FR2382985A1 - Hydraulic percussion tool with gas cell energy accumulator - has double piston and controls frequency and magnitude of applied force - Google Patents
Hydraulic percussion tool with gas cell energy accumulator - has double piston and controls frequency and magnitude of applied forceInfo
- Publication number
- FR2382985A1 FR2382985A1 FR7707730A FR7707730A FR2382985A1 FR 2382985 A1 FR2382985 A1 FR 2382985A1 FR 7707730 A FR7707730 A FR 7707730A FR 7707730 A FR7707730 A FR 7707730A FR 2382985 A1 FR2382985 A1 FR 2382985A1
- Authority
- FR
- France
- Prior art keywords
- hammer
- piston
- magnitude
- applied force
- gas
- 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- Withdrawn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
-
- 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
- B25D9/26—Control devices for adjusting the stroke of the piston or the force or frequency of impact thereof
Landscapes
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
Abstract
The percussion unit for bush hammering etc. is operated by hydraulic, and includes a gas-cell (19) energy-accumulator. The unit provides for the adjustment of both the frequency and the magnitude of the applied force. The unit has a compression piston (21) and a hammer-piston (14) within a cylindrical casing (11). A pressurised fluid feed system (1-9) which can vary the fluid pressure in the least one feed line, supplies hydraulic fluid to the casing (11). The gas-cell (19) between the compression piston and the rear of the hammer piston (14), may be formed by a tubular membrane (18), and compressed as the compression hammer (21) advances. A retaining mechanism holds the hammer piston (14), to release it when the gas is compressed, and thus, obtains the abrust projection of the hammer piston. The membrane (18) may be fixed to the rear of the hammer pistn and may locate within the bore of the casing and within an annular volume of oil (11c).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7707730A FR2382985A1 (en) | 1977-03-07 | 1977-03-07 | Hydraulic percussion tool with gas cell energy accumulator - has double piston and controls frequency and magnitude of applied force |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7707730A FR2382985A1 (en) | 1977-03-07 | 1977-03-07 | Hydraulic percussion tool with gas cell energy accumulator - has double piston and controls frequency and magnitude of applied force |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2382985A1 true FR2382985A1 (en) | 1978-10-06 |
Family
ID=9188119
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7707730A Withdrawn FR2382985A1 (en) | 1977-03-07 | 1977-03-07 | Hydraulic percussion tool with gas cell energy accumulator - has double piston and controls frequency and magnitude of applied force |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2382985A1 (en) |
-
1977
- 1977-03-07 FR FR7707730A patent/FR2382985A1/en not_active Withdrawn
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |