US3882593A — Method of inertia welding

Claim 1

Independent Claim 137 words

In a method of bonding two relatively rotatable workpieces, of the type wherein the workpieces are axially engaged at a common interface with sufficient force to permit friction bonding of the workpieces at their interface and wherein one of the workpieces is associated for rotation with a rotatable inertia mass and rotational energy is transferred from the rotatable mass to the one workpiece in sufficient quantity and at suitable rotational speed of the one workpiece relative to the other workpiece to effectively bond the axially engaged workpieces at their interface, the improvement comprising the sequence of applying the total axial load required to bond the workpieces prior to initiating any relative rotation between the workpieces and then driving the workpieces in relative rotation totally by the rotatable inertia mass to produce the transfer of the rotational energy.

Claim 2

Dependent Claim 137 words

In a method of bonding two relatively rotatable workpieces, of the type wherein the workpieces are axially engaged at a common interface with sufficient force to permit friction bonding of the workpieces at their interface and wherein one of the workpieces is associated for rotation with a rotatable inertia mass and rotational energy is transferred from the rotatable mass to the one workpiece in sufficient quantity and at suitable rotational speed of the one workpiece relative to the other workpiece to effectively bond the axially engaged workpieces at their interface, the improvement comprising the sequence of applying the total axial load required to bond the workpieces prior to initiating any relative rotation between the workpieces and then driving the workpieces in relative rotation totally by the rotatable inertia mass to produce the transfer of the rotational energy.

Claim 3

Dependent Claim 68 words

The invention of claim 1 further comprising the steps of developing excess inertial energy in the rotatable inertia mass relative to the bonding requirements for the two workpieces and dissociating the one workpiece from rotation with the rotatable inertia mass following said transferring of rotational energy from the rotatable inertia mass to the one work piece with the excess of inertial energy remaining in the rotatable inertia mass.

Claim 4

Dependent Claim 26 words

The invention of claim 1 wherein the step of a associating the rotatable inertia mass with the one workpiece is accomplished by coupling means arranged therebetween.

Claim 5

Dependent Claim 30 words

The invention of claim 1 wherein the rotatable inertia mass is first accelerated to a preselected speed by suitable motor means and then coupled for rotatioN with the one workpiece.

Claim 6

Dependent Claim 50 words

The invention of claim 4 wherein the preselected speed produces excess inertial energy in the rotatable inertia mass relative to the bonding requirements for the two workpieces and the rotatable inertia mass is uncoupled from the one workpiece with the excess of inertial energy remaining in the rotatable inertia mass.

Claim 7

Dependent Claim 49 words

The invention of claim 4 wherein the rotatable inertia mass is coupled to the motor means for acceleration of the rotatable inertia mass to the preselected speed and then uncoupled from the motor means generally at the same time that rotatable inertia mass is coupled with the one workpiece.

Claim 8

Dependent Claim 82 words

In a method of bonding two workpieces, the steps comprising: securing the two workpieces in axially aligned, relatively rotatable relation, axially urging the workpieces into engagement at a common interface under the total pressure required to bond the workpieces at said common interface, connecting one of the workpieces for rotation, with a rotating inertial mass, and disconnecting the one workpiece and rotating inertia mass upon delivery of sufficient rotational energy to the relatively rotatable workpieces to bond them together at their interface.

Claim 9

Dependent Claim 82 words

In a method of bonding two workpieces, the steps comprising: securing the two workpieces in axially aligned, relatively rotatable relation, axially urging the workpieces into engagement at a common interface under the total pressure required to bond the workpieces at said common interface, connecting one of the workpieces for rotation, with a rotating inertial mass, and disconnecting the one workpiece and rotating inertia mass upon delivery of sufficient rotational energy to the relatively rotatable workpieces to bond them together at their interface.

Claim 10

Dependent Claim 76 words

The method of claim 7 further comprising the steps of accelerating the rotatable inertia mass by motor means to a preselected speed producing excess inertial energy in the rotatable inertia mass relative to the bonding requirements for the two workpieces prior to connection of the one workpiece for rotation with the rotatable inertia mass and disconnecting the one workpiece from the rotating inertia mass with the excess of inertial energy remaining in the rotatable inertia mass.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1978-05-12	1978-11-11	1979-05-13	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1982-05-12	1982-11-11	1983-05-13	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1986-05-12	1986-11-11	1987-05-13	$7700.00	Window Closed / Lapsed

Method of inertia welding

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