Dependent Claim
209 words
A fluid gauge for measuring surface finish comprising, a triangular base member; a pair of support members depending from two apices of said base member and being disposed in a plane intersecting the plane of the base member; fluid conducting means including passage means for conducting fluid and being secured to the third apex of said base member and being disposed in a plane intersecting the plane of the base member, a hemi-spherical end on said passage means; measuring head means for conducting fluid from said passage means to the surface to be measured and having a spherical recess sealingly mating with said hemi-spherical end, a fluid chamber, a fluid passage between said spherical recess and said chamber in fluid communication with said passage means, an annular surface having inner and outer edges and being adapted to be disposed adjacent the surface to be measured the inner edge of said annular surface defining the outer edge of said fluid chamber, and a spherical surface adjacent the outer edge of said annular member; and retaining means for freely retaining said spherical surfaces in abutting sealing relation and for permitting relative movement between said spherical surfaces so that said annular opening will be disposed substantially parallel to the surface being measured.
Claim 4
Dependent Claim
209 words
A fluid gauge for measuring surface finish comprising, a triangular base member; a pair of support members depending from two apices of said base member and being disposed in a plane intersecting the plane of the base member; fluid conducting means including passage means for conducting fluid and being secured to the third apex of said base member and being disposed in a plane intersecting the plane of the base member, a hemi-spherical end on said passage means; measuring head means for conducting fluid from said passage means to the surface to be measured and having a spherical recess sealingly mating with said hemi-spherical end, a fluid chamber, a fluid passage between said spherical recess and said chamber in fluid communication with said passage means, an annular surface having inner and outer edges and being adapted to be disposed adjacent the surface to be measured the inner edge of said annular surface defining the outer edge of said fluid chamber, and a spherical surface adjacent the outer edge of said annular member; and retaining means for freely retaining said spherical surfaces in abutting sealing relation and for permitting relative movement between said spherical surfaces so that said annular opening will be disposed substantially parallel to the surface being measured.
Claim 5
Dependent Claim
190 words
A fluid gauge for measuring surface finish comprising, three support means for supporting said gauge on the surface to be measured, one of said support means including fluid conducting means having a tubular portion and a spherical portion at one end of said tubular portion; a triangular body having the apices thereof secured to said support means; measuring means for controlling fluid flow between said gauge and the surface to be measured including a body portion, a recessed spherical portion on one side of said body portion sealingly mating with said support means spherical portion, an annular surface on the other side of said body portion adapted to be in contact with the surface to be measured, and fluid passage means through the body portion between the recessed spherical portion and the annular surface for providing fluid communication between said annular surface and said fluid conducting means; and retainer means for maintaining said measuring means on said one support means and for permitting said measuring means to pivot relative to said one support means to maintain said annular surface in surface to surface contact with the surface to be measured.
Claim 6
Dependent Claim
190 words
A fluid gauge for measuring surface finish comprising, three support means for supporting said gauge on the surface to be measured, one of said support means including fluid conducting means having a tubular portion and a spherical portion at one end of said tubular portion; a triangular body having the apices thereof secured to said support means; measuring means for controlling fluid flow between said gauge and the surface to be measured including a body portion, a recessed spherical portion on one side of said body portion sealingly mating with said support means spherical portion, an annular surface on the other side of said body portion adapted to be in contact with the surface to be measured, and fluid passage means through the body portion between the recessed spherical portion and the annular surface for providing fluid communication between said annular surface and said fluid conducting means; and retainer means for maintaining said measuring means on said one support means and for permitting said measuring means to pivot relative to said one support means to maintain said annular surface in surface to surface contact with the surface to be measured.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |