Patent US3735171A successfully refreshed from Google Patents.
US3735171A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flat commutator structure
Assignee: US Philips Corp
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Filing: 1971-09-13
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Granted: 1973-05-22
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Expires: 1991-09-13
Abstract
Abstract A flat commutator structure having commutator segments which are made by stamping from sheet material and at their ends facing the shaft are anchored in a hub made of a synthetic material by injection moulding. To increase the flatness of the commutator face the commutator segments are also interconnected by anchoring elements near the outer periphery of the commutator. Both the hub and the latter anchoring elements may form parts of a single commutator support made from a synthetic material by injection moulding and preferably have open chambers into which the grooves separating the commutator segments terminate.
Inventors
- 👤 De Griend J Van
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:37
CPC Classifications
H; H02; H02K; H02K11/00; H02K11/02; H01; H01R; H01R39/00; H01R39/02; H01R39/04; H01R39/06; H01R43/00; H01R43/06; H01R43/08
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
73 words
A commutator structure for a small electrodynamic machine, comprising: A. an insulative commutator support having a hub member and a plurality of peripherally spaced anchoring elements; and B. a plurality of substantially flat metallic elements defining separate and distinct collector segments each having an inner portion and an outer portion, said inner portion of each segment being anchored To said hub member, and said outer portion being connected to said peripheral anchoring elements.
Claim 2
Dependent Claim
73 words
A commutator structure for a small electrodynamic machine, comprising: A. an insulative commutator support having a hub member and a plurality of peripherally spaced anchoring elements; and B. a plurality of substantially flat metallic elements defining separate and distinct collector segments each having an inner portion and an outer portion, said inner portion of each segment being anchored To said hub member, and said outer portion being connected to said peripheral anchoring elements.
Claim 3
Dependent Claim
24 words
The commutator structure of claim 1, wherein the hub member and said peripheral anchoring elements are integrally formed to define a one-piece commutator structure.
Claim 4
Dependent Claim
16 words
The commutator structure of claim 1, wherein there are three collector segments, and three anchoring elements.
Claim 5
Dependent Claim
19 words
The commutator structure of claim 1, wherein each collector segment is connected to a pair of peripheral anchoring elements.
Claim 6
Dependent Claim
19 words
The commutator structure of claim 4, wherein each collector segment shares a peripheral anchoring element with another collector segment.
Claim 7
Dependent Claim
16 words
The commutator structure of claim 1, wherein a disc-shaped anti-interference member is disposed upon the hub.
Claim 8
Dependent Claim
38 words
The commutator structure of claim 6, wherein each of said collector segments has a lug located upon an outer periphery thereof which is anchored in, and extends through, the commutator support to make contact with said anti-interference member.
Claim 9
Dependent Claim
35 words
The commutator structure of claim 1, wherein said collector segments are separated upon the support so as to define grooves therebetween, and further wherein said grooves are positioned over open chambers formed in said support.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |