Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1980-08-19
1983-11-01
Duggan, Donovan F.
Electrical generator or motor structure
Dynamoelectric
Rotary
310 51, 310 91, H02K 714
Patent
active
044131992
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to an electrical tooth cleaning apparatus, and, more particularly, to an electrical tooth cleaning apparatus in which the drive motor is fixedly held in position in the housing by means of a vibration dampening element.
In the tooth cleaning apparatus known from Swiss Patent No. 425,719, the drive motor is displaceably mounted at the rear housing portion and bears, on the one hand, at the front housing portion and, on the other hand, by means of a compression spring, at the base of the rear housing portion. Under the action of this compression spring, both of the housing portions, held together by a O-ring, are clamped together while compressing the O-ring. This results in a deformation of the O-ring which ensures a watertight closure. With this solution, the joining together of both housing portions is indeed relatively simple. However, certain constructional measures are still required for this purpose, such as the support of the motor at the front housing portion and the provision of a compression spring. These measures result in a more expensive fabrication and require a greater amount of time during assembly.
In U.S. Pat. No. 3,235,897 there is shown a solution wherein the drive motor has a protruding, rigid bead, which is fixedly clamped between both threadable interconnected housing portions. For sealing the housing interior, a sealing ring is inserted between the bead and the one housing portion, whereas at the opposite side, the bead bears directly at the other housing portion. The drive motor, which is fixed by means of the fixedly clamped bead in its fixedly determined position, is, however, rigidly mounted, so that the motor vibrations can be transmitted to the housing. Also, the relatively thin sealing ring is capable of changing very little as to these conditions.
SUMMARY AND OBJECTS OF THE INVENTION
The present invention therefore strives to overcome such drawbacks. It is thus an object of the present invention to provide a functionally positive, convenient to handle, tooth cleaning apparatus of the previously mentioned type, requiring virtually no maintenance, and which additionally can be assembled in a simple and time-saving manner.
By means of the oscillation dampening element which is fixedly retained in the housing, just as was the case for the last-mentioned prior art solution, the position of the drive motor within the housing is exactly fixed. Moreover, the motor is fixed in this position. However, the oscillation dampening element affords the additional advantage that the vibrations of the motor are not or are only to a limited degree transmitted to the housing. Hence, the operating comfort is increased. The vibration dampening element can additionally be constructed as a sealing element, which, with the vibration dampening element fixedly clamp between both of the housing portions, makes possible simultaneous sealing of the separation joint present between the housing portions.
A particularly simple assembly is then especially possible when both of the housing portions are connected with one another by means of a snap connection. This snap connection is preferably formed by cams at one housing portion and latching noses engaging therebehind at the other housing portion. By virtue of the vibration dampening element which is fixedly clamped between the housing portions, the parts of the snap connection are biased towards one another. Nonetheless, it is still possible to separate the housing portions from one another by releasing such snap connection without destroying the vibration dampening element, in the event repair work is needed to exchange elements arranged within the housing.
The assembly of the tooth cleaning apparatus is further simplified if at least the motor and, possibly, further components, are secured at a support element at which the ring-shaped vibration dampening element is mounted arranged in a circumferential groove.
If, as is known, a magnetically actuatable switch is mounted internally of the housin
REFERENCES:
patent: 3114807 (1963-12-01), Koda
patent: 3235897 (1966-02-01), Fortenberry
patent: 3316428 (1967-04-01), Hart
patent: 3733634 (1973-05-01), Golbe
Ault Anita M.
Duggan Donovan F.
Kleeman Werner W.
Trisa Burstenfabrik AG
LandOfFree
Electrical tooth cleaner apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electrical tooth cleaner apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electrical tooth cleaner apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2170387