Abstract An air stream oil injecting device includes a base portion having a bore through which air is adapted to flow, a depending oil reservoir secured to the base portion, and an inverted bellshaped dropping window, sealingly secured to the base portion, and containing an oil dropping pipe, the interior of the dropping window communicating with the air flow passage through a small hole. The air dropping pipe is in communication with an oil feed pipe in the reservoir. A T-shaped damper, of resilient material, such as rubber or the like, includes a main damper portion normally extending across the air flow passage and having substantially the shape of the latter, this damper portion being integral with a leg portion which closes, from beneath, a relatively large opening in the lower wall of the air flow passage, the leg portion being retained in position by a threaded plug of rubber or the like. This threaded plug contains a spring biased check valve including a ball engaged by the leg portion of the damper, and a branch passage connects an upstream passage of the air flow passage to a space beneath the leg portion of the damper for leakage of air around the ball check valve into the reservoir. The opening in the lower wall of the air passage forms a recess or groove into which the tongue portion of the damper can be deflected by air under pressure, flowing through the air flow passage, to provide a substantially uninterrupted air flow through the air flow passage.
An air stream oil injecting device comprising, in combination, a base portion having a bore through which air is adapted to flow; means, including an oil reservoir secured to said base portion, operable to drop oil into an air stream flowing through said bore; an aperture formed in the lower wall of said bore and bounded by a downwardly facing shoulder, said aperture defining a recess in the bore surface; a substantially T-shape damper of elastic material, including a leg portion seated against said shoulder and closing said aperture to cooperate therewith to define said recess, and a tongue portion intEgral with said leg portion and extending therefrom through said aperture into said bore; said tongue portion having substantially the cross-sectional shape of said bore at said aperture; retaining means retaining said leg portion seated against said shoulder; said tongue portion, responsive to increasing flow of air through said bore, bending downwardly toward said leg portion and, with maximum flow of air through said bore, folding down into said recess to leave said bore substantially unobstructed; said tongue portion, responsive to decreased air flow through said bore, returning toward its upright position in accordance with the decrease in the air flow through said bore; said retaining means comprising a threaded plug threaded into a downwardly facing internally threaded boss projecting from said base portion, said plug engaging said leg portion and defining therewith a small volume chamber; a branch passage communicating with said small volume chamber and with said bore upstream of said tongue portion of said damper; and check valve means in said plug controlling communication between said branch passage and the interior of said oil reservoir.
Claim 2
Dependent Claim
278 words
An air stream oil injecting device comprising, in combination, a base portion having a bore through which air is adapted to flow; means, including an oil reservoir secured to said base portion, operable to drop oil into an air stream flowing through said bore; an aperture formed in the lower wall of said bore and bounded by a downwardly facing shoulder, said aperture defining a recess in the bore surface; a substantially T-shape damper of elastic material, including a leg portion seated against said shoulder and closing said aperture to cooperate therewith to define said recess, and a tongue portion intEgral with said leg portion and extending therefrom through said aperture into said bore; said tongue portion having substantially the cross-sectional shape of said bore at said aperture; retaining means retaining said leg portion seated against said shoulder; said tongue portion, responsive to increasing flow of air through said bore, bending downwardly toward said leg portion and, with maximum flow of air through said bore, folding down into said recess to leave said bore substantially unobstructed; said tongue portion, responsive to decreased air flow through said bore, returning toward its upright position in accordance with the decrease in the air flow through said bore; said retaining means comprising a threaded plug threaded into a downwardly facing internally threaded boss projecting from said base portion, said plug engaging said leg portion and defining therewith a small volume chamber; a branch passage communicating with said small volume chamber and with said bore upstream of said tongue portion of said damper; and check valve means in said plug controlling communication between said branch passage and the interior of said oil reservoir.
Claim 3
Dependent Claim
55 words
An air stream oil injection device, as claimed in claim 1, in which said check valve means comprises a spring biased ball valve in said small volume chamber and controlling communication between said small volume chamber and a passage communicating with said oil reservoir; said ball being engaged with said leg portion of said damper.