GB1358674A - Percussion apparatus - Google Patents
Percussion apparatusInfo
- Publication number
- GB1358674A GB1358674A GB27673A GB27673A GB1358674A GB 1358674 A GB1358674 A GB 1358674A GB 27673 A GB27673 A GB 27673A GB 27673 A GB27673 A GB 27673A GB 1358674 A GB1358674 A GB 1358674A
- Authority
- GB
- United Kingdom
- Prior art keywords
- piston
- air
- cylinder
- ports
- compressed
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D11/00—Portable percussive tools with electromotor or other motor drive
- B25D11/06—Means for driving the impulse member
- B25D11/12—Means for driving the impulse member comprising a crank mechanism
- B25D11/125—Means for driving the impulse member comprising a crank mechanism with a fluid cushion between the crank drive and the striking body
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Percussive Tools And Related Accessories (AREA)
Abstract
1358674 Percussive tools YAMADA JUKI KK 2 Jan 1973 [25 March 1972] 276/73 Heading B4C A percussive tool comprises a hammer piston 27, 30 free to move in cylinder 21 under the influence of air cushions developed when the cylinder is reciprocated by a rotary mechanism 17, the pressure chamber above the piston being considerably greater in volume than the one below. The crank-shaft 16 shown is turned by a gear-wheel 18 driven through a flexible drive shaft by an external I.C. engine or electric motor. A chisel 31 may be resiliently mounted and struck by the hammer piston; alternatively, the impact tool may be a ramming stamp which is attached to the hammer piston. The cylinder 21 can communicate with atmosphere via ports 25, 26 when opened by the passage of the piston. During an upstroke of the cylinder 21 with the lower ports 26 closed, the air is compressed in the lower chamber until the cushion of air is such as to move the piston on its upstroke to close the upper ports 25 and compress the air trapped in the upper chamber. During the downstroke of the cylinder 21, compression of the air above the piston is completed before the piston is compelled to move downwardly on its working stroke by the compressed cushion of air. As soon as the lower ports 26 are closed, the air trapped in the lower chamber begins to be compressed. The ports may be replaced by a single large port or a slot. Handles 37 are resiliently-mounted on buffer springs 35. The rotary mechanism on the tool may be a cam or eccentric instead of the crank shown.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP47029888A JPS5139161B2 (en) | 1972-03-25 | 1972-03-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1358674A true GB1358674A (en) | 1974-07-03 |
Family
ID=12288495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB27673A Expired GB1358674A (en) | 1972-03-25 | 1973-01-02 | Percussion apparatus |
Country Status (21)
| Country | Link |
|---|---|
| JP (1) | JPS5139161B2 (en) |
| AR (1) | AR194033A1 (en) |
| BE (1) | BE797153A (en) |
| CA (1) | CA973035A (en) |
| CH (1) | CH553628A (en) |
| DD (1) | DD101591A5 (en) |
| ES (1) | ES411670A1 (en) |
| FI (1) | FI60152C (en) |
| FR (1) | FR2177742B1 (en) |
| GB (1) | GB1358674A (en) |
| IE (1) | IE37177B1 (en) |
| IL (1) | IL41407A (en) |
| IS (1) | IS1013B6 (en) |
| IT (1) | IT980678B (en) |
| LU (1) | LU67278A1 (en) |
| MY (1) | MY7500038A (en) |
| NL (1) | NL7304213A (en) |
| OA (1) | OA04353A (en) |
| PH (1) | PH11678A (en) |
| SE (1) | SE387065B (en) |
| ZA (1) | ZA731888B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU602218B2 (en) * | 1987-06-17 | 1990-10-04 | Yamada Machinery Industrial Co., Ltd. | Rotary impacting apparatus |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50125866U (en) * | 1974-03-12 | 1975-10-15 | ||
| JPS608641Y2 (en) * | 1978-04-06 | 1985-03-28 | カワサキ機工株式会社 | Powered deep plow hoe |
| DE3068869D1 (en) * | 1980-06-12 | 1984-09-13 | Black & Decker Inc | Power operated tool including a mechanism for converting rotary motion to reciprocatory motion |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE255977C (en) * | ||||
| GB191203153A (en) * | 1912-02-08 | 1913-01-02 | Thomas Ritson | Improved Means for Compressing Springs, the same being especially applicable for use in connection with the Valve Springs of Internal Combustion Engines. |
-
1972
- 1972-03-25 JP JP47029888A patent/JPS5139161B2/ja not_active Expired
-
1973
- 1973-01-02 GB GB27673A patent/GB1358674A/en not_active Expired
- 1973-01-26 IL IL41407A patent/IL41407A/en unknown
- 1973-01-30 AR AR246355A patent/AR194033A1/en active
- 1973-02-01 IE IE166/73A patent/IE37177B1/en unknown
- 1973-02-05 DD DD168664A patent/DD101591A5/xx unknown
- 1973-02-09 FR FR7304723A patent/FR2177742B1/fr not_active Expired
- 1973-02-15 ES ES411670A patent/ES411670A1/en not_active Expired
- 1973-02-19 IS IS2140A patent/IS1013B6/en unknown
- 1973-02-19 CH CH252773A patent/CH553628A/en not_active IP Right Cessation
- 1973-02-26 FI FI570/73A patent/FI60152C/en active
- 1973-03-12 PH PH14415A patent/PH11678A/en unknown
- 1973-03-19 ZA ZA731888A patent/ZA731888B/en unknown
- 1973-03-21 OA OA54860A patent/OA04353A/en unknown
- 1973-03-22 BE BE129107A patent/BE797153A/en not_active IP Right Cessation
- 1973-03-23 LU LU67278A patent/LU67278A1/xx unknown
- 1973-03-23 CA CA166,838A patent/CA973035A/en not_active Expired
- 1973-03-23 SE SE7304134A patent/SE387065B/en unknown
- 1973-03-23 IT IT67837/73A patent/IT980678B/en active
- 1973-03-26 NL NL7304213A patent/NL7304213A/xx not_active Application Discontinuation
-
1975
- 1975-12-30 MY MY38/75A patent/MY7500038A/en unknown
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU602218B2 (en) * | 1987-06-17 | 1990-10-04 | Yamada Machinery Industrial Co., Ltd. | Rotary impacting apparatus |
| US5002134A (en) * | 1987-06-17 | 1991-03-26 | Yamada Juki Co., Ltd. | Rotary impacting apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| AR194033A1 (en) | 1973-06-12 |
| ES411670A1 (en) | 1976-01-01 |
| DD101591A5 (en) | 1973-11-12 |
| BE797153A (en) | 1973-07-16 |
| FI60152C (en) | 1981-12-10 |
| FI60152B (en) | 1981-08-31 |
| ZA731888B (en) | 1974-01-30 |
| IL41407A (en) | 1975-07-28 |
| DE2300388B2 (en) | 1975-07-24 |
| IL41407A0 (en) | 1973-03-30 |
| IS2140A7 (en) | 1973-03-23 |
| NL7304213A (en) | 1973-09-27 |
| MY7500038A (en) | 1975-12-31 |
| CA973035A (en) | 1975-08-19 |
| FR2177742B1 (en) | 1975-10-31 |
| IE37177L (en) | 1973-09-25 |
| OA04353A (en) | 1980-01-31 |
| CH553628A (en) | 1974-09-13 |
| FR2177742A1 (en) | 1973-11-09 |
| DE2300388A1 (en) | 1973-10-04 |
| AU5165873A (en) | 1974-08-01 |
| LU67278A1 (en) | 1973-05-28 |
| JPS4896402A (en) | 1973-12-10 |
| SE387065B (en) | 1976-08-30 |
| JPS5139161B2 (en) | 1976-10-26 |
| IS1013B6 (en) | 1979-09-14 |
| IT980678B (en) | 1974-10-10 |
| IE37177B1 (en) | 1977-05-25 |
| PH11678A (en) | 1978-05-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PLNP | Patent lapsed through nonpayment of renewal fees | ||
| 427A | Application made for restoration (sect. 27/1949) | ||
| 427C | Application for amendment of specification now open to opposition (sect. 27/1949) | ||
| 728A | Order made restoring the patent (sect. 28/1977) | ||
| PE20 | Patent expired after termination of 20 years |
Effective date: 19921231 |