Back to results
US 4,223,799 AGranted
Releasable locking means for closure caps
AssigneeTime Saving Falls, Inc.
InventorsCharles G. Eyster, Holbrook C. Bissell
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeTime Saving Falls, Inc.
InventorsCharles G. Eyster, Holbrook C. Bissell
Estimating the term…
The present invention pertains to releasable locking mechanism for a hollow circular member such as a fill pipe for an oil tank and cup-shaped closure cap of non-magnetic material which is connectable to the hollow circular member, in combination with a locking member of ferrous material supported by said cap for axial movement vertically relative to the cap and hollow circular member but non-rotatable relative to the cap, one end of the locking member having a configuration that is engageable with the hollow circular member in non-rotatable relationship to prevent rotation of the cap with respect to the hollow circular member when the locking member is in the latter position, the locking member being adapted to be raised from said locking engagement with the hollow circular member by a magnet which may be mounted within a wrench for use with the cap to remove the same from the hollow circular member.
Releasable locking means for a hollow circular member open at one end and a cup-shaped closure cap of non-magnetic material complementary in shape to the exterior of said open end of said circular member and coengageable with each other by complementary coengageable securing means operable by rotation of said cap relative to said circular member, in combination with a locking member of ferrous material supported by said cap for axial movement relative thereto, means on said cap engaging said locking member to prevent rotation thereof relative to said cap but permit limited axial movement between operative and inoperative positions relative to said circular member when said cap is secured thereto, said circular member having a fixed locking configuration therein, and said locking member on said cap having securing means thereon movable therewith when moved axially and engageable with said fixed locking configuration in said circular member when said locking member is in said locking position relative to said cap, thereby to prevent rotation of said cap relative to said circular member, said locking member being movable into said operative position by gravity when said circular member is substantially vertical and said cap is secured thereto, and said locking member being movable vertically upward to said inoperative position upon application of a magnet to said cap and thereby move said securing means on said locking member axially toward said cap and disengage the same from said locking configuration in said circular member and thereby permit rotation of said cap relative to said circular member.
Releasable locking means for a hollow circular member open at one end and a cup-shaped closure cap of non-magnetic material complementary in shape to the exterior of said open end of said circular member and coengageable with each other by complementary coengageable securing means, in combination with a locking member of ferrous material supported by said cap for axial movement relative thereto and having axially-spaced geometric configurations thereon, and locking configurations on said cap and circular member respectively complementary to said spaced configurations on said locking member and extending axially a greater distance than that of the configurations on said locking member when said circular member and closure cap are connected in closed relationship, the complementary configurations on said cap and locking member being axially slidable a limited amount and also being non-rotatable relative to each other, and the complementary configurations on said circular member and locking member being movable into non-rotatable coengagement by gravity and thereby preventing rotation of said cap relative to said circular member, whereby application of a magnet to said cap serves to move said locking member axially toward said cap and disengage said locking member from said locking configuration in said circular member and thereby permit rotation of said cap relative to said circular member.
Dependencies are inferred from the claim text.