Safety breakaway electrical connector construction

A safety breakaway electrical connector construction for a tank truck or carrier vehicle, comprising in combination:

• (a) a housing having an opening in one wall,
• (b) an electrical receptacle having circuit means, said receptacle being mounted in said wall opening,
• (c) said circuit means comprising conductors which are disposed at the inside of said housing and other conductors which are accessible at the exterior of said housing,
• (d) attachment means carried by said receptacle at the exterior of said housing, for interlocking engagement with a cooperable electrical plug fitting of a liquid transfer facility to maintain said plug fitting in attached position on the receptacle,
• (e) said cooperable plug fitting having conductors adapted for engagement with the said other conductors of the receptacle,
• (f) electrical connector means disposed in said housing and engaged with said first-named conductors to provide circuit paths to and from the circuit means of the receptacle, and
• (g) cooperable yieldable detent means on said housing and receptacle, for normally yieldably retaining the receptacle positioned in said wall opening, said detent means yielding and releasing the receptacle from the housing in response to excessive abnormal force applied to said attachment means of the receptacle in a direction away from said housing,
• (h) said detent means comprising an annular external groove in the receptacle, and a snap ring disposed in said groove and adapted to spread apart and snap out of the groove in response to forceful lateral pressures exerted thereon,
• (i) said annular groove having an angled wall to facilitate the snapping out of said snap ring,
• (j) the angled wall of the groove making an angle of between 50.degree. and 70.degree. with respect to the axis of the receptacle.

A safety breakaway electrical connector construction for a tank truck carrier vehicle, comprising in combination:

• (a) a housing having an opening in one wall,
• (b) a first electrical receptacle having circuit means, said first receptacle being mounted in said wall opening,
• (c) said circuit means comprising a first set of inner conductors which are disposed at the inside of said housing and a first set of outer conductors which are accessible at the exterior of said housing,
• (d) first attachment means including a first keying device carried by said first receptacle at the exterior of said housing, for interlocking engagement with a first cooperable electrical plug fitting of a liquid transfer facility to orient said plug fitting and maintain it attached to the first receptacle,
• (e) said first cooperable plug fitting having conductors adapted for engagement with the said first set of outer conductors of the first receptacle,
• (f) electrical connector means disposed in said housing and engaged with said first set of inner conductors to provide circuit paths to and from the circuit means of the first receptacle, and
• (g) cooperable yieldable detent means on said housing and first receptacle, for normally yieldably retaining the first receptacle positioned in said wall opening, said detent means yielding and releasing the first receptacle from the housing in response to excessive abnormal force applied to said attachment means of the first receptacle in a direction away from said housing,
• (h) said housing having a second opening in one wall,
• (i) a second electrical receptacle having second circuit means, said second receptacle being mounted in said second wall opening,
• (j) said second circuit means comprising a second set of inner conductors which are disposed at the inside of said housing and a second set of outer conductors which are accessible at the exterior of said housing,
• (k) second attachment means including a second keying device to orient a second electrical plug fitting of the liquid transfer facility, said second attachment means being carried by said second receptacle at the exterior of said housing for interlocking engagement with said second cooperable electrical plug fitting, to maintain the plug fitting thereof attached to the second receptacle,
• (l) said second cooperable plug fitting having conductors adapted for engagement with the said second set of outer conductors of the second receptacle,
• (m) electrical connector means disposed in said housing and engaged with said second set of inner conductors to provide circuit paths to and from the circuit means of the second receptacle, and
• (n) cooperable yieldable detent means on said housing and second receptacle, for normally yieldably retaining the second receptacle positioned in said second wall opening, said detent means yielding and releasing the second receptacle from the housing in response to excessive abnormal force applied to said attachment means of the second receptacle in a direction away from said housing,
• (o) said first and second keying devices being dissimilar, thereby to prevent the said first electrical plug fitting from interlockingly engaging said second attachment means and vice-versa.