Patent JPS6093533A successfully refreshed from Google Patents.
US4545129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiposition level
Assignee: Individual
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Filing: 1983-12-19
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Granted: 1985-10-08
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Expires: 2003-12-19
Abstract
Abstract An elongated hollow body of transparent material is provided and defines a closed cavity therein including a first elongated portion extending transversely of one end of the body, a second elongated portion disposed adjacent and at a 45° angle relative to the other end of the body and a third elongated portion extending along the body and communicating corresponding ends of the first and second cavity portions. A quantity of liquid and a gas bubble fill the cavity and the cavity walls include first, second and third partial cylindrical wall portions spaced closely inwardly of first and second end surfaces and a longitudinal side surface of the body. The first and second end surfaces are disposed at 90° and 45° relative to the longitudinal side surface of the body and each of the surfaces includes indicia thereon defining the central area of the corresponding cavity wall portion in which the bubble may be seated. The body includes additional longitudinal side surfaces and corresponding cavity wall portions registered therewith of varying sizes in which the bubble may be seated.
Inventors
- 👤 Theodore M. Stone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:56
CPC Classifications
G; G01; G01C; G01C9/00; G01C9/18; G01C9/24
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
289 words
A multiposition level including an elongated hollow body having a closed cavity defined therein incorporating a first elongated longitudinally extending central cavity portion, a second generally 45° angulated first end cavity portion disposed at one end of said central cavity portion and a third 90° angulated second end cavity portion disposed at the other end of said central cavity portion, said end cavity portions projecting outwardly from the same side of said central cavity portion and including inner end portions opening into the adjacent ends of said central cavity portion, said body being constructed of transparent material, a quantity of liquid disposed in and partially filling said cavity, a gas bubble in said cavity occupying the portion thereof not occupied by said liquid, a first side of said body corresponding to said same side of said cavity including a first plane outer surface, a first end of said body corresponding to said other end of said central cavity portion including a second plane outer surface disposed normal to said first surface, the side of said body opposite from said first outer surface including a third plane outer surface paralleling said first surface and a fourth plane outer surface adjacent said one end of said central cavity portion angularly displaced 45° relative to said third outer surface and paralleling said first end cavity portion, said central, second and third cavity portions including first wall portions against which said bubble is centered when said body is disposed with said first, second and fourth outer surfaces, respectively, horizontally disposed, said first wall portions comprising concave partial spherical wall portions, said second, third and fourth outer surfaces include indicia thereon indicating the centered positions of said bubble against the corresponding first wall portions.
Claim 2
Dependent Claim
289 words
A multiposition level including an elongated hollow body having a closed cavity defined therein incorporating a first elongated longitudinally extending central cavity portion, a second generally 45° angulated first end cavity portion disposed at one end of said central cavity portion and a third 90° angulated second end cavity portion disposed at the other end of said central cavity portion, said end cavity portions projecting outwardly from the same side of said central cavity portion and including inner end portions opening into the adjacent ends of said central cavity portion, said body being constructed of transparent material, a quantity of liquid disposed in and partially filling said cavity, a gas bubble in said cavity occupying the portion thereof not occupied by said liquid, a first side of said body corresponding to said same side of said cavity including a first plane outer surface, a first end of said body corresponding to said other end of said central cavity portion including a second plane outer surface disposed normal to said first surface, the side of said body opposite from said first outer surface including a third plane outer surface paralleling said first surface and a fourth plane outer surface adjacent said one end of said central cavity portion angularly displaced 45° relative to said third outer surface and paralleling said first end cavity portion, said central, second and third cavity portions including first wall portions against which said bubble is centered when said body is disposed with said first, second and fourth outer surfaces, respectively, horizontally disposed, said first wall portions comprising concave partial spherical wall portions, said second, third and fourth outer surfaces include indicia thereon indicating the centered positions of said bubble against the corresponding first wall portions.
Claim 3
Dependent Claim
58 words
The level of claim 1 wherein said body includes remote, parallel, plane fifth and sixth outer surfaces extending longitudinally thereof disposed normal to said first and third outer surfaces, said central cavity portion including second wall portions against which said bubble is centered when said body is disposed with said sixth and fifth surfaces, respectively, horizontal and uppermost.
Claim 4
Dependent Claim
17 words
The level of claim 1 wherein said second wall portions are inwardly concave partial spherical wall portions.
Claim 5
Dependent Claim
31 words
The level of claim 1 including a plane mirror overlying and opposing said second outer surface and hingedly supported from said body along one marginal edge of said second outer surface.
Claim 6
Dependent Claim
95 words
The level of claim 1 wherein the end of said third elongated angulated end portion of said cavity remote from said second elongated cavity portion opens through a corresponding end face of said body, a plug removable closing said opening, said plug including an inwardly opening cavity formed on the inner end thereof, the end of said angulated end portion of said cavity remote from said transverse cavity portion in which said plug is disposed including a longitudinal groove comprising a vent passage past said plug, the outer end of said groove being sealingly closed.
Claim 7
Dependent Claim
57 words
The level of claim 1 wherein said body includes an integral tang projecting into and diminishing the juncture area of the interior of said body between said first and third cavity portions, said tank projecting into said juncture area from the portion of said body defining the included angle defined between said first and third cavity portions.
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) | 1988-10-07 | 1989-04-08 | 1989-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-07 | 1993-04-08 | 1993-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-07 | 1997-04-08 | 1997-10-08 | $7700.00 | Window Closed / Lapsed |