E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
33/121, 33/133,
E21B 43/01 (2006.01) E21B 33/035 (2006.01) E21B 33/038 (2006.01) E21B 41/00 (2006.01) F16L 1/26 (2006.01) F16L 37/00 (2006.01)
Patent
CA 1118200
APPARATUS AND METHOD FOR POSITIONING ONE PART RELATIVE TO ANOTHER PART ABSTRACT OF THE DISCLOSURE Disclosed is an aligning apparatus for positioning a first part with respect to a second part, which includes a lower cylindrical guide adapted to be affixed to the first part, the lower guide defining at its upper end a lower helical surface which includes half right hand and half left hand helical sur- faces. A corresponding upper cylindrical guide is adapted to be affixed to the second part, the upper guide defining at its lower end an upper helical surface substantially identical to the lower helical surface. The apparatus further includes a cylinder which is adapted to be affixed to the second part and a piston which is slidably mounted within the cylinder to be extendable and retractable by the selective application of fluid pressure to the cylinder. The piston is further adapted to engage the lower guide when extended and thereby axially align the upper and lower guides. After the guides have been axially aligned, the piston may be retracted, and the resulting contact between the upper and lower helical surfaces causes a rotational torque which rotationally aligns the first part relative to the second part. In another embodiment, the appa- ratus is adapted to connect the first part with the second part after positioning the parts. In the latter embodiment, the upper guide is affixed to and forms a part of the piston, and an axial alignment member is affixed to and projects from the lower guide. The axial alignment member is adapted to engage the upper guide and thereby axially align the upper and lower guides. Once the guides are thus axially aligned, the upper and lower helical surfaces are allowed to contact with the pis- ton extended. The contact between the helical surfaces causes the rotational alignment of the first part with the second part. The piston is then retracted, thereby causing respective mating elements of the first part and the second part to engage. The force of gravity is preferably used to bring the helical surfaces together and thereby cause a rotational torque to be applied to the first part relative to the second part. -2-
331983
Coffey Lacey C.
Lamb Raymond K.
Walker Stephen J.
Weathers Richard E.
Kirby Eades Gale Baker
Nl Industries Inc.
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