Air breather plug assembly for use in power transmission unit
First Claim
1. An air breather plug assembly adapted for use in a casing of a power transmission unit, comprising:
- a cylindrical plug body detachably threaded into upper portion of said casing and having an inner end portion which extends into an interior of said casing by a predetermined length;
a cup-shaped baffle-plate fixedly coupled within the inner end portion of said plug body, said baffle-plate having a head portion formed with a slot for permitting the flow of air passing therethrough and being positioned in an interior of said plug body;
a cup-shaped seal member of elastic material fixedly coupled within an outer end portion of said plug body and having a head portion positioned within the outer end portion of said plug body and being spaced from the head portion of said baffle-plate by a predetermined distance to form a cavity therebetween, the head portion of said seal member being formed with a slit to be opened by an internal pressure applied thereto from the interior of said casing through said baffle-plate; and
a cap fixedly coupled over the outer end portion of said plug body and being engaged with the head portion of said seal member in such a manner as to allow the air to flow from said cavity to the exterior through the slit of said seal member.
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Accused Products
Abstract
An air breather plug assembly adapted for use in a transmission or trans-axle casing includes a cylindrical plug body detachably threaded into an upper portion of the casing and having an inner end portion which extends into an interior of the casing in a predetermined length, a cup-shaped baffle-plate fixedly coupled within the inner end portion of the plug body and being formed with a slot for permitting the flow of air passing therethrough, a cup-shaped seal member of elastic material fixedly coupled within an outer end portion of the plug body and spaced from the baffle-plate in a predetermined distance, the seal member being formed with a slit to be opened by an internal pressure applied thereto from the interior of the casing through the baffle-plate, and a cap fixedly coupled over the outer end portion of the plug body in such a manner as to allow the air flowing from the interior of the plug body to the exterior through the slit of the seal member.
90 Citations
4 Claims
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1. An air breather plug assembly adapted for use in a casing of a power transmission unit, comprising:
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a cylindrical plug body detachably threaded into upper portion of said casing and having an inner end portion which extends into an interior of said casing by a predetermined length; a cup-shaped baffle-plate fixedly coupled within the inner end portion of said plug body, said baffle-plate having a head portion formed with a slot for permitting the flow of air passing therethrough and being positioned in an interior of said plug body; a cup-shaped seal member of elastic material fixedly coupled within an outer end portion of said plug body and having a head portion positioned within the outer end portion of said plug body and being spaced from the head portion of said baffle-plate by a predetermined distance to form a cavity therebetween, the head portion of said seal member being formed with a slit to be opened by an internal pressure applied thereto from the interior of said casing through said baffle-plate; and a cap fixedly coupled over the outer end portion of said plug body and being engaged with the head portion of said seal member in such a manner as to allow the air to flow from said cavity to the exterior through the slit of said seal member. - View Dependent Claims (2, 3)
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4. An air breather plug assembly adapted for use in a casing of power transmission unit, comprising:
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a cylindrical plug body detachably threaded into an upper portion of said casing and having an inner end portion which extends into an interior of said casing by a predetermined length; a cylindrical member fixedly coupled within an outer end portion of said plug body; a cup-shaped baffle-plate fixedly coupled within the inner end portion of said plug body, said baffle-plate having a head portion formed with a slot for permitting the flow of air passing therethrough and being positioned in an interior of said plug body; a cup-shaped seal member of elastic material fixedly coupled within an outer end portion of said cylindrical member and having a head portion positioned within the outer end portion of said cylindrical member and being spaced from the head portion of said baffle-plate by a predetermined distance to form a cavity therebetween, the head portion of said seal member being formed with a slit to be opened by an internal pressure applied thereto from the interior of said casing through said baffle-plate; and a cap fixedly coupled over the outer end portion of said cylindrical member and being engaged with the head portion of said seal member in such a manner as to allow the air to flow from said cavity to the exterior through the slit of said seal member.
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Specification