Patent ID: 8800966
Filing Date: 2014-08-12
Classification: F01M,Y10T

Abstract:
1. A drain plug for selectively draining a source of fluid, comprising: a first portion having a main body which releasably mates with a reservoir enclosing a source of fluid to be drained, and which defines a first fluid passageway, and an annular shaped passageway, and wherein the main body of the first portion has a first end which screw threadably mates with the reservoir, and an opposite, second end, and wherein the first fluid passageway extends between the first and second ends thereof, and wherein the first fluid passageway which is defined by the first portion of the drain plug has a first section, having a predetermined diametral dimension, and a second section having a predetermined diametral dimension greater than the first section, and wherein the first section of the first fluid passageway has a screw threaded region formed therein, and wherein a spring seat is defined between the first and second sections of the first fluid passageway, and wherein the main body of the first portion of the drain plug has a guidance pin passageway formed in the second end of the main body thereof, and wherein the guidance pin passageway has a first, and an opposite second end; a second portion which telescopes at least partially within the annular shaped passageway defined by the main body of the first portion, and which further defines a second fluid passageway which is coaxially aligned with the first fluid passageway; and wherein the second portion is slideably moveable from a first position which inhibits the source of fluid from passing out through the coaxially aligned first, and second fluid passageways, and a second position, where the second portion permits the source of fluid to pass through the coaxially aligned first, and second fluid passageways; and a third portion which is telescopingly received within the second fluid passageway, and which is releasably affixed to the first portion, and wherein the third portion defines, at least in part the annular shaped passageway of the first portion, and wherein the third portion defines a third fluid passageway which is coaxially aligned with the first and second fluid passageways, and wherein the second portion is slideably moveable from the first position which inhibits the source of fluid from passing out through the coaxially aligned first, second and third passageways, and the second position, where the second portion permits the source of fluid to pass through the coaxially aligned first, second, and third fluid passageways, and wherein a coil spring is received within the first fluid passageway, and which is further positioned between the first end of the second portion of the drain plug, and is located in resting receipt on the spring seat, and wherein the coil spring biasingly urges the second portion of the drain plug in the direction of the first position, and wherein the first end of the second portion is telescopingly received, at least in part, within the coil spring.