Tool driving or impacting – Including means to vibrationally isolate a drive means from... – Handle type holder
Patent
1993-12-30
1995-10-31
Smith, Scott A.
Tool driving or impacting
Including means to vibrationally isolate a drive means from...
Handle type holder
173211, 1731621, 29 8111, 29 8116, B25D 1724, B23D 7902
Patent
active
054621275
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention is for a holder for a device having axially vibrating and/or beating tools, e.g. a device for removal of hard layers by axing using a mainly axially vibrating and/or beating chisel.
By axing one uses a chisel to cut away layers and material from a bedding. Axing is used in the building business during repair and maintenace work. By repair and maintenance of floors old floor material or floor beds must be removed. This bed can be e.g. concrete, so-called fluid putty or the like. For this purpose chisels are used, the working edges of which have a width of about 100 mm and the length of the chisel together with its vibration generating power machine is about 1 m. This unit is intended to be held by hand during working. As the material which shall be removed often is hard and strong and difficult to separate from its bedding, forceful vibrations together with beating of the chisel is required. This is obtained by using a power machine which is driven by a suitable motor which in the case of building work or other work which are fully or partly done indoor, suitably is an electric motor. The vibrating and beating of the machine brings with it considerable physical strains for the person doing the work and may bring with it temporary as well as chronic injuries. It also means that the time during which continuous work can be performed is very limited.
In order to reduce the incoveniences when using these kind of machines, various measures have been tried primarily concerning the design and material of the handles. It has been tried to make the handles which are directly fastened on to the power machine, resilient or elastic e.g. by making them from rubber having suitable properties. Even though certain improvements have hereby been achieved the results are far from satisfactory. In order to obtain the best result of the work and as rapid axing of the material to be removed as possible, it is important that beating and vibrations have the correct power and frequency. Also these factors are influenced by how the tool is handled by the operator, e.g. by the force with which the tool is forced against the floor.
SUMMARY OF THE INVENTION
One objection of the present invention is to avoid beating and vibrations being transferred from the machine to the operator. Another object of the invention is to obtain an ergonomically correct position of working which means that the operator can do his job standing with a straight back. Another object of the invention is to obtain a better function of the tool by achieving constant conditions of work. A device according to the invention compries one or more shock absorbers which are essentially parallel with the axial direction of the chisel, whereby the transfer of the movements of the tool to the handles are in principle eliminated and injuries caused by vibrations are avoided.
BRIEF DESCRIPTION OF THE INVENTION
The invention shall below be described more closely in connection with the embodiment shown in the figures.
FIG. 1 shows a device according to the invention with axing chisel, power machine and holding device with handle.
FIG. 2 shows the holding device with handle and support details.
FIG. 3 shows a section through the device of FIG. 1.
FIG. 4 shows a section of the holding device along the line 4--4 of FIG. 3.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
The device shown in FIG. 1 comprises an axing chisel 1 which at its lower end has a perpendicular edge 21. The chisel is attached to a power machine 2 of conventional kind which is powered by an electric motor. The device is attached to the fastening means or structure 3 by a fastening member 22 and an upper fastening member 10 which may also include vibration damping elements of conventional kind, e.g. rubber bushings. The holding means 3 is at its lower end movably connected to the lower ends 6,7 of two parallel shock absorbers 4, 5 via fastening means, so that the fastening means can turn around a shaft 24 between the shock absorbers. The upper parts
REFERENCES:
patent: 1898369 (1933-02-01), Hohmann et al.
patent: 2776653 (1957-01-01), Eaton
patent: 2904320 (1959-09-01), Salisbury et al.
patent: 3369614 (1968-02-01), Anthony
patent: 4402369 (1983-09-01), Nikitin et al.
patent: 5095600 (1992-03-01), Allan
LandOfFree
Holding device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Holding device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Holding device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1767048