Patent US3656016A successfully refreshed from Google Patents.
US3656016A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Subframe for power tool having double insulated brush holders
Assignee: GW Murphy Industries Inc
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Filing: 1970-10-06
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Granted: 1972-04-11
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Expires: 1990-10-06
Abstract
Abstract A subframe for a power tool comprised of first and second frame members secured together in contiguous engagement throughout a substantial portion of their peripheries. The frame members include complementary cut outs defining a motor receiving opening. A pair of brush receiving spaces are defined by a pair of stuck out portions on opposite sides of the motor receiving opening in one of the frame members together with an opposed notch in the other of the frame members. Each of the brush receiving spaces is adapted to receive one or more insulating inserts for holding brushes.
Inventors
- 👤 Anthony Jacyno
- 👤 Harold R Botefuhr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:04
CPC Classifications
H; H02; H02K; H02K5/00; H02K5/04; H02K5/14; H02K5/143; H02K5/148; H02K7/00; H02K7/14; H02K7/145
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
99 words
A subframe for a power tool comprising: first and second plate-like frame members, in contiguous engagement throughout a substantial portion of their peripheries; means securing said frame members together; means in said frame members receiving a motor and including complementary cut outs in each of said frame members defining a motor receiving opening; and means defining a pair of brush receiving spaces located on opposite sides of said opening, each said space being defined by a struck out portion in one of said frame members and bounded by a substantially planar portion of the other of the frame members.
Claim 2
Dependent Claim
99 words
A subframe for a power tool comprising: first and second plate-like frame members, in contiguous engagement throughout a substantial portion of their peripheries; means securing said frame members together; means in said frame members receiving a motor and including complementary cut outs in each of said frame members defining a motor receiving opening; and means defining a pair of brush receiving spaces located on opposite sides of said opening, each said space being defined by a struck out portion in one of said frame members and bounded by a substantially planar portion of the other of the frame members.
Claim 3
Dependent Claim
24 words
The subframe of claim 1 wherein said struck out portions and said planar portions define brush receiving spaces having a uniform, rectangular cross section.
Claim 4
Dependent Claim
55 words
The subframe of claim 2 further including a pair of brush holding means, one in each of said spaces, and each comprised of an outer, insulating insert received in one of said spaces, and an inner brush holder formed of insulating material received in said outer insert, and lead gripping means on said outer insert.
Claim 5
Dependent Claim
131 words
A subframe for a power tool comprising: first and second stamped metal plate-like frame members in contiguous engagement throughout a substantial portion of their pEripheries; means securing said frame members together; means in said frame members for receiving a motor and including complementary cut outs in each of said frame members defining a motor receiving opening; complementary struck out portions in said frame members adjacent opposite sides of said opening for receiving bearings adapted to rotatably mount in a motor shaft; and means defining a pair of brush receiving spaces located on opposite sides of said opening different from said first mentioned sides, each said space being defined by struck out portion in one of said frame members and a notch in the other frame member opposite the struck out portion.
Claim 6
Dependent Claim
131 words
A subframe for a power tool comprising: first and second stamped metal plate-like frame members in contiguous engagement throughout a substantial portion of their pEripheries; means securing said frame members together; means in said frame members for receiving a motor and including complementary cut outs in each of said frame members defining a motor receiving opening; complementary struck out portions in said frame members adjacent opposite sides of said opening for receiving bearings adapted to rotatably mount in a motor shaft; and means defining a pair of brush receiving spaces located on opposite sides of said opening different from said first mentioned sides, each said space being defined by struck out portion in one of said frame members and a notch in the other frame member opposite the struck out portion.
Claim 7
Dependent Claim
147 words
The subframe of claim 4 further including a pair of brush holding means, one for each of said brush receiving spaces; each of said brush holding means comprising a first hollow insert adapted to snugly fit in a respective one of said spaces, said insert further including a securing portion adapted to overlap the frame member having the notch therein, and fastening means associated with said securing portion for securing the insert to said notched frame member, and a brush holding insert receiving within the hollow of said first mentioned insert for holding a motor brush, fastening means for securing said inner insert to said subframe, and means on one of said inserts defining a projection away from said subframe, said projection including a notch therein adapted to receive an electrical lead extending to the brush in said inner insert; said inserts being formed of insulating material.
Claim 8
Dependent Claim
15 words
The subframe of claim 5 wherein both of said fastening means comprise a single element.
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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) | 1975-04-11 | 1975-10-11 | 1976-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-11 | 1979-10-11 | 1980-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-11 | 1983-10-11 | 1984-04-11 | $7700.00 | Window Closed / Lapsed |