GB1259328A - - Google Patents
Info
- Publication number
- GB1259328A GB1259328A GB1259328DA GB1259328A GB 1259328 A GB1259328 A GB 1259328A GB 1259328D A GB1259328D A GB 1259328DA GB 1259328 A GB1259328 A GB 1259328A
- Authority
- GB
- United Kingdom
- Prior art keywords
- fluid
- chamber
- valve
- pressure
- throttle
- 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
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Percussive Tools And Related Accessories (AREA)
Abstract
1,259,328. Percussive tools. GARDNERDENVER CO. 6 Oct., 1969 [16 June, 1969], No. 49025/69. Heading B4C. A percussive tool comprises a hammer piston 16 reciprocable in a cylinder 12, a distributing valve 24 for alternately directing pressure fluid supplied via pipe 28 into chambers 56, 80, and a throttle for reducing the flow of fluid to the distributing valve actuable in response to fluid in chamber 56 reaching a predetermined pressure. When this pressure is reached, i.e. when tool bit 52 is subject to a " no-load " condition, check valve 60 will be opened to permit the fluid to flow into chamber 72 and thus move throttle member 74 to throttle the flow of fluid via passages 30, 32, 34. In an alternative embodiment (Fig. 2, not shown), the fluid from chamber (56) when the predetermined pressure is reached, flows past a check valve (92) and actuates a valve (96) to connect chamber (98) housing the throttle member (102) to a source of pressure fluid. In the inoperative condition of the valve (96) the chamber (98) is connected to atmosphere.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US83343169A | 1969-06-16 | 1969-06-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1259328A true GB1259328A (en) | 1972-01-05 |
Family
ID=25264397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1259328D Expired GB1259328A (en) | 1969-06-16 | 1969-10-06 |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JPS4844541B1 (en) |
| DE (2) | DE2020504A1 (en) |
| FR (1) | FR2052256A5 (en) |
| GB (1) | GB1259328A (en) |
| SE (1) | SE384646B (en) |
| ZA (1) | ZA697053B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU945412A2 (en) * | 1978-12-27 | 1982-07-23 | Ордена Трудового Красного Знамени институт гидродинамики СО АН СССР | Percussive device |
-
1969
- 1969-10-06 GB GB1259328D patent/GB1259328A/en not_active Expired
- 1969-10-07 ZA ZA697053A patent/ZA697053B/en unknown
- 1969-11-25 FR FR6940561A patent/FR2052256A5/fr not_active Expired
- 1969-11-27 JP JP44095347A patent/JPS4844541B1/ja active Pending
-
1970
- 1970-01-08 SE SE7000165A patent/SE384646B/en unknown
- 1970-04-27 DE DE19702020504 patent/DE2020504A1/en active Pending
- 1970-04-27 DE DE7015794U patent/DE7015794U/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| ZA697053B (en) | 1971-05-27 |
| JPS4844541B1 (en) | 1973-12-25 |
| DE2020504A1 (en) | 1971-01-07 |
| FR2052256A5 (en) | 1971-04-09 |
| DE7015794U (en) | 1972-10-12 |
| SE384646B (en) | 1976-05-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |