Seal for a joint or juncture – Seal between relatively movable parts – Circumferential contact seal for other than piston
Utility Patent
1999-11-10
2001-01-02
DePumpo, Daniel G. (Department: 3611)
Seal for a joint or juncture
Seal between relatively movable parts
Circumferential contact seal for other than piston
C277S572000, C277S573000
Utility Patent
active
06168165
ABSTRACT:
BACKGROUND OF THE INVENTION
This application relates a semi-integrated sealing system for a transmission case of automotive vehicles, which has been developed to provide a better performance and utilization, as well as more economy and other benefits in comparison to other similar sealing systems.
The most traditional sealing system for the transmission case of automotive vehicles consists of a sealing set made essentially of a device flange assembled on the transmission block (transmission case), a radial sealing retainer placed around the shaft and assembled on the flange by pressing, and a static sealing element, such as a cardboard, paste or another joint for sealing between the flange faces and the transmission block upon the transmission block fixing operation.
In spite of the large utilization of the set as described above, some inconveniences may occur, such as:
The flange, radial retainer and static sealing element, which compose the traditional set, are parts originally separated from one another and they are generally supplied to transmission block (case) manufacturers and/or vehicle assembling plants by different suppliers and have to be assembled together at the mentioned plants before being used in the assembling lines.
Such method of supplying the sealing sets results in the increase of the already large number of items that are contained in a vehicle and/or in a transmission case causing an increase in administrative procedures for supplying the assembly line, such as control of inventory, purchase, quality and others. The above-described usual sealing set, consisting of parts originally separated, requires pre-assembly of its parts before the use in the vehicle and/or transmission case manufacturing line, thus resulting in assembling sub-levels in assembling plants, which is incompatible with the automation level reached and/or intended for these production processes.
Another inconvenience observed when using the above traditional sealing set is due to the fact that, once assembled, it is difficult to find out the origin of and/or responsibility for eventual defects, since they can originate in the parts that constitute the set and/or in its assembly carried out at the plant using the final set.
On the other hand, with regard to the spare parts market, the traditional sealing set also causes some inconveniences, as generally it is applied to automotive vehicles at repair shops, which in the great majority may not have on hand all the resources necessary to perform a good assembly job, which may result in defects.
This is particularly observed as such traditional sets do not allow any control over the static sealing element that is between the flange and the transmission block during assembly, and for this reason the interstice in that area cannot be adequately sealed, leaving room for leakages.
Another aspect of the traditional sealing sets that may cause a defective assembly, when not all the adequate resources are used, is that the retainers of these traditional sealing sets have a radial sealing rim that seals directly against the shaft. Therefore, if the retainer is not precisely assembled in the flange housing and around the shaft, leakages may occur.
SUMMARY OF THE INVENTION
In view of the above problems and the intention to overcome them, the semi-integrated sealing system was developed, and it consists mainly of an assembling flange, a rubber static sealing thread, originally incorporated in the flange facing the transmission block, and a cartridge type retainer that is assembled in the flange housing and around the shaft of the transmission case outlet.
REFERENCES:
patent: 3917286 (1975-11-01), Loyd
patent: 4345770 (1982-08-01), Seeh
patent: 4435096 (1984-03-01), Petros
patent: 4437821 (1984-03-01), Ogawa
patent: 4928980 (1990-05-01), Deuring
patent: 5096207 (1992-03-01), Seeh et al.
patent: 5129744 (1992-07-01), Otto et al.
patent: 5152538 (1992-10-01), Mims
patent: 5462288 (1995-10-01), Hering et al.
patent: 5553870 (1996-09-01), Czekansky et al.
Brown & Wood LLP
DePumpo Daniel G.
Sabo Industria e Comercio, Ltda.
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