Closure fasteners – Bolts – Multiple
Patent
1984-02-13
1986-03-11
Moore, Richard E.
Closure fasteners
Bolts
Multiple
220316, 220DIG33, 292144, E05C 906
Patent
active
045751366
ABSTRACT:
A gas pressure actuated latch for a fuel tank cap or other container tank cap is disclosed. The cap body has formed therein a cylinder in communication with an air inlet passageway connected to an external air hose fitting for movement of a latch piston contained within the cylinder in response to the application of pressurized air. The piston is provided with a plurality of opening cam fingers which are urged against a corresponding number of slide latches to move such latches horizontally inward to open the latch when air is applied to the cylinder. This causes such latch members to slide inwardly away from beneath the lip of the fuel tank filler opening into an unlocked position in response to vertical movement of the piston. In addition, a closing cam member is resiliently biased by a coil spring upward against the piston so that its cam surfaces also engage the latch members to normally close the latch by sliding such latch members outward into a locked position beneath the lip of the fuel tank filler opening. The coil spring, closing cam member and the latch members are enclosed and held by a cup-shaped cage member attached to the cap body by fastening screws. When the force of the air pressure within the cylinder exceeds the force of the spring, the piston moves downward from the latch closed position and causes the opening cam surfaces thereon to open the latch so that the cap can be removed. This has the advantages of greater security and convenience in that the cap can be unlocked from a remote position, such as within a truck cab, but cannot be removed until it is so unlocked.
REFERENCES:
patent: 1560489 (1925-11-01), Yager
patent: 1830949 (1931-11-01), Lake
patent: 2007100 (1935-07-01), Varese
patent: 2530628 (1950-11-01), Pivero
patent: 3338455 (1967-08-01), Miller
patent: 3449860 (1969-06-01), Franks, Jr. et al.
patent: 3893723 (1975-07-01), Boule
patent: 4294376 (1981-10-01), Keller
patent: 4440308 (1984-04-01), Baker
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