US5944387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustment mechanism for chairs
Assignee: Leggett and Platt Canada Co
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Filing: 1998-05-04
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Granted: 1999-08-31
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Expires: 2018-05-04
Abstract
Abstract A chair armrest bar is horizontally slidably received in a channel of a base attached to a chair seat. The base defines longitudinally arranged interconnected slots in its bottom wall. A locking lever is pivotably mounted to the armrest bar. The lever has a locking pin which is biased into one of the slots to lock the armrest in position; the lever may be tilted to an unlocking position to allow the bar to slide. The lever is releasably attached to the bar by a mount so that the lever may be removed to allow replacement of the bar.
Inventors
- 👤 William S. Stumpf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:20
CPC Classifications
A; A47; A47C; A47C7/00; A47C7/54; A47C7/541; A47C1/00; A47C1/02; A47C1/022; A47C1/03
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
138 words
An adjustment mechanism for a chair comprising: a base; an adjustable member; one of said base and said adjustable member defining a channel, the other of said base and said adjustable member comprising a bar slidably received by said channel; locking lever pivotally mounted to a mount; a releasable attachment releasably attaching said mount to said bar; one of said base and said locking lever having a plurality of slots arranged longitudinally; the other of said base and said locking lever having a locking pin configured for locking reception in one said slots when said locking lever is in a locking position; and a resilient member to bias said lever towards said locking position, and wherein said bar defines an aperture and wherein said mount comprises a post received by said aperture and joined to said releasable attachment.
Claim 2
Dependent Claim
138 words
An adjustment mechanism for a chair comprising: a base; an adjustable member; one of said base and said adjustable member defining a channel, the other of said base and said adjustable member comprising a bar slidably received by said channel; locking lever pivotally mounted to a mount; a releasable attachment releasably attaching said mount to said bar; one of said base and said locking lever having a plurality of slots arranged longitudinally; the other of said base and said locking lever having a locking pin configured for locking reception in one said slots when said locking lever is in a locking position; and a resilient member to bias said lever towards said locking position, and wherein said bar defines an aperture and wherein said mount comprises a post received by said aperture and joined to said releasable attachment.
Claim 3
Dependent Claim
50 words
The adjustment mechanism of claim 1 wherein a portion of said mount abuts a face of said bar, said post protrudes through said bar past an opposite face of said bar and said releasable attachment is joined to a protruding end of said post and bears against said opposite face.
Claim 4
Dependent Claim
22 words
The adjustment mechanism of claim 2 wherein said releasable attachment comprises a cap adapted for engaging said protruding end of said post.
Claim 5
Dependent Claim
18 words
The adjustment mechanism of claim 3 wherein said post terminates in spring fingers to which said cap snaps.
Claim 6
Dependent Claim
21 words
The adjustment mechanism of claim 4 wherein said aperture in said bar, said post and said cap have square cross sections.
Claim 7
Dependent Claim
20 words
The adjustment mechanism of claim 2 where said base defines said slots and said locking lever comprises said locking pin.
Claim 8
Dependent Claim
17 words
The adjustment mechanism of claim 6 wherein said slots are longitudinally arranged and interconnected by guide channels.
Claim 9
Dependent Claim
59 words
The adjustment mechanism of claim 7 where said locking pin has a guide portion with a rectangular cross section having a width smaller than a width of said guide channels, said guide portion being within said slots when said locking lever is in an unlocking position such that said guide portion is slidable between slots through said guide channels.
Claim 10
Dependent Claim
22 words
The adjustment mechanism of claim 7 wherein said slots comprise a plurality of longitudinally arranged circular apertures interrupted by parallel-sided guide channels.
Claim 11
Dependent Claim
41 words
The adjustment mechanism of claim 7 wherein the locking pin has a locking portion having a shape complementary to that of said slots, said locking portion received by one of said slots when said locking lever is in said locking position.
Claim 12
Dependent Claim
14 words
The adjustment mechanism of claim 10 where said resilient member is a leaf spring.
Claim 13
Dependent Claim
96 words
A horizontal adjustment mechanism for a chair armrest, comprising: a base for attachment to a chair seat, said base defining a channel; an armrest bar slidably received by said base channel; a locking lever pivotally mounted to a mount; a releasable attachment releasably attaching said mount to said armrest bar; said base defining a plurality of longitudinally arranged slots; said locking lever having a locking pin configured for locking reception in one of said slots when said locking lever is in a locking position; and a resilient member to bias said lever towards said locking position.
Claim 14
Dependent Claim
96 words
A horizontal adjustment mechanism for a chair armrest, comprising: a base for attachment to a chair seat, said base defining a channel; an armrest bar slidably received by said base channel; a locking lever pivotally mounted to a mount; a releasable attachment releasably attaching said mount to said armrest bar; said base defining a plurality of longitudinally arranged slots; said locking lever having a locking pin configured for locking reception in one of said slots when said locking lever is in a locking position; and a resilient member to bias said lever towards said locking position.
Claim 15
Dependent Claim
30 words
The horizontal adjustment mechanism of claim 12 wherein said bar defines an aperture and wherein said mount comprises a post protruding through said aperture and joined to said releasable attachment.
Claim 16
Dependent Claim
35 words
The horizontal adjustment mechanism of claim 13 wherein said releasable attachment bears against a top surface of said armrest bar to hold a portion of said mount against a bottom face of said armrest bar.
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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) | 2002-08-30 | 2003-03-01 | 2003-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-08-30 | 2007-03-01 | 2007-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-08-30 | 2011-03-01 | 2011-08-31 | $7700.00 | Window Closed / Lapsed |