Power plants – Internal combustion engine with treatment or handling of... – By sorber or mechanical separator
Patent
1986-08-14
1987-11-17
Hart, Douglas
Power plants
Internal combustion engine with treatment or handling of...
By sorber or mechanical separator
55485, 55DIG30, 60295, 285322, F01N 302
Patent
active
047064552
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a filtering device intended to be attached temporarily to an exhaust pipe of a vehicle at occasional indoor driving and the like and comprising a filter, a filter holder and a connection member for attachment to the exhaust pipe.
At occasional driving of the vehicle with internal combustion engines in factories, garages, work-shops, at loading and unloading on ships or car ferries or the like the discharge of exhaust makes a great unhealthy and sanitary problem. Through the U.S. Pat. No. 3,596,441 it is known to connect a tube-shaped filter to the exhaust pipe of the vehicle, the first object of which is to absorb condensate and soot particles from the exhaust system when the vehicle have stood still for some time. For longer idle driving or even displacing of the vehicle with its own engine this filter is not suitable.
There is also known an exhaust filter in the form of a relatively large box, which is attached to some constructional part of the rear part of the vehicle, for example the bumper and which via a flexible tube can be connected with the end of the exhaust pipe of the vehicle. The box contains a filter which reduces the hydrocarbones, nitrous oxides, sulphur oxides, carboxide and aldehydes and separates soot and lead particles, which are larger than 0.1 .mu.m. The box is further provided with air guides, connection members in the form of hooks with mechanical locking devices or strong magnets and the flexible tube is provided with a rubber funnel intended to be threaded on the exhaust pipe of the vehicle. The rubber funnel is held in a position by means of rubber loops which are hooked in the vehicle. This exhaust filter box by itself is effective, and can be attached to different dimensions of exhaust pipes, and withstands a multiply of starts and short drivings, but it is expensive and because of its size and weight it is a complication, which requires a relatively circumstantial mounting and dismounting.
THE OBJECT AND MOST IMPORTANT FEATURES OF THE INVENTION
The object of the present invention is to provide an exhuast filter which is simple to mount and dismount, which is self-supporting, i.e. does not require to be fixed to a part of the vehicle except the exhaust pipe, which can be manufactured so cheap that the whole device can be used as a disposable article, which gives possibility of choice regarding the connection to different dimensions of exhaust pipes and which in spite of its low weight and compression performance fulfils the demands on separation of particles and reduction of harmful gases caused by a prescribed number of startings and drivings. These objects have been solved by the fact that the filter holder consists of a double-sided open sleeve, both ends of which are designed with coupling means, for example in form of a bayonet couplings, for connection of a perforated cover attachable at one end of the sleeve and provided with corresponding coupling means, said cover being intended for inclusion of said filter which is locatable against a seat in the sleeve, and that to the other end of the sleeve there are connectible alternative connection members for attachment to exhaust pipes with different diameters, and which connection member is arranged in the axial extension of the sleeve and designed to support the holder.
DESCRIPTION OF THE DRAWINGS
FIG. 1 shows an exhaust filter according to the invention partly in front view and partly in section,
FIG. 2 shows the front end view of the exhaust filter according to FIG. 1,
FIG. 3 shows the rear end view of the exhaust pipe according to FIG. 1,
FIG. 4 shows a section through the cover of the exhaust filter,
FIG. 5 shows the filter holder of the exhaust filter in side view and partly in section,
FIGS. 6 and 7 illustrate a perspective view of an alternative connection member from the front and back.
DESCRIPTION OF THE EMBODIMENTS
The exhaust filter according to the invention mainly consists of four parts, a filter holder 11, a cover 12 connectible to its one front end, a connection membe
REFERENCES:
patent: 2524588 (1950-10-01), Bechtel
patent: 2620893 (1952-12-01), Holt
patent: 3406501 (1968-10-01), Watkins
patent: 3476412 (1969-11-01), Demler
patent: 3675398 (1972-07-01), Giarrizzo
patent: 4328979 (1982-05-01), Stoll
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