FR640884A - Cric de levage - Google Patents
Cric de levageInfo
- Publication number
- FR640884A FR640884A FR640884DA FR640884A FR 640884 A FR640884 A FR 640884A FR 640884D A FR640884D A FR 640884DA FR 640884 A FR640884 A FR 640884A
- Authority
- FR
- France
- Prior art keywords
- lifting jack
- jack
- lifting
- 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.)
- Expired
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/50—Component parts or details of props
- E21D15/51—Component parts or details of props specially adapted to hydraulic, pneumatic, or hydraulic-pneumatic props, e.g. arrangements of relief valves
- E21D15/515—Particular fluids not covered by any chemical subdivision
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
- B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
- B66F3/25—Constructional features
- B66F3/42—Constructional features with self-contained pumps, e.g. actuated by hand
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR640884T | 1927-02-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR640884A true FR640884A (fr) | 1928-07-24 |
Family
ID=8997762
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR640884D Expired FR640884A (fr) | 1927-02-25 | 1927-02-25 | Cric de levage |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR640884A (fr) |
-
1927
- 1927-02-25 FR FR640884D patent/FR640884A/fr not_active Expired
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