FR2239639A1 - Mandrel for perforating undulating tubing for land drainage - by shearing off bosses on the inner surfaces of the profile - Google Patents
Mandrel for perforating undulating tubing for land drainage - by shearing off bosses on the inner surfaces of the profileInfo
- Publication number
- FR2239639A1 FR2239639A1 FR7426280A FR7426280A FR2239639A1 FR 2239639 A1 FR2239639 A1 FR 2239639A1 FR 7426280 A FR7426280 A FR 7426280A FR 7426280 A FR7426280 A FR 7426280A FR 2239639 A1 FR2239639 A1 FR 2239639A1
- Authority
- FR
- France
- Prior art keywords
- tubing
- undulating
- bosses
- mandrel
- profile
- 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.)
- Granted
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B11/00—Drainage of soil, e.g. for agricultural purposes
- E02B11/005—Drainage conduits
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
- B26F1/0015—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor specially adapted for perforating tubes
- B26F1/0053—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor specially adapted for perforating tubes by machining, e.g. cutting, grinding, projections on the tube wall
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Forests & Forestry (AREA)
- Agronomy & Crop Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Sink And Installation For Waste Water (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US38412173A | 1973-07-30 | 1973-07-30 |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2239639A1 true FR2239639A1 (en) | 1975-02-28 |
FR2239639B1 FR2239639B1 (fr) | 1978-08-11 |
Family
ID=23516127
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7426280A Granted FR2239639A1 (en) | 1973-07-30 | 1974-07-29 | Mandrel for perforating undulating tubing for land drainage - by shearing off bosses on the inner surfaces of the profile |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2239639A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2335329A1 (fr) * | 1975-12-19 | 1977-07-15 | Drostub Sa | Procede et appareil pour la fabrication de tuyaux d'irrigation goutte a goutte en matiere synthetique a double paroi |
-
1974
- 1974-07-29 FR FR7426280A patent/FR2239639A1/fr active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2335329A1 (fr) * | 1975-12-19 | 1977-07-15 | Drostub Sa | Procede et appareil pour la fabrication de tuyaux d'irrigation goutte a goutte en matiere synthetique a double paroi |
Also Published As
Publication number | Publication date |
---|---|
FR2239639B1 (fr) | 1978-08-11 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |