US3713618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self centering support
Assignee: KRUEGER Inc A CORP OF WI
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Filing: 1971-03-22
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Granted: 1973-01-30
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Expires: 1991-03-22
Abstract
Abstract A support for a seat or the like can be rotated in either direction from its normally centered position. A helical spring extends circuitously around an annular channel concentric with the axes upon which the seat rotates. According to the direction of rotation, a depending arm disposed between seats for the ends of the spring engages one or the other end of the spring to displace the engaged end of the spring from its seat. When the deflecting force is released, the engaged end of the spring returns to its seat and, in so doing, acts on the depending arm to restore the arm to its normal position between the seated ends of the spring.
Inventors
- 👤 P Hendrickson
- 👤 R Resch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:43
CPC Classifications
A; A47; A47C; A47C3/00; A47C3/18; F; F16; F16C; F16C11/00; F16C11/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
147 words
A self-centering device including a generally upright standard constituting a column having a central bearing, a post requiring centering, said column having an annular channel surrounding the post and provided with generally radially spaced bosses projecting into said channel and providing opposing spring seat shoulders, a helical compression spring disposed in said channel and having its ends engaged with said shoulders, a disc connected with said post, said disc having an arm connected with said post and extending into the channel and normally disposed radially between said shoulders and circumferentially between the ends of said spring, said disc having a key and said post a key way in which said key is engaged, said channel having radially spaced inner and outer walls and being in supporting relation to said disc, the inner wall of the channel intervening between said spring and the key way of said posts.
Claim 2
Dependent Claim
147 words
A self-centering device including a generally upright standard constituting a column having a central bearing, a post requiring centering, said column having an annular channel surrounding the post and provided with generally radially spaced bosses projecting into said channel and providing opposing spring seat shoulders, a helical compression spring disposed in said channel and having its ends engaged with said shoulders, a disc connected with said post, said disc having an arm connected with said post and extending into the channel and normally disposed radially between said shoulders and circumferentially between the ends of said spring, said disc having a key and said post a key way in which said key is engaged, said channel having radially spaced inner and outer walls and being in supporting relation to said disc, the inner wall of the channel intervening between said spring and the key way of said posts.
Claim 3
Dependent Claim
147 words
A self-centering device including a generally upright standard constituting a column having a central bearing, a post requiring centering, said column having an annular channel surrounding the post and provided with generally radially spaced bosses projecting into said channel and providing opposing spring seat shoulders, a helical compression spring disposed in said channel and having its ends engaged with said shoulders, a disc connected with said post, said disc having an arm connected with said post and extending into the channel and normally disposed radially between said shoulders and circumferentially between the ends of said spring, said disc having a key and said post a key way in which said key is engaged, said channel having radially spaced inner and outer walls and being in supporting relation to said disc, the inner wall of the channel intervening between said spring and the key way of said posts.
Claim 4
Dependent Claim
147 words
A self-centering device including a generally upright standard constituting a column having a central bearing, a post requiring centering, said column having an annular channel surrounding the post and provided with generally radially spaced bosses projecting into said channel and providing opposing spring seat shoulders, a helical compression spring disposed in said channel and having its ends engaged with said shoulders, a disc connected with said post, said disc having an arm connected with said post and extending into the channel and normally disposed radially between said shoulders and circumferentially between the ends of said spring, said disc having a key and said post a key way in which said key is engaged, said channel having radially spaced inner and outer walls and being in supporting relation to said disc, the inner wall of the channel intervening between said spring and the key way of said posts.
Claim 5
Dependent Claim
41 words
A self-centering device according to claim 1 in which the column has means providing stop surfaces and the post pivotally movable in said bearing has stud means engageable with said stop surfaces to define respective limits of oscillation of said post.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-30 | 1976-07-31 | 1977-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-30 | 1980-07-31 | 1981-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-30 | 1984-07-31 | 1985-01-30 | $7700.00 | Window Closed / Lapsed |