Multi-piece bolts and methods of making the same
AssigneeCrushlock, Inc.
InventorsArnold R. Limatoc, Joel S. Peck, James P. Karins
Life of this patent
Estimating the term…
Abstract
A bolt includes a threaded shaft and a bolt head. The threaded shaft has a first end, a second opposing end, and an external thread. The first end includes a flared protrusion and the external thread is wrapped about the shaft and extends from the second opposing end to the flared protrusion. The bolt head includes an interior threaded bore for threadingly engaging the external thread of the threaded shaft, a front surface, and an opposing back surface having a recess configured to receive at least a portion of the flared protrusion of the threaded shaft therein.
Claims19
A method for making a bolt, the method comprising:
- providing a shaft having a first end and a second opposing end;
- forming a flared protrusion at the first end of the shaft;
- forming a thread on the shaft such that the thread extends from the second end to the flared protrusion;
- threadingly engaging a bolt head onto the thread of the shaft at the second opposing end of the shaft, the bolt head including (i) an interior threaded bore, (ii) a front surface, and (iii) an opposing back surface having a recess;
- rotating the bolt head relative to the shaft such that bolt head translates along the shaft towards the first end;
- continuing to rotate the bolt head until the flared protrusion formed in the shaft is received within the recess of the bolt head, thereby forming the bolt;
- and
- fixing the bolt head to the shaft such that the bolt head is prevented from rotating relative to the shaft,
- wherein at least a portion of the shaft including the thread extends beyond the bolt head after the forming the bolt.
A method of making a bolt, the method comprising:
- providing a shaft having a first end and a second opposing end;
- forming a flared protrusion at the first end of the threaded shaft;
- forming a thread on the shaft such that the thread extends from the second end to the flared protrusion;
- threadingly engaging a bolt head onto the thread of the shaft at the second opposing end of the shaft, the bolt head including a main body, a deformable body, and a relief space formed between a first recess of the main body and a flared end of the deformable body;
- rotating the bolt head relative to the shaft such that the bolt head translates along the shaft towards the first end;
- and
- continuing to rotate the bolt head until the flared protrusion formed in the shaft is received within a second recess formed in a back surface of the main body of the bolt head.
A method of securing a bolt to an object with a nut, the bolt comprising a threaded shaft and a bolt head having a main body and a deformable body, the method comprising:
- positioning the threaded shaft through an opening in the object such that a portion of the threaded shaft protrudes from the opening;
- threading the nut onto the portion of the threaded shaft protruding from the opening by rotating the nut in a first rotational direction, thereby causing the nut to move axially in a first direction towards a first surface of the object;
- causing a front surface of the nut to abut the first surface of the object and causing a front surface of the deformable body of the bolt head to abut a second opposing surface of the object by:
- (i) continuing to thread the nut onto the portion of the threaded shaft;
- (ii) rotating the bolt in a second opposing rotational direction, or
- (iii) a combination of (i) and (ii);
- with the front surface of the nut abutting the first surface of the object and with the front surface of the deformable body abutting the second opposing surface of the object:
- (a) applying a first rotational torque in the first rotational direction to the nut;
- (b) applying a second rotational torque in the second rotational direction to the bolt, or
- (c) a combination of (a) and (b);
- the application of the first rotational torque, the application of the second rotational torque, or the application of both the first and second rotational torques causing the deformable body to deform, thereby entering at least a portion of a relief space formed between the deformable body and the main body of the bolt head.
Dependencies are inferred from the claim text.