Claims
- 1. A hand held impact device comprising:
- a housing having an impact mechanism located therein, a front opening for receiving the shank of a working tool, and a working tool retaining means,
- a sleeve shaped maneuver handle for receiving the working tool shank therethrough for manual guidance of the working tool, said sleeve shaped maneuver handle having an internal diameter at least as large as the diameter of said tool shank opening of said housing and larger than the diameter of the working tool shank passing therethrough, and being freely manually displaceable along the shank of the working tool during working, and
- releasable coupling means selectively coupling said maneuver handle to said housing such that said housing releasably supports said maneuver handle in coaxial relationship with said tool shank opening with said tool shank passing through said sleeve shaped maneuver handle,
- said sleeve shaped maneuver handle comprising a flexible portion extending ahead of said releasable coupling means in the working direction and which is manually compressible into contact with the working took shank, said flexible portion comprising at least one vibration insulating element for insulating an operator from vibrations of the working tool.
- 2. An impact device according to claim 1, wherein said releasable coupling means comprises:
- a cylindrical neck portion of said housing coaxially surrounding said tool shank opening,
- a rear cylindrical recess in said maneuver handle matching said neck portion for receiving said neck portion therein, and
- retaining means for releasably retaining said maneuver handle relative to said neck portion.
- 3. An impact device according to claim 2, wherein said retaining means comprises an annular groove on said neck portion, and a number of spring biased balls carried by said maneuver handle, said balls being arranged to engage said annular groove as the maneuver handle is supported by said neck portion, thereby forming a snap coupling.
- 4. An impact device according to claim 2, wherein said maneuver handle comprises a cylindrical socket member which forms said cylindrical recess, and said flexible portion comprises a resilient sleeve which, at least partly, surrounds said socket member, said resilient sleeve comprising said at least one vibration insulating element.
- 5. An impact device according to claim 4, wherein said resilient sleeve extends ahead of said socket member in the working direction and is manually compressible for providing a friction grip between said sleeve and the working tool shank.
- 6. An impact device according to claim 5, wherein said extending portion of said resilient sleeve has a longitudinally directed slot therein to facilitate compression thereof.
- 7. An impact device according to claim 3, wherein said spring biased balls are carried by the portion of said maneuver handle defining said rear cylindrical recess.
- 8. An impact device according to claim 7, comprising at least one opening in said portion of said maneuver handle defining said rear cylindrical recess for receiving said balls therein, and a rubber band means over said at least one opening for biasing said balls toward said annular groove.
- 9. An impact device according to claim 3, wherein said maneuver handle comprises a cylindrical socket member which forms said cylindrical recess, and said flexible portion comprises a resilient sleeve which, at least partly, surrounds said socket member, said resilient sleeve comprising said at least one vibration insulating element.
- 10. An impact device according to claim 9, wherein said resilient sleeve extends ahead of said socket member in the working direction and is manually compressible for providing friction grip between said sleeve and the working tool shank.
- 11. An impact device according to claim 10, wherein said extending portion of said resilient sleeve has a longitudinally directed slot therein to facilitate compression thereof.
Priority Claims (1)
| Number |
Date |
Country |
Kind |
| 046276 |
Apr 1975 |
SW |
|
Parent Case Info
This invention relates to a hand held impact device of the type comprising a housing in which there is located an impact mechanism and which housing is provided with a front opening for receiving the shank of a working tool.
Particularly, the invention relates to a hand held impact device in which the operator holds and guides by hand the working tool, for instance a chisel hammer.
When working with such machines the operator is exposed to serious, unhealthy, vibrations, especially in the hand by which he holds and guides the working tool.
According to previous attempts to solve this problem the shank of the working tool has been provided with different types of vibration insulating means. These have been unsatisfactory in that they have not been able to be promptly secured relative to the tool, and because they have caused functional problems. Moreover, these previous devices have offered a very limited protection against vibrations and they have resulted in increased working tool costs.
The present invention intends to solve the above problems in such a way that the drawbacks of the previous solutions are avoided. This is obtained by a device according to the invention as defined by the claims.
US Referenced Citations (17)
Foreign Referenced Citations (1)
| Number |
Date |
Country |
| 77,382 |
May 1933 |
SW |
Patent Grant
4081038
