SCREW CAP WITH LOCK

• US 3,750,434 A
• Filed: 05/25/1971
• Issued: 08/07/1973
• Est. Priority Date: 05/25/1970
• Status: Expired due to Term

• Current Assignee: Theo Gerdes
• Original Assignee: Theo Gerdes
• Inventors: Gerdes, Theo
• Primary Examiner(s): McGlynn, Joseph H.
• Application Number:
  US05/146,668
• Time in Patent Office: 805 Days
• Field of Search: 70/166-172,221-223 215/9,98
• US Class Current: 70/172
• CPC Class Codes: B60K 15/0409 Provided with a lock
• CPC Class Codes: Y10T 70/5602 Dead bolt
• CPC Class Codes: Y10T 70/5819 Handle-carried key lock

Abstract

An arrangement of locking bolts for engaging in screw thread or pipe socket parts of cylinder or mortise locks in closure caps and having a removable key, wherein the socket is provided with an inside thread which is partly interrupted, with which a locking bolt engages laterally to secure the cap when the key is turned.

Claims

1. In an arrangement of the character described, a combination comprising a tube having an open end and being provided in the region of said open end at the inner surface thereof with an interrupted screw thread defining between portions thereof a plurality of gaps;

cap means provided on parts of its outer surface thereof with a screw thread for threading engagement with that on the inner surface of said tube, said cap means being provided with a lateral guide slot;

a laterally displaceable substantially rigid locking member in said cap means and having a locking portion guided in said guide slot, said member being movable in its entirety relative to said cap means between a locking position in which said locking portion projects beyond the screw thread on said cap means for locking engagement in one of said gaps when said cap means is threadingly engaged in said tube, and an inwardly withdrawn inactive position; and

means for moving said locking member between said positions thereof and comprising a lock cylinder rotatably mounted in said cap means, a key engageable with said locking cylinder for rotating the latter, and single means for coupling said lock cylinder with said locking member for positively moving said member between said locking and said inactive position thereof during rotation of said cylinder.

2. A combination as defined in claim 1, and including an additional locking member displaced in circumferential and axial direction of said locking cylinder with respect to said one locking member, said coupling means cooperating with both of said locking members.

3. A combination as defined in claim 1, and including sealing means between said lock cylinder and said cap means.

4. In an arrangement of the character described, a combination comprising a tube having an open end and being provided in the region of said open end at the inner surface thereof with an interrupted screw thread defining between portions of said thread a plurality of gaps;

cap means provided on its outer surface thereof with a screw thread for threading engagement with that on the inner surface of said tube, said cap means being provided with a lateral guide slot;

a laterally displaceable locking member in said cap means and having a locking portion guided in said guide slot, said member being movable between a locking position in which said locking portion projects beyond the screw thread on said cap means for locking engagement in one of said gaps when said cap means is threadingly engaged in said tube, and an inwardly withdrawn inactive position; and

means for moving said locking member between said positions thereof and comprising a lock cylinder rotatably mounted in said cup means, a key engageable with said lock cylinder for rotating the latter, and means coupling said lock cylinder with said locking member for moving said member between said locking and said inactive position thereof during rotation of said cylinder, said coupling means comprising a slot in said locking member extending inclined to the direction of movement thereof and an eccentric pin on said locking cylinder engaged in said inclined slot.

5. In an arrangement of the character described, a combination comprising a tube having an open end and being provided in the region of said open end at the inner surface thereof with an interrupted screw thread defining between portions of said thread a plurality of gaps;

cap means comprising an upper part and a lower part provided at the outer surface thereof with a screw thread for threading engagement with that on the inner surface of thE tube and with a lateral guide slot, said upper and said lower parts being connected for rotation with respect to each other, and including means in said cap means and cooperating with said parts for connecting said lower part for turning with said upper part when the latter is turned in a direction screwing said cap means into said threaded tube and for releasing said upper part for turning relative to said lower part when a predetermined turning moment during screwing said cap means into said tube is reached;

a laterally displaceable locking member in said cap means and having a locking portion guided in said guide slot, said member being movable between a locking position in which said locking portion projects beyond the screw on said cap means for locking engagement in one of said gaps when said cap means is threadingly engaged in said tube, and an inwardly withdrawn inactive position; and

means for moving said locking member between said positions thereof and comprising a lock cylinder rotatably mounted in said cap means, a key engageable with said locking cylinder for engaging the latter, and means coupling said lock cylinder with said locking member for positively moving said member between said locking and said inactive position thereof during rotation of said cylinder.

6. A combination as defined in claim 5, including an annular outwardly projecting flange on said lock cylinder, and a sealing ring below said flange and pressed into a groove of said lower cap part.

7. A combination as defined in claim 5, wherein said upper part is formed with an outwardly projecting hollow hand-grip portion having a pair of lower edges, and wherein said means for connecting and releasing said lower parts comprises a bridge member arranged in said lower part movable in axial direction thereof and non-rotatably connected to said lower parts, said bridge member having a pair of lugs having each at one side thereof an inclined cam face for engagement with the respective lower edge of said upwardly projecting hand-grip portion and on the other side a face extending in axial direction of said lock cylinder, and compression spring means for biasing said bridge member in a direction in which said lugs are yieldably held in said hand-grip portion.

8. A combination as defined in claim 7, and including a sealing disc in said lower cap part, said compression spring engaging said sealing disc and pressing the latter with a sealing action against said lock cylinder.