Safety closure cap

Claim 2

A safety closure cap for bayonet connection with a filler spout of an automobile tank or the like, wherein the cap has a spring pressed sealing disc secured to its underside for sealing against the top of the spout, and wherein the spout has opposite notches only adjacent said top through which opposite latching lugs on said cap are insertable and upon turning of the cap it becomes latched over the top of the spout as the lugs ride over opposite cam surfaces on the spout which are located only adjacent the top thereof, the cap and the spout having an initial fit sufficiently loose whereby latching can be inadvertently effected by only one of the lugs with the cap tilted and the opposite lug engaging the top of the spout, said cap having means thereon to preclude said latching by only one lug, comprising opposite elongated blocking prongs extending downwardly from the respective latching lugs and which are engageable with either of the notches to prevent turning of the cap unless the cap is fully seated on the top of the spout.

Claim 3

The safety closure cap of claim 1 wherein each blocking prong is of sufficient length to prevent turning of the cap when only one latching lug is fully inserted through a notch.

Claim 4

The safety closure cap of claim 1 wherein each blocking prong is substantially perpendicular to the top of the cap.

Claim 5

The safety closure cap of claim 3 wherein each blocking prong is wider at the top than the depth of each of the notches.

Claim 6

The safety closure cap of claim 8 wherein the cap has a downwardly extending cylindrical flange and the blocking prongs are spaced inwardly of said flange to cooperate with internal notches of said spout.

Claim 7

A safety closure cap for bayonet connection with a spout wherein said spout has a top and opposite notches through which opposite latching lugs on said cap are insertable and upon turning of the cap it becomes latched over the top of the spout as the lugs ride over opposite cam surfaces on the spout; said cap having means thereon to preclude latching by only one of the lugs with the cap tilted and the opposite lug engaging the top of the spout, comprising opposite elongated latching lugs, blocking prongs extending downwardly from the respective cap latching lugs, and which are engageable with edges of the notches to prevent turning of the cap unless the cap is fully seated on the top of the spout, said cap also having a downwardly extending cylindrical flange with which the blocking prongs are connected to cooperate with external notches of said spout.

Claim 8

A safety closure cap for bayonet connection with a spout wherein said spout has a top and opposite notches through which opposite latching lugs on said cap are insertable and upon turning of the cap it becomes latched over the top of the spout as the lugs ride over opposite cam surfaces on the spout; said cap having means thereon to preclude latching by only one of the lugs with the cap tilted and the opposite lug engaging the top of the spout, comprising opposite elongated latching lugs, blocking prongs extending downwardly from the respective cap latching lugs, and which are engageable with edges of the notches to prevent turning of the cap unless the cap is fully seated on the top of the spout, said cap also having a downwardly extending cylindrical flange with which the blocking prongs are connected to cooperate with external notches of said spout.

Claim 9

A safety closure cap for bayonet connection with a spout comprising a top, a spring pressed sealing disc secured to the underside of the top for sealing against the top of the spout, opposite latching lugs located only at substantially the same level on the cap for bayonet connection upon turning of the cap on the spout with opposite bayonet notches of the spout located only adjacent the top of the spout, the lugs being sufficiently small relative to the bayonet notches to form a sufficiently loose fit of the cap on the spout whereby latching can be inadvertently effected by only one of the lugs with the cap tilted and the opposite lug engaging the top of the spout, and an elongated blocking prong extending downwardly from and rigid with each latching lug to insure that the cap is fully seated on the top of the spout before it can be turned to latch said cap into the spout.

Claim 10

A safety closure cap for bayonet connection with a spout comprising a top, a spring pressed sealing disc secured to the underside of the top for sealing against the top of the spout, opposite latching lugs located only at substantially the same level on the cap for bayonet connection upon turning of the cap on the spout with opposite bayonet notches of the spout located only adjacent the top of the spout, the lugs being sufficiently small relative to the bayonet notches to form a sufficiently loose fit of the cap on the spout whereby latching can be inadvertently effected by only one of the lugs with the cap tilted and the opposite lug engaging the top of the spout, and an elongated blocking prong extending downwardly from and rigid with each latching lug to insure that the cap is fully seated on the top of the spout before it can be turned to latch said cap into the spout.

Claim 11

A safety closure cap for bayonet latching with the filler spout of an automobile tank or the like comprising a top, a cylindrical flange extending downwardly from the top of the spout, a spring pressed sealing disc secured to the underside of the cap top located within said flange for sealing against the top of the spout when the cap is turned to close the same, only one pair of opposite latching lugs located at substantially the same level adjacent said top of the cap for insertion through opposite bayonet notches located at substantially the same level adjacent the top of said spout, said latching lugs being sufficiently small relative to the bayonet notches to form a sufficiently loose fit of the cap on the spout whereby latching of the cap onto the spout can be inadvertently effected by only one of the lugs with the cap tilted and the opposite lug engaging the top of the spout, and opposite elongated blocking prongs spaced inwardly of said cylindrical flange extending downwardly from the respective cap latching lugs and which are engageable with edges of the notches to prevent turning of the cap unless the cap is fully seated on the top of the spout.

Claim 12

A safety closure cap for bayonet latching with the filler spout of an automobile tank or the like comprising a top, a cylindrical flange extending downwardly from the top of the spout, a spring pressed sealing disc secured to the underside of the cap top located within said flange for sealing against the top of the spout when the cap is turned to close the same, only one pair of opposite latching lugs located at substantially the same level adjacent said top of the cap for insertion through opposite bayonet notches located at substantially the same level adjacent the top of said spout, said latching lugs being sufficiently small relative to the bayonet notches to form a sufficiently loose fit of the cap on the spout whereby latching of the cap onto the spout can be inadvertently effected by only one of the lugs with the cap tilted and the opposite lug engaging the top of the spout, and opposite elongated blocking prongs spaced inwardly of said cylindrical flange extending downwardly from the respective cap latching lugs and which are engageable with edges of the notches to prevent turning of the cap unless the cap is fully seated on the top of the spout.