US4893044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotor balancing
Assignee: Copeland LP
•
Filing: 1987-11-20
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Granted: 1990-01-09
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Expires: 2007-11-20
Abstract
Abstract An improved arrangement for securing a counterweight to a rotor of an electric motor is disclosed wherein the counterweight includes a body portion disposed entirely on one side of a diametrical plane extending along the axis of rotation of the rotor and flange portions for securing said counterweight to the rotor are disposed on the other side of this plane.
Inventors
- 👤 James W. Bush
- 👤 Gary J. Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:17
CPC Classifications
H; H02; H02K; H02K7/00; H02K7/04; F; F04; F04C; F04C29/00; F04C29/0021; F16; F16F; F16F15/00; F16F15/28; F16F15/32; F16F15/322
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
151 words
A counterweight for a rotor of a dynamoelectric motor comprising: a main body portion of substantial mass, said main body portion being generally of a shape so as to extend generally circumferentially along an end face of a rotor through an arc of up to but not exceeding 180° f said end face; and mounting means extending outwardly from opposite ends of said main body portion so as to extend generally circumferentially along said end face of said rotor, said mounting means and said main body being of a length so as to extend in excess of 180° around said circumference of said rotor when assembled thereto; said main body portion of said counterweight being stepped and including a C-shaped inner section sized to fit within a bore provided in said end surface of said rotor and a C-shaped outer section extending axially outwardly from said end surface of said rotor.
Claim 2
Dependent Claim
151 words
A counterweight for a rotor of a dynamoelectric motor comprising: a main body portion of substantial mass, said main body portion being generally of a shape so as to extend generally circumferentially along an end face of a rotor through an arc of up to but not exceeding 180° f said end face; and mounting means extending outwardly from opposite ends of said main body portion so as to extend generally circumferentially along said end face of said rotor, said mounting means and said main body being of a length so as to extend in excess of 180° around said circumference of said rotor when assembled thereto; said main body portion of said counterweight being stepped and including a C-shaped inner section sized to fit within a bore provided in said end surface of said rotor and a C-shaped outer section extending axially outwardly from said end surface of said rotor.
Claim 3
Dependent Claim
48 words
A counterweight as recited in claim 1 wherein said mounting means comprises a pair of apertured mounting flanges each flange extending circumferentially from said main body portion, each of said apertures being adapted to receive fastening means for securing said counterweight to the end surface of said rotor.
Claim 4
Dependent Claim
103 words
A rotor for use in a rotary machine having a rotatable shaft to which the rotor is attached, the rotor having opposite ends with a plane incorporating the rotor axis dividing the rotor into two imaginary halves, comprising, a counterweight secured to one end of said rotor and including a body having a pair of mounting flanges, said body being disposed entirely on one side of said plane, said flanges extending to the other side of said plane, and means securing said flanges to said one end of said rotor, said securing means being positioned entirely on said other side of said plane.
Claim 5
Dependent Claim
103 words
A rotor for use in a rotary machine having a rotatable shaft to which the rotor is attached, the rotor having opposite ends with a plane incorporating the rotor axis dividing the rotor into two imaginary halves, comprising, a counterweight secured to one end of said rotor and including a body having a pair of mounting flanges, said body being disposed entirely on one side of said plane, said flanges extending to the other side of said plane, and means securing said flanges to said one end of said rotor, said securing means being positioned entirely on said other side of said plane.
Claim 6
Dependent Claim
20 words
A rotor as recited in claim 3 wherein said securing means comprise lugs received within apertures provided in said flanges.
Claim 7
Dependent Claim
20 words
A rotor as recited in claim 4, wherein the ends of said lugs are swaged over to secure said flanges.
Claim 8
Dependent Claim
20 words
A rotor as recited in claim 3 wherein said flanges extend outwardly from opposite circumferentially spaced ends of said body.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-01-08 | 1993-07-10 | 1994-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-08 | 1997-07-10 | 1998-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-08 | 2001-07-10 | 2002-01-09 | $7700.00 | Window Closed / Lapsed |