US1508372A - Dust cover - Google Patents

Description

epL 9 1924.

w. L. DAVIS DUST COVER Filed June 2a. 1923 Patented Sept. 9, 1924.

unites srares PA TENT orrice. I

WILLIAM L. DAVIS, OF PETERSBURG, VIRGINIA.

Do's'r covnn.

Application filed June 28, 1923. Serial No. 648,376.

and useful Improvements in Dust Covers;

and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the ac companying drawings, forming part of this specification.

This invention relates to accessory devices for use with automobile engines for shielding the working parts from dust and grime.

The object of the present invention is to provide a dust cover for an automobile bloc of the overhead valve type which may be secured in place and which will shield the valve from dust, dirt, sand, and grime.

A further object of the present invention is the provision of a metal dust cover which may be securedon the engine bloc by attachment to the exhaust port without other connection with the engine. A still further object is the provision of a dust cover in which provision is made for the oiling of the various joints.

Since automobile hoods are not at all tight fitting at the sides and are entirely open at the front a great amount of dust and dirt blows over the working parts of the engine and soon builds up. a deposit of appreciable size. This is unavoidable as it is absolutely essential that air be drawn in from the outside to cool the'motor. The present invention contemplates the provision of a metal casing covering the entire top of an engine bloc having overhead valves and covering the side of the bloc down to the lower chamber. The principal objection to a dust cap of this nature is that it is awkward to remove and unless some means is provided for oiling the several joints through the casing or canopy of the dust cover it is almost as easy to let the dust and dirt accumulate and to remove it from time to time as to be bothered with the constant removal of the cover.

The present invention contemplates the provision of a shutter in the top of the hood and movable a slight amount so as to uncover all of the oil holes when desired and at other times to close the hood entirely. There is no absolute necessity for closing the rear end of the dust cover since the draft is sufiiciently strong to prevent the accumulation of dust through the rear end, but

I rather prefer to close'the dust cover entirely since therear flange aids materially in stifiening the entire body of the dust cover. b I

' In the drawings,

Figure 1 is a perspective of my dustcover detached from the engine.

Fig. 2 is a vertical section through the engine with the cover in place showing particularly the method of attachment. 1

Fig. 3 is a top plan view." The invention is applicable for use with any one of the various better class engines practically all of which, use the overhead valves operated by rocker arms centrally pivoted on the engine bloc and the invention is shown in Fig. 2 in connection with such an engine. The cover includes a large vertical member 10 hereinafter called the side of the cover this being perforated as. at 11 to match the opening in the exhaust port and at'12 to'receive bolts which secure the exhaust manifold flangev to the exhaust port flange of the bloc; Near the bottom of the main member or side 10 there is a further small opening 15 to receive a rod which, in

the spark control mechanism.

The top'16 is rectangular and slightly the Chevrolet motor illustrated, ispart of greater in size than the engine bloc. This top member is preferably flat and hasa great number of oilholes such as 17 preferably three times the number of valves, that is, for a six cylinder engine there would be eighteen holes 17 one for oiling the central 1 post of each valve, one for the long rod, and one for the connection between the valve stem and the rocker arms so that any and all places requiring oiling may be readily reached without removal of the cover. In addition to the holes 17 I provide optional holes 18 in case it is desired to secure the dust cover to the engine bloc by removing one of the bolts from the rocker arm cap and by replacing such bolt with a stud 20 which should be of such length as to pass through the hole 18. When these studs are used a nut 21 should be provided to support the cover from beneath and the cover is then looked in place on the stud by means of a may not be integral with the; main; front member 29.1 and the rear member 30. The front member of the dust cover 29.. is. gener. ally in the form of a flange at right angles to the side 10 and conforms generally to the contour of the engine bloc having an. ex; tended portion 31 to fit the narrower portion of the engine casting.

As best seen in Fig. 1 the main rear flange 301 is of the same depth throughout and is a trifle shorter than the height of the side member 10. The member 30may if desired be entirely omitted but the form shown. is preferred in order to strengthen the device as a Whole and to enable the dust cover to be more snugly held against the engine.

The principle connection between. the dust cover" and the engine is obtained by the binding of the main portion or sidelOof: the dust cover between the exhaust port of the. engine and the exhaust manifold: and in general this will be the only connection of any kind between the engine and: the cover although, as previously stated, the holes 18 may be provided and used as previously described,

In order to prevent dust from seeping through the holes 17 I provide a shutter 36 composed of a plurality of connected slats or covers-37 operated as a unit by the handle 38 Working in a slot 39 in the top member 16 of the dust cover. Byshifting the handle 38 to one side the holes 17 are all uncovered and by moving the shutter to the other end of' the slot 39 all of the holes 17 are. simul taneously closed making the dust cover substantially grit tight.

hat I claim is:

1. The combination with an engine having overhead valves, of a cover enclosing said valves to shield same from dirt and grit and extending over the side of the engine bloc and secured thereto between the exhaust manifold, and; the exhaust port,

An automobile engine dust cover consisti g f a side Po i n. aving an Op nin therein corresponding in size and shape to the exhaust port and having a top member and front and back flanges forn'iing together a cover for the sides and top of the engine, said cover being secured on the engine bloc by the connections holding the exhaust manifold; to the exhaust port.

3. The combination With an engine having overhead: valves, a port in substantially the vertical center line of the bloc, and a pipe communicating with said opening and detachablysecured to the bloc, of a cover enclosing said valves to shield same from dirt and grit and extending over the side of the engine bloc and secured thereto between said pipe and said bloc,

4'. A; dust cover for an automobile engine consisting of a rectangular side, a rectangular top an l -shaped front and an L-shaped back, said cover being secured to the engine between the exhaust port and the exhaust manifold.

5. A dust cover for an automobile engine consisting of a rectangular side, a rectangular top, an L-shaped front and an L-shaped back, said cover being secured to the engine between a detachable pipe and the body of the engine bloc. said cover being held in place by the usual connections securing said pipe to said bloc.

6. A dust shield for an engine having overhead valves and side push rods consisting of means to shield the valves from dust and dirt, and a member having an opening therein to aline with the exhaust port opening, said member serving to protect the side rods from dust and dirt, and being secured to the engine bloc between the exhaust manifold and the exhaust port.

7. dust shield for the side push rods of an engine consisting of a member having an opening therein to aline with the exhaust port'opening, said member serving to protect the side rods from dust and dirt, and being secured to the engine bloc between the exhaust manifold and the exhaust port.

WILLIAM DAVIS.

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