US3703147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Locking mechanism for vertically adjustable drawing boards
Assignee: SPACIO SYSTEM AB
•
Filing: 1971-04-27
•
Granted: 1972-11-21
•
Expires: 1991-04-27
Abstract
Abstract A parallel motion guiding mechanism supporting a drawing board and including two opposite levers is provided with a link between the levers pivotally connected with one of the levers and connected with the other lever for rotational movement and displacement longitudinally of the link. A locking mechanism is provided to optionally lock the link to said other lever in order to prevent a change of the mutual spacing of the levers and thereby to prevent movement of the parallel motion guiding mechanism.
Inventors
- 👤 Bror Olle Herbert Selander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:42
CPC Classifications
A; A47; A47B; A47B27/00; A47B27/18
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
112 words
A locking mechanism for vertically adjustable drawing boards, comprising a parallel motion guiding means including two opposite levers, means mounting said levers for vertical swinging movement, means mounting said drawing board on said parallel motion guiding means, a guide member on each of said levers, a pivoted link connected to one of said levers by the associated guide member for rotational movement in relation to the lever and connected to the other one of said levers by the associated guide member for rotational movement and displacement longitudinally of said link in relation to the lever, and manually operable means for optionally preventing displacement of said link in relation to said other lever.
Claim 2
Dependent Claim
112 words
A locking mechanism for vertically adjustable drawing boards, comprising a parallel motion guiding means including two opposite levers, means mounting said levers for vertical swinging movement, means mounting said drawing board on said parallel motion guiding means, a guide member on each of said levers, a pivoted link connected to one of said levers by the associated guide member for rotational movement in relation to the lever and connected to the other one of said levers by the associated guide member for rotational movement and displacement longitudinally of said link in relation to the lever, and manually operable means for optionally preventing displacement of said link in relation to said other lever.
Claim 3
Dependent Claim
112 words
A locking mechanism for vertically adjustable drawing boards, comprising a parallel motion guiding means including two opposite levers, means mounting said levers for vertical swinging movement, means mounting said drawing board on said parallel motion guiding means, a guide member on each of said levers, a pivoted link connected to one of said levers by the associated guide member for rotational movement in relation to the lever and connected to the other one of said levers by the associated guide member for rotational movement and displacement longitudinally of said link in relation to the lever, and manually operable means for optionally preventing displacement of said link in relation to said other lever.
Claim 4
Dependent Claim
112 words
A locking mechanism for vertically adjustable drawing boards, comprising a parallel motion guiding means including two opposite levers, means mounting said levers for vertical swinging movement, means mounting said drawing board on said parallel motion guiding means, a guide member on each of said levers, a pivoted link connected to one of said levers by the associated guide member for rotational movement in relation to the lever and connected to the other one of said levers by the associated guide member for rotational movement and displacement longitudinally of said link in relation to the lever, and manually operable means for optionally preventing displacement of said link in relation to said other lever.
Claim 5
Dependent Claim
39 words
A locking mechanism as claimed in claim 1 wherein one of the guide members for the link is provided at the end of one of said levers the other one being provided between the ends of the other lever.
References Cited (Backward Citations)
US3089275A
Cited
US3079726A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-11-21 | 1976-05-22 | 1976-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-21 | 1980-05-22 | 1980-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-21 | 1984-05-22 | 1984-11-21 | $7700.00 | Window Closed / Lapsed |