US3737010A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Retractable post
Assignee: McDonnell Douglas Corp
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Filing: 1971-06-03
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Granted: 1973-06-05
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Expires: 1991-06-03
Abstract
Abstract A floor mounted retractable post to restrain a serving cart in an aircraft in areas where a fixed post protruding above the floor would present a hazard. A spring-loaded, flush-mounted post is extendible by manual manipulation and is maintained flush with the floor upon depression when not in use.
Inventors
- 👤 H Nelson
- 👤 R Sharp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:27
CPC Classifications
B; B64; B64D; B64D11/00; B64D11/0007; B62; B62B; B62B5/00; B62B5/04; B62B5/049
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
169 words
A retractable post assembly for vertical movement of a post between a retractable position within a housing and an extended position above the housing, said assembly comprising: a post housing adapted to be mounted in an opening in the floor, said housing having an annular opening in the top thereof, said opening extending downwardly and having a varied inner diameter, a post having a head assembly with a flat undersurface and a shaft, said head assembly being of a larger diameter than the shaft of said post, said opening having an inner cylindrical wall surface of sufficient diameter to receive the head of said post therein for flush mounting thereof, said inner wall surface having a turned in horizontal seating surface for said head assembly to limit downward movement of said post, said inner wall surface having a turned out surface forming a shoulder, said post having an outward extension integral therewith and engageable with said shoulder to limit upward vertical movement of said post relative to said housing.
Claim 2
Dependent Claim
169 words
A retractable post assembly for vertical movement of a post between a retractable position within a housing and an extended position above the housing, said assembly comprising: a post housing adapted to be mounted in an opening in the floor, said housing having an annular opening in the top thereof, said opening extending downwardly and having a varied inner diameter, a post having a head assembly with a flat undersurface and a shaft, said head assembly being of a larger diameter than the shaft of said post, said opening having an inner cylindrical wall surface of sufficient diameter to receive the head of said post therein for flush mounting thereof, said inner wall surface having a turned in horizontal seating surface for said head assembly to limit downward movement of said post, said inner wall surface having a turned out surface forming a shoulder, said post having an outward extension integral therewith and engageable with said shoulder to limit upward vertical movement of said post relative to said housing.
Claim 3
Dependent Claim
51 words
A retractable post assembly as set forth in claim 1, said post having wall engageable means outwardly urged, said inner wall surface having a cam surface engageable by said wall engageable means to urge said post outward extension into contact with said shoulder when said post is in its extended position.
Claim 4
Dependent Claim
45 words
A retractable post assembly as set forth in claim 2, said post outward extension being on the lower end thereof and having a bore with a helical compression spring therein, said wall engageable means being at each end of said spring and outwardly urged thereby.
Claim 5
Dependent Claim
70 words
A retractable post assembly as set forth in claim 1, said post having outwardly urged wall engageable means thereon, said inner wall surface having a bell shaped configuration at the lower end thereof, said outwardly urged wall engageable means being in contact with said bell shaped configuration when said post is in its retractable position to thereby urge said post head assembly into engagement with said turned in seating surface.
Claim 6
Dependent Claim
51 words
A retractable post assembly as set forth in claim 1, said head assembly having a handle flush mounted therein, said handle being pivotal from horizontal to less than 90* vertical for manual withdrawal of said post from retractable position to extended position, said handle returning to horizontal upon manual release thereof.
Claim 7
Dependent Claim
85 words
A retractable post assembly as set forth in claim 1, said post having wall engageable means outwardly urged, said inner wall surface having a first cam surface engageable by said wall engageable means to urge said post outward extension into contact with said shoulder when said post is in its extended position, said inner wall surface having a second cam surface thereof engageable with said wall engageable means to urge said head assembly against said seating surface when said post is in its retractable position.
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) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |