FR2376940A1 - Safety ladder with tubular rungs - has ribs on stringers protruding into rungs with bolts to prevent rotation - Google Patents
Safety ladder with tubular rungs - has ribs on stringers protruding into rungs with bolts to prevent rotationInfo
- Publication number
- FR2376940A1 FR2376940A1 FR7700952A FR7700952A FR2376940A1 FR 2376940 A1 FR2376940 A1 FR 2376940A1 FR 7700952 A FR7700952 A FR 7700952A FR 7700952 A FR7700952 A FR 7700952A FR 2376940 A1 FR2376940 A1 FR 2376940A1
- Authority
- FR
- France
- Prior art keywords
- rungs
- stringers
- ribs
- protruding
- tubular
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C7/00—Component parts, supporting parts, or accessories
- E06C7/08—Special construction of longitudinal members, or rungs or other treads
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ladders (AREA)
Abstract
The safety ladder has tubular rungs fixed to the stringers so that they cannot rotate. The stringers (1) are fitted with a rib (2), or more than one, on the inside of their walling sections, protruding into the tubular space, or they fit securely on pre-formed or previously work-end ends on the rungs (3). The rungs are fixed by screw bolts (5) or plug pins passing through the profiled walling on the stringer. The ribs may be in pairs, with the ends of the rungs engaging between them. There may be a third intermediate rib, engaging a recess in the end of the rung.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7700952A FR2376940A1 (en) | 1977-01-10 | 1977-01-10 | Safety ladder with tubular rungs - has ribs on stringers protruding into rungs with bolts to prevent rotation |
FR7716630A FR2392214A2 (en) | 1977-01-10 | 1977-05-24 | Safety ladder with tubular rungs - has ribs on stringers protruding into rungs with bolts to prevent rotation |
DE19782800793 DE2800793A1 (en) | 1977-01-10 | 1978-01-09 | SECURITY MANAGER |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7700952A FR2376940A1 (en) | 1977-01-10 | 1977-01-10 | Safety ladder with tubular rungs - has ribs on stringers protruding into rungs with bolts to prevent rotation |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2376940A1 true FR2376940A1 (en) | 1978-08-04 |
Family
ID=9185468
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7700952A Withdrawn FR2376940A1 (en) | 1977-01-10 | 1977-01-10 | Safety ladder with tubular rungs - has ribs on stringers protruding into rungs with bolts to prevent rotation |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2376940A1 (en) |
-
1977
- 1977-01-10 FR FR7700952A patent/FR2376940A1/en not_active Withdrawn
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |