Safety-bleed-stop hose coupling

Claim 2

A fluid conduit coupling comprising a female member defining a receptacle and a male member having a tubular sidewall portion slidably received in the receptacle and engagable in sealing relation with the female member when inserted therein, said female member having a pair of inwardly directed, oppositely disposed segmental lugs at one end thereof, said segmental lugs being angularly spaced with respect to each other thereby defining a keyway, said tubular sidewall portion having a first pair of outwardly projecting, oppositely disposed segmental flanges for insertion into the keyway and to overlap and slidably engage behind said segmental lugs when said tubular sidewall portion is inserted into the receptacle and said members are rotated relative to each other, a second pair of outwardly projecting oppositely disposed segmental flanges axially spaced and angularly offset with respect to said first flange pair, said second pair of flanges being adapted for insertion into the keyway and to overlap and slidably engage behind said segmental lugs when said male member is inserted further into said receptacle and said members are rotated relative to each other, said female member having a bore communicating with the keyway defining a passage permitting unrestricted axial displacement of said male member and said segmental flanges between a position of sealing engagement and a safety stop position, and the tubular sidewall portion of said male member having a vent opening which is sealed by said female member when said tubular sidewall portion is fully inserted, and which is unsealed to permit fluid discharge into the passage as said tubular sidewall portion is withdrawn from the position of sealing engagement.

Claim 3

A safety-bleed-stop hose coupling assembly comprising, in combination: a tubular female member having an axially extending bore defining a fluid flow passage, an annular resilient sealing element lodged in said bore and circumscribing the fluid flow passage, a shank projecting from one end thereof for attachment to one end of a hose, and a pair of inwardly directed diametrically oppositely disposed segmental lugs formed on the opposite end of said female member partially blocking the flow passage and defining a restricted keyway opening; a tubular male member having an axially extending bore defining a fluid flow passage, a shank projecting from one end of said male member for attachement to one end of a hose, a coupling sleeve having a tubular sidewall portion projecting from the opposite end of said male member for insertion into said female member and into sealing engagement with said annular sealing element, said coupling sleeve having a vent opening extending radially through the sidewall portion defining a by-pass flow passage which is sealed by said annular sealing element when said sleeve is in the position of sealing engagement and which is uncovered when said sleeve is at least partially withdrawn from the position of sealing engagement, and said sleeve having a first pair of outwardly projecting, diametrically oppositely disposed segmental flanges which are adapted for insertion through the restricted keyway opening and to overlap and slidably engage behind said segmental lugs when said first pair of segmental flanges are inserted into said locking chamber and said members are rotated relative to each other, and a second pair of outwardly projecting, diametrically oppositely disposed segmental flanges which are adapted for insertion through the restricted keyway opening and to overlap and slidably engage behind said segmental lugs in a safety stop position when said second pair of segmental flanges are inserted through the restricted keyway opening and said members are rotated relative to each other, said second pair of segmental flanges being axially spaced and angularly offset with respect to the first flange pair; and, the axially extending bore having a counterbore communicating with the keyway opening and defining a passage permitting unrestricted axial displacement of the male member and segmental flanges between the position of sealing engagement and the safety stop position, wherein the vent opening is in communication with the second counterbore when the first pair of segmental flanges are in the safety stop position.

Claim 4

A safety-bleed-stop hose coupling assembly comprising, in combination: a tubular female member having an axially extending bore defining a fluid flow passage, an annular resilient sealing element lodged in said bore and circumscribing the fluid flow passage, a shank projecting from one end thereof for attachment to one end of a hose, and a pair of inwardly directed diametrically oppositely disposed segmental lugs formed on the opposite end of said female member partially blocking the flow passage and defining a restricted keyway opening; a tubular male member having an axially extending bore defining a fluid flow passage, a shank projecting from one end of said male member for attachement to one end of a hose, a coupling sleeve having a tubular sidewall portion projecting from the opposite end of said male member for insertion into said female member and into sealing engagement with said annular sealing element, said coupling sleeve having a vent opening extending radially through the sidewall portion defining a by-pass flow passage which is sealed by said annular sealing element when said sleeve is in the position of sealing engagement and which is uncovered when said sleeve is at least partially withdrawn from the position of sealing engagement, and said sleeve having a first pair of outwardly projecting, diametrically oppositely disposed segmental flanges which are adapted for insertion through the restricted keyway opening and to overlap and slidably engage behind said segmental lugs when said first pair of segmental flanges are inserted into said locking chamber and said members are rotated relative to each other, and a second pair of outwardly projecting, diametrically oppositely disposed segmental flanges which are adapted for insertion through the restricted keyway opening and to overlap and slidably engage behind said segmental lugs in a safety stop position when said second pair of segmental flanges are inserted through the restricted keyway opening and said members are rotated relative to each other, said second pair of segmental flanges being axially spaced and angularly offset with respect to the first flange pair; and, the axially extending bore having a counterbore communicating with the keyway opening and defining a passage permitting unrestricted axial displacement of the male member and segmental flanges between the position of sealing engagement and the safety stop position, wherein the vent opening is in communication with the second counterbore when the first pair of segmental flanges are in the safety stop position.