US3699366A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power tool with motor support means
Assignee: Black and Decker Corp
•
Filing: 1971-06-07
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Granted: 1972-10-17
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Expires: 1991-06-07
Abstract
Abstract A power tool having a plastic housing containing a unitized motor assembly. The motor assembly includes a cylindrical sheet metal support which provides permanently stable location of all of the functional motor parts.
Inventors
- 👤 John W Wood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:06
CPC Classifications
H; H02; H02K; H02K5/00; H02K5/04; H02K7/00; H02K7/14; H02K7/145
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
139 words
In a portable electric power tool including a housing, a device extending from said housing for producing an output, and an electric motor mounted in said housing for driving said device, said motor including an annular field structure, the combination therewith of a one-piece, generally cylindrical support for said field; said support having means for mounting a bearing at one end thereof; flange means on the other end of said support for accurately mounting said support in said tool; a mounting member having a pilot surface in said tool for receiving said flange; threaded means extending through said field and coupled to said mounting member for retaining said field in said tool; and means on said support adjacent said other end engaged by said field whereby tightening of said threaded means draws said flange means against said pilot surface.
Claim 2
Dependent Claim
139 words
In a portable electric power tool including a housing, a device extending from said housing for producing an output, and an electric motor mounted in said housing for driving said device, said motor including an annular field structure, the combination therewith of a one-piece, generally cylindrical support for said field; said support having means for mounting a bearing at one end thereof; flange means on the other end of said support for accurately mounting said support in said tool; a mounting member having a pilot surface in said tool for receiving said flange; threaded means extending through said field and coupled to said mounting member for retaining said field in said tool; and means on said support adjacent said other end engaged by said field whereby tightening of said threaded means draws said flange means against said pilot surface.
Claim 3
Dependent Claim
27 words
A power tool as claimed in claim 1 wherein said support further comprises a web portion extending from said bearing support portion to a generally cylindrical portion.
Claim 4
Dependent Claim
24 words
A power tool as claimed in claim 1 wherein said tool further comprises an insulative housing, said motor support being located within said housing.
Claim 5
Dependent Claim
25 words
A power tool as claimed in claim 3 wherein said support cooperates with said housing to limit air flow to a path through said motor.
Claim 6
Dependent Claim
26 words
A power tool as claimed in claim 1 wherein said means engaged by said field comprises a plurality of indented portions formed in said cylindrical support.
Claim 7
Dependent Claim
115 words
In a portable electric power tool including an insulative housing, a device extending from said housing for producing an output, and an electric motor mounted in said housing for driving said device; the combination therewith of a one-piece, generally cylindrical support for said motor; said support having means for mounting a bearing at one end thereof; an insulated armature shaft received in said bearing; said support further comprising mounting means for receiving a plurality of brush-holders thereon; flange means on the other end of said support for accurately mounting said support in said tool; an insulative baffle having a pilot surface for receiving said flange; and means for retaining said support tightly against said surface.
Claim 8
Dependent Claim
115 words
In a portable electric power tool including an insulative housing, a device extending from said housing for producing an output, and an electric motor mounted in said housing for driving said device; the combination therewith of a one-piece, generally cylindrical support for said motor; said support having means for mounting a bearing at one end thereof; an insulated armature shaft received in said bearing; said support further comprising mounting means for receiving a plurality of brush-holders thereon; flange means on the other end of said support for accurately mounting said support in said tool; an insulative baffle having a pilot surface for receiving said flange; and means for retaining said support tightly against said surface.
Claim 9
Dependent Claim
107 words
In a portable electric power tool including an insulative housing, a device for producing an output, and an electric motor in said housing for driving said device, the combination therewith of an improved motor retaining structure comprising a generally cylindrical sheet metal support in said housing and including means for retaining a stationary motor field within said support; means for retaining a bearing at one end of said support; the other end of said support being adapted for mounting to a piloting surface; and a pair of radially directed tang portions integral with said support, each of said tang portions including means for supporting insulating brushholders thereon.
Claim 10
Dependent Claim
107 words
In a portable electric power tool including an insulative housing, a device for producing an output, and an electric motor in said housing for driving said device, the combination therewith of an improved motor retaining structure comprising a generally cylindrical sheet metal support in said housing and including means for retaining a stationary motor field within said support; means for retaining a bearing at one end of said support; the other end of said support being adapted for mounting to a piloting surface; and a pair of radially directed tang portions integral with said support, each of said tang portions including means for supporting insulating brushholders thereon.
Claim 11
Dependent Claim
106 words
In a portable electric power tool including a device for producing an output and an electric motor for driving said device, the combination therewith of an improved motor retaining structure comprising a generally cylindrical sheet metal support including means for retaining a stationary motor field within said support; means for retaining a bearing at one end of said support; the other end of said support being adapted for mounting to a piloting surface; means integral with said support for supporting insulating brushholders thereon; and means extending coaxially with said support for drawing said support tightly against said piloting surface to align said motor within said housing.
Claim 12
Dependent Claim
106 words
In a portable electric power tool including a device for producing an output and an electric motor for driving said device, the combination therewith of an improved motor retaining structure comprising a generally cylindrical sheet metal support including means for retaining a stationary motor field within said support; means for retaining a bearing at one end of said support; the other end of said support being adapted for mounting to a piloting surface; means integral with said support for supporting insulating brushholders thereon; and means extending coaxially with said support for drawing said support tightly against said piloting surface to align said motor within said housing.
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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) | 1975-10-17 | 1976-04-17 | 1976-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-17 | 1980-04-17 | 1980-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-17 | 1984-04-17 | 1984-10-17 | $7700.00 | Window Closed / Lapsed |