FR2398581A1 - Valve for pneumatic drill - has inset trigger displacing piston rod which pivots conical plug located in air feed pipe - Google Patents
Valve for pneumatic drill - has inset trigger displacing piston rod which pivots conical plug located in air feed pipeInfo
- Publication number
- FR2398581A1 FR2398581A1 FR7724127A FR7724127A FR2398581A1 FR 2398581 A1 FR2398581 A1 FR 2398581A1 FR 7724127 A FR7724127 A FR 7724127A FR 7724127 A FR7724127 A FR 7724127A FR 2398581 A1 FR2398581 A1 FR 2398581A1
- Authority
- FR
- France
- Prior art keywords
- pivots
- trigger
- piston rod
- feed pipe
- inset
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D17/00—Details of, or accessories for, portable power-driven percussive tools
- B25D17/04—Handles; Handle mountings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
- B25D9/14—Control devices for the reciprocating piston
- B25D9/16—Valve arrangements therefor
- B25D9/24—Valve arrangements therefor involving a rocking-plate type valve
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Percussive Tools And Related Accessories (AREA)
Abstract
The trigger-operated valve may be incorporated in the handle (3) of a pneumatic drill and controls the incoming supply (25) of compressed air. The handle is of deformable material and has a slot-mouthed cavity (5) locating the trigger (6). The trigger floats and pivots within the cavity, is forcefully installed through the slot-mouth, and is depressed to displace a piston rod (8) which pivots a plug (10). The plug may be of a truncated cone form and locates in the feed pipe (9) at an axial reduction in dia. effected by a radial step. The plug end of largest dia. has a concentric demi-round section circular lip (14) which bears on the annular faces of the step to seal the inlet (15).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7724127A FR2398581A1 (en) | 1977-07-29 | 1977-07-29 | Valve for pneumatic drill - has inset trigger displacing piston rod which pivots conical plug located in air feed pipe |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7724127A FR2398581A1 (en) | 1977-07-29 | 1977-07-29 | Valve for pneumatic drill - has inset trigger displacing piston rod which pivots conical plug located in air feed pipe |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2398581A1 true FR2398581A1 (en) | 1979-02-23 |
FR2398581B1 FR2398581B1 (en) | 1983-01-07 |
Family
ID=9194262
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7724127A Granted FR2398581A1 (en) | 1977-07-29 | 1977-07-29 | Valve for pneumatic drill - has inset trigger displacing piston rod which pivots conical plug located in air feed pipe |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2398581A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4258799A (en) * | 1979-11-27 | 1981-03-31 | Dresser Industries, Inc. | Inlet control valve |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1006378A (en) * | 1943-01-15 | 1952-04-22 | Hauhinco Maschf | Valve operated pneumatic hammer |
FR1183912A (en) * | 1957-10-04 | 1959-07-15 | Hauhinco Maschf | Compressed air hammer with elastic handle absorbs shocks and vibrations |
FR2154036A5 (en) * | 1971-09-17 | 1973-05-04 | Atlas Copco Ab | |
FR2385496A1 (en) * | 1977-03-28 | 1978-10-27 | Mekafor | Pneumatic drill with bit guide sleeve one end - has air distributor encased in shock absorbent casing other end |
-
1977
- 1977-07-29 FR FR7724127A patent/FR2398581A1/en active Granted
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1006378A (en) * | 1943-01-15 | 1952-04-22 | Hauhinco Maschf | Valve operated pneumatic hammer |
FR1183912A (en) * | 1957-10-04 | 1959-07-15 | Hauhinco Maschf | Compressed air hammer with elastic handle absorbs shocks and vibrations |
FR2154036A5 (en) * | 1971-09-17 | 1973-05-04 | Atlas Copco Ab | |
FR2385496A1 (en) * | 1977-03-28 | 1978-10-27 | Mekafor | Pneumatic drill with bit guide sleeve one end - has air distributor encased in shock absorbent casing other end |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4258799A (en) * | 1979-11-27 | 1981-03-31 | Dresser Industries, Inc. | Inlet control valve |
Also Published As
Publication number | Publication date |
---|---|
FR2398581B1 (en) | 1983-01-07 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |