US4438975A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Armrest for a seat
Assignee: Dentsply Research and Development Corp
•
Filing: 1982-06-21
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Granted: 1984-03-27
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Expires: 2002-06-21
Abstract
Abstract An armrest for a seat such as a stool having a post extending upwardly from an edge of the seat and supporting a substantially horizontal arm which is connected to the upper end of the post by a one-way clutch permitting pivotal movement of the arm in one direction around the axis of the post but preventing reverse pivotal movement of the arm and the mounting of the clutch on the post permitting limited vertical movement of the arm and clutch relative to the post to deactivate the clutch relative to the post to permit rotation of the arm relative to the post in the aforementioned reverse direction thereof.
Inventors
- 👤 Ralph J. Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:31
CPC Classifications
A; A47; A47C; A47C7/00; A47C7/54; A47C7/541; A47C1/00; A47C1/02; A47C1/022; A47C1/03
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
143 words
An arm rest arrangement for a seat such as a stool and the like comprising a seat member, a post extending perpendicularly relative to an edge of said seat and having sections of two different diameters in axial alignment, a one-way cluth movably supported upon the upper end of said post, an arm connected to said clutch and extending laterally relative to said post, said clutch being circular and being connected to said arm and movable axially upon said post between said sections of different diameters thereof and when engaging said section of larger diameter permitting rotation of said arm in one direction upon said post but preventing reverse direction and when said clutch is disposed upon the post section of smaller diameter said clutch is deactivated to permit rotation of the arm about the axis of the post in said reverse direction.
Claim 2
Dependent Claim
143 words
An arm rest arrangement for a seat such as a stool and the like comprising a seat member, a post extending perpendicularly relative to an edge of said seat and having sections of two different diameters in axial alignment, a one-way cluth movably supported upon the upper end of said post, an arm connected to said clutch and extending laterally relative to said post, said clutch being circular and being connected to said arm and movable axially upon said post between said sections of different diameters thereof and when engaging said section of larger diameter permitting rotation of said arm in one direction upon said post but preventing reverse direction and when said clutch is disposed upon the post section of smaller diameter said clutch is deactivated to permit rotation of the arm about the axis of the post in said reverse direction.
Claim 3
Dependent Claim
53 words
The arm rest according to claim 1 in which said circular clutch has a circular arrangement of clutching members engageable with said section of said post of larger diameter and mounted within a ring activating member to lock said arm against rotation in said reverse direction but permit rotation in said one direction.
Claim 4
Dependent Claim
40 words
The arm rest according to claim 1 in which said section of said post of smaller diameter is above said section of larger diameter, said section of larger diameter having a length substantially equal to the height of said clutch.
Claim 5
Dependent Claim
29 words
The arm rest according to claim 3 further including means operable to prevent axial movement of said arm and clutch beyond said section of said post of smaller diameter.
Claim 6
Dependent Claim
40 words
The arm rest according to claim 1 in which said arm rest has a socket depending therefrom and receiving the upper end portion of said post, and said one-way clutch being mounted within the lower end portion of said socket.
Claim 7
Dependent Claim
57 words
The arm rest according to claim 5 in which said socket also contains a filler ring comprising a bearing rotatably and slidably receiving the section of smaller diameter of said post and cooperating with said clutch when disposed upon the post section of larger diameter to prevent tilting of said arm when said bearing is thus positioned.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-03-27 | 1987-09-26 | 1988-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-27 | 1991-09-26 | 1992-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-27 | 1995-09-26 | 1996-03-27 | $7700.00 | Window Closed / Lapsed |