US 4,537,543 A · Security locking bolt

Abstract

A security locking bolt for flanging "Christmas tree" installations, valves and other equipment to a pipeline header or a pipeline, which includes a bolt body having a partially threaded bore and a security bolt head integrally provided on one end and a cooperating locking head secured to the opposite end of the bolt body by means of an internally-seated locking bolt which threadably cooperates with the internal threads in the bolt body. In a preferred embodiment a roller bearing is also provided in the bolt body bore and an end cap closes the locking bolt access opening in the locking head. In another preferred embodiment of the invention a grease fitting is threadably inserted in the security bolt head and longitudinal apertures are provided in the roller bearing and the locking bolt in order to provide a means for inserting grease into the threaded bore and removing the end cap situated in the locking head, by application of pressure. In another preferred embodiment of the invention a key set is provided in the security bolt head to provide limited access to the grease fitting.

Claims22

Dependent claims

A security locking bolt comprising a bolt body having an internal bore and bore threads provided in at least a portion of said bore;

a security bolt head provided on one end of said bolt body;
a locking head having a locking head body engaging the opposite end of said bolt body from said security bolt head;
a locking head cavity in said locking head, said locking head cavity extending through said locking head body and communicating with said bore;
a locking bolt removably recessed in said locking head cavity and extending into said bore in threadable cooperation with said bore threads;
a locking bolt aperture extending axially through said locking bolt;
and end cap tightly pressed into said locking head cavity and a grease fitting provided in said security bolt head and in communication with said internal bore, whereby grease inserted in said grease fitting and said internal bore causes removal of said end cap from said locking head;
and engaging means in cooperation with said locking bolt for receiving a tool and securing said locking head to said bolt body responsive to manipulation of the tool.

4 more elements

A security locking bolt for securing flanges comprising:

(a) a bolt body;
(b) a bore extending through said bolt body and bore threads provided in said bore;
(c) a security bolt head integrally provided in one end of said bolt body and having a cavity communicating with said bore;
(d) a grease fitting threadably inserted in said cavity;
(e) a locking head having a locking head body removably joining the end of said bolt body opposite said security bolt head and an aperture extending through said locking head and said locking head body and communicating with said bore;
(f) a locking bolt having a locking bolt head, a threaded locking bolt shank and an aperture extending axially through said locking bolt head and said locking bolt shank, said locking bolt extending into said aperture and said locking bolt shank provided in threadable engagement with said bore threads and said locking bolt head recessed in said aperture;
and
(g) an end cap tightly closing said aperture and sealing said locking bolt in said aperture and said bore, whereby removal of said locking head from said bolt body is prevented.

5 more elements

A security locking bolt for securing flanges comprising:

(a) a bolt body formed of stainless steel;
(b) a bore extending through said bolt body and bore threads provided in a portion of said bore;
(c) a security bolt head formed of stainless steel and integrally provided in one end of said bolt body and having a cavity communicating with said bore;
(d) a grease fitting threadably inserted in said cavity;
(e) a locking head formed of stainless steel and having a locking head body joining the end of said bolt body opposite said security bolt head and an aperture extending through said locking head and said locking head body and communicating with said bore;
(f) a locking bolt having a locking bolt head, a threaded locking bolt shank and an aperture extending axially through said locking bolt head and said locking bolt shank, said locking bolt extending into said aperture and said locking bolt shank provided in threadable engagement with said bore threads and said locking bolt head recessed in said aperture;
(g) an end cap formed of brass and tightly closing said aperture and sealing said locking bolt in said aperture and said bore, whereby removal of said locking head from said bolt body is prevented;
(h) engaging means in cooperation with said locking bolt head, whereby said locking bolt head can only be rotated with a tool designed to cooperate with said engaging means to selectively and threadably seat and unseat said locking bolt in said bore;
and
(i) a key set slot in said cavity and a key-operated key set means operable to selectively engage said key set slot responsive to manipulation of a key, whereby said key set means can be locked in said cavity to seal said grease fitting.

7 more elements

Dependencies are inferred from the claim text.

Security locking bolt

Life of this patent

Security locking bolt

Life of this patent

Abstract

Claims22