US3757383A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hollow sphere-like structures
Assignee: TIYOSHI SEISAKUSH YK
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Filing: 1972-01-11
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Granted: 1973-09-11
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Expires: 1992-01-11
Abstract
Abstract A first hollow semisphere having therein a cup-like part with a socket and a second hollow semisphere having therein a hollow journal cylinder for receiving an axle are joined together along their peripheral rims to form a hollow spherical structure, one end of the journal cylinder, which is integrally formed with the second semisphere, being fitted in the socket of the first semisphere, and a passageway is provided to communicate the hollow interior of the structure with the journal bore. This spherical structure may be used as it is or it may be enveloped in an outer layer to form a hollow spherical article such as a spherical wheel in a caster.
Inventors
- 👤 S Liyoshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:01
CPC Classifications
B; B60; B60B; B60B33/00; B60B33/0047; B60B33/0052; A; A47; A47B; A47B95/00; A47B95/02; B60B33/08; A47B2095/028
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
117 words
A hollow sphere-like structure comprising a first hollow hemisphere-like semishell having therein a journal seat formed integrally therewith on the inner surface thereof and having a socket extending radially centrally of the semishell, a second hollow hemisphere-like semishell having therein a journal cylinder formed integrally therewith on the inner surface thereof and having a journal bore extending radially therethrough centrally of the second semishell for receiving a shaft structure from outside said structure, the semishells being joined together along the peripheral rims thereof and the free end of the journal cylinder coaxially fitted in the socket of the journal seat, and means forming a passageway between the hollow interior of the sphere-like structure and the journal bore.
Claim 2
Dependent Claim
117 words
A hollow sphere-like structure comprising a first hollow hemisphere-like semishell having therein a journal seat formed integrally therewith on the inner surface thereof and having a socket extending radially centrally of the semishell, a second hollow hemisphere-like semishell having therein a journal cylinder formed integrally therewith on the inner surface thereof and having a journal bore extending radially therethrough centrally of the second semishell for receiving a shaft structure from outside said structure, the semishells being joined together along the peripheral rims thereof and the free end of the journal cylinder coaxially fitted in the socket of the journal seat, and means forming a passageway between the hollow interior of the sphere-like structure and the journal bore.
Claim 3
Dependent Claim
25 words
A hollow sphere-like structure according to claim 1 further comprising an outer layer, the joined semishells constituting a core structure of the hollow sphere-like article.
Claim 4
Dependent Claim
11 words
A hollow sphere-like structure according to claim 2 which is spherical.
Claim 5
Dependent Claim
11 words
A hollow sphere-like structure according to claim 2 which is ellipsoidal.
Claim 6
Dependent Claim
11 words
A hollow sphere-like structure according to claim 2 which is spheroidal.
Claim 7
Dependent Claim
11 words
A hollow sphere-like structure according to claim 2 which is ovaloidal.
Claim 8
Dependent Claim
69 words
A hollow spherical structure according to claim 2 further comprising a cantilever axle in the journal bore, a caster swivel bracket to which the upper root end of said axle is fixed, and means on said bracket for mounting said bracket to swivel about a swivel axis, the axis of the axle being inclined with respect to the swivel axis as viewed in elevation in two mutually orthogonal directions.
Claim 9
Dependent Claim
50 words
A hollow sphere-like structure according to claim 1 in which the end of the journal cylinder has an inwardly extending flange thereon terminating at a rim and adapted to snap into locking position in an annular groove formed around an end of a shaft structure inserted into the journal bore.
Claim 10
Dependent Claim
25 words
A hollow sphere-like structure according to claim 3 further comprising an outer layer, the joined semishells constituting a core structure of the hollow sphere-like article.
Claim 11
Dependent Claim
57 words
A hollow sphere-like article according to claim 1 in which the first hollow semishell has a central journal bore from the bottom of the socket to the outside of said semishell and aligned coaxially with the journal bore through the journal cylinder, whereby a through hole for journalling a shaft structure is formed by the journal bores.
Claim 12
Dependent Claim
25 words
A hollow sphere-like structure according to claim 5 further comprising an outer layer, the joined semishells constituting a core structure of the hollow sphere-like article.
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) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |