Patent US4015880A successfully refreshed from Google Patents.
US4015880A
Expired / Lapsed
US
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Multiple level fluid bearing track assembly
Assignee: United States Department of the Air Force
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Filing: 1975-05-21
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Granted: 1977-04-05
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Expires: 1995-05-21
Abstract
Abstract A multiple level fluid bearing track assembly having a plurality of shoulders thereon to form an upper and lower level for transporting articles of various sizes. A plurality of fluid jet inserts are incorporated within the track assembly to provide the necessary lift and motive force to the article to be transported. With the multiple level track assembly of this invention a variety of different sized articles can therefore be interchangeably or simultaneously transported without the physical alteration of the track assembly.
Inventors
- 👤 Ronald L. Colvin
- 👤 James H. Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:19
CPC Classifications
H; H10; H10P; H10P72/00; H10P72/30; H10P72/36; B; B65; B65G; B65G51/00; B65G51/02; B65G51/03
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
217 words
A multiple level fluid bearing track assembly for transporting articles of various dimensions comprising a body, said body having a centrally located longitudinally extending base portion of a predetermined height, a first pair of longitudinally extending shoulders adjacent said base portion, said base portion and said first pair of shoulders forming a lower level of said track assembly, first means for transporting articles of one dimension in a predetermined direction, said first transporting means being in the form of a longitudinally extending fluid jet insert located within said base portion intermediate said first pair of shoulders, said body having a second pair of longitudinally extending shoulders spaced a predetermined distance in the transverse direction from said first pair of shoulders, second means for transporting articles of another dimension in said same predetermined direction as said articles of said one dimension, said second transporting means being in the form of a pair of longitudinally extending fluid jet inserts of a height greater than said predetermined height of said base portion, each of said pair of inserts being located adjacent one of said second pair of shoulders, respectively, and forming in conjunction therewith an upper level of said track assembly whereby articles of various dimensions can be interchangeably or simultaneously transported in said predetermined direction by said track assembly.
Claim 2
Dependent Claim
217 words
A multiple level fluid bearing track assembly for transporting articles of various dimensions comprising a body, said body having a centrally located longitudinally extending base portion of a predetermined height, a first pair of longitudinally extending shoulders adjacent said base portion, said base portion and said first pair of shoulders forming a lower level of said track assembly, first means for transporting articles of one dimension in a predetermined direction, said first transporting means being in the form of a longitudinally extending fluid jet insert located within said base portion intermediate said first pair of shoulders, said body having a second pair of longitudinally extending shoulders spaced a predetermined distance in the transverse direction from said first pair of shoulders, second means for transporting articles of another dimension in said same predetermined direction as said articles of said one dimension, said second transporting means being in the form of a pair of longitudinally extending fluid jet inserts of a height greater than said predetermined height of said base portion, each of said pair of inserts being located adjacent one of said second pair of shoulders, respectively, and forming in conjunction therewith an upper level of said track assembly whereby articles of various dimensions can be interchangeably or simultaneously transported in said predetermined direction by said track assembly.
Claim 3
Dependent Claim
30 words
A multiple level fluid bearing track assembly as defined in claim 1 further comprising a support insert removably positioned between said first pair of shoulders located on said base portion.
Claim 4
Dependent Claim
26 words
A multiple level fluid bearing track assembly as defined in claim 2 further comprising an air source operably connected to said plurality of fluid jet inserts.
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) | 1980-04-04 | 1980-10-04 | 1981-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-04 | 1984-10-04 | 1985-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-04 | 1988-10-04 | 1989-04-05 | $7700.00 | Window Closed / Lapsed |