US3896744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Height-adjustable desk
Assignee: Individual
•
Filing: 1973-06-08
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Granted: 1975-07-29
•
Expires: 1993-06-08
Abstract
Abstract A height-adjusting mechanism for a desk consisting of a support tube connected to the base of the desk, a sliding tube telescopically mounted with respect to the support tube and connected to the top of the desk and a lever-activated clamping tube located between the sliding and support tubes, said clamping tube having a clamping ring that engages and holds the sliding tube in place when the tube is in clamping position and that releases the sliding tube for adjustment when moved by the lever to its release position. Spring means are further provided for biasing the clamping tube toward clamping position.
Inventors
- 👤 Adolf Otto Goebl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:50
CPC Classifications
A; A47; A47B; A47B41/00; A47B41/02; A47B9/00; A47B9/08
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
184 words
A height-adjustable desk comprising a base portion and a top portion, a pair of support tubes mounted on the base portion, a sliding tube concentrically mounted for telescoping movement with respect to each of the support tubes and connected to the top portion of the desk, a clamping tube located between said sliding and support tubes and mounted for movement between a clamping position and a release position, clamping means mounted on each of said clamping tubes for gripping the sliding tube to hold it in place when the clamping tube is in clamping position and for releasing the sliding tube when the clamping tube is in release position, spring means for biasing each of the clamping tubes toward clamping position, lever means for moving the clamping tubes toward release position so that the top portion can be adjusted to the desired height, said moving means comprising a pair of lever arms pivotally mounted on the base portion of the desk, each of said arms having a portion disposed to engage the associated clamping tube to push it upwardly and disengage the clamping means.
Claim 2
Dependent Claim
184 words
A height-adjustable desk comprising a base portion and a top portion, a pair of support tubes mounted on the base portion, a sliding tube concentrically mounted for telescoping movement with respect to each of the support tubes and connected to the top portion of the desk, a clamping tube located between said sliding and support tubes and mounted for movement between a clamping position and a release position, clamping means mounted on each of said clamping tubes for gripping the sliding tube to hold it in place when the clamping tube is in clamping position and for releasing the sliding tube when the clamping tube is in release position, spring means for biasing each of the clamping tubes toward clamping position, lever means for moving the clamping tubes toward release position so that the top portion can be adjusted to the desired height, said moving means comprising a pair of lever arms pivotally mounted on the base portion of the desk, each of said arms having a portion disposed to engage the associated clamping tube to push it upwardly and disengage the clamping means.
Claim 3
Dependent Claim
20 words
The desk of claim 1, wherein said lever arms simultaneously move the clamping tubes in the pair of support tubes.
Claim 4
Dependent Claim
37 words
The desk of claim 1 in which a pair of pivot pins is carried by said base portion,, and each lever arm engages a pivot pin intermediate the ends thereof whereby said pins act as fulcrum points.
Claim 5
Dependent Claim
23 words
The desk of claim 3 in which said other ends engage the clamping tubes and also form lower limits for the sliding tubes.
Claim 6
Dependent Claim
37 words
The desk of claim 3 in which each support tube has an opening adjacent the bottom end thereof and said other end of the associated lever arm extends through said opening into engagement with the clamping tube.
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) | 1978-07-28 | 1979-01-27 | 1979-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-28 | 1983-01-27 | 1983-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-28 | 1987-01-27 | 1987-07-29 | $7700.00 | Window Closed / Lapsed |