US3909644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric motor unit for operation at high motor temperature
Assignee: Klein Schanzlin and Becker AG
•
Filing: 1974-03-25
•
Granted: 1975-09-30
•
Expires: 1994-03-25
Abstract
Abstract An electric motor of the type normally operated at high temperature has a connector housing constructed and arranged to maintain a lower temperature therein. Electric motor windings have end portions which extend from the motor through a duct into the connector housing. They are connected therein to external circuit means preferably by hard-soldered, welded or pinched connections.
Inventors
- 👤 Fritz Wieser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:26
CPC Classifications
H; H02; H02K; H02K5/00; H02K5/04; H02K5/22; H02K5/225; H02K5/12; H02K5/128
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
88 words
In an electric motor unit, a combination comprising a motor housing which is at high temperatures during operation thereof; electric motor windings mounted in said housing; a separate connector housing spaced from said motor housing and constructed and arranged to maintain substantially lower temperatures therein, said windings having end portions extending into said connector housing; a terminal box having an end wall in common with said separate connector housing; and terminals extending through said end wall for connecting end portions of said motor windings to external circuit means.
Claim 2
Dependent Claim
88 words
In an electric motor unit, a combination comprising a motor housing which is at high temperatures during operation thereof; electric motor windings mounted in said housing; a separate connector housing spaced from said motor housing and constructed and arranged to maintain substantially lower temperatures therein, said windings having end portions extending into said connector housing; a terminal box having an end wall in common with said separate connector housing; and terminals extending through said end wall for connecting end portions of said motor windings to external circuit means.
Claim 3
Dependent Claim
56 words
The combination defined in claim 1, also including a pump driven by said motor unit for pumping hot liquid, said unit including, in said motor housing: a central rotor; a tubular housing surrounding said rotor and normally filled with hot pumped liquid; and a stator around said tubular housing, said windings being part of said stator.
Claim 4
Dependent Claim
109 words
In an electric motor unit, the combination of a motor housing which is at high temperature during operation of the motor unit; electric motor windings in said housing; a separate connector housing spaced from said motor housing and constructed and arranged to maintain a substantially lower temperature therein than the high temperature of said motor housing, said winding having end portions extending into said connector housing for connecting them to each other and to external circuit means; duct means between said motor housing and said connector housing, said end portions of said motor windings extending through said duct means; and heat barrier means forming part of said duct means.
Claim 5
Dependent Claim
109 words
In an electric motor unit, the combination of a motor housing which is at high temperature during operation of the motor unit; electric motor windings in said housing; a separate connector housing spaced from said motor housing and constructed and arranged to maintain a substantially lower temperature therein than the high temperature of said motor housing, said winding having end portions extending into said connector housing for connecting them to each other and to external circuit means; duct means between said motor housing and said connector housing, said end portions of said motor windings extending through said duct means; and heat barrier means forming part of said duct means.
Claim 6
Dependent Claim
30 words
The combination defined in claim 3 wherein said heat barrier means is spaced from said motor housing and comprises means for transferring heat from said duct means to the atmosphere.
References Cited (Backward Citations)
US2512407A
Cited
US2683227A
Cited
US2768267A
Cited
US3010401A
Cited
US3033537A
Cited
US3495111A
Cited
US3798504A
Cited
US3716733A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |