GB1237892A - - Google Patents
Info
- Publication number
- GB1237892A GB1237892A GB1237892DA GB1237892A GB 1237892 A GB1237892 A GB 1237892A GB 1237892D A GB1237892D A GB 1237892DA GB 1237892 A GB1237892 A GB 1237892A
- Authority
- GB
- United Kingdom
- Prior art keywords
- piston
- cylinder
- exit
- chamber
- tool holder
- 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
- B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
- B25D9/06—Means for driving the impulse member
- B25D9/08—Means for driving the impulse member comprising a built-in air compressor, i.e. the tool being driven by air pressure
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drilling And Boring (AREA)
Abstract
1,237,892. Impacting apparatus. F. C. F. EVENNETT. 9 June, 1969 [17 June, 1968], No. 28734/68. Heading B4C. [Also in Divisions F1 and F2] Apparatus for applying vibrations to an associated apparatus, for oscillating a shaft about its axis, or for applying impacts to a tool comprises a cylinder a, and a piston b reciprocable in the cylinder. The chamber at each end of the cylinder has an exit openable and closable by a valve member, the valve members being so connected that when one exit is open the other is closed. A chamber f within the length of the piston and bounded by the piston and cylinder is in constant communication with a fluid supply port e and, via passages g, h, m, with the end chambers. The piston itself effects movement of the valve members. As illustrated the apparatus is a pneumatic drill and includes a tool holder d defining one end of the cylinder. The valve members o<SP>1</SP>, o<SP>2</SP> are interconnected by a tie-rod p. In the condition shown, the piston will move under air pressure in end chamber-” towards end cap c and will engage valve member o<SP>1</SP> to close exit l and open exit q. The piston will then move in the opposite direction. Annular chamber r coacts with an annular projection s on the piston to provide an air cushion. A resilient packing t is provided to absorb blows delivered by the piston to the tool holder. Reciprocation of the piston is controlled by adjustment of a sleeve valve u. Instead of the tool holder the cylinder a may be closed at its bottom end by an end cap similar to end cap c. The apparatus when so constructed will be used to impart vibrations to an associated apparatus to which it is connected, e.g. a sand sifter. Alternatively the piston may include a gear rack adapted to mesh with a gear mounted on a shaft passing through the cylinder wall so as to oscillate the shaft about its axis.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2873468 | 1968-06-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1237892A true GB1237892A (en) | 1971-06-30 |
Family
ID=10280253
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1237892D Expired GB1237892A (en) | 1968-06-17 | 1968-06-17 |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1237892A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102962818A (en) * | 2012-11-29 | 2013-03-13 | 张古权 | Electromechanical hammer |
CN109322234A (en) * | 2018-10-22 | 2019-02-12 | 广州鹏兴科技有限公司 | One kind being based on laborsaving angle road construction road surface grooving apparatus |
-
1968
- 1968-06-17 GB GB1237892D patent/GB1237892A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102962818A (en) * | 2012-11-29 | 2013-03-13 | 张古权 | Electromechanical hammer |
CN109322234A (en) * | 2018-10-22 | 2019-02-12 | 广州鹏兴科技有限公司 | One kind being based on laborsaving angle road construction road surface grooving apparatus |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PLNP | Patent lapsed through nonpayment of renewal fees |