US3908139A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable power tools
Assignee: SINGER ACQUISITION HOLDINGS COMPANY 8 STAMFORD FORUM STAMFORD CT 06904 A DE CORP
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Filing: 1974-06-10
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Granted: 1975-09-23
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Expires: 1994-06-10
Abstract
Abstract A portable power tool having a tool head extending from a power unit housing comprising first and second housing segments joined together in clam shell fashion. A detachable annular fastener receiving member is seated in fixed position in the cojoined housing segments for reception of screws extending through the tool head. Progressive engagement of the screws with the fastener receiving member draws the tool head against the housing segments such that the tool head is clamped to the housing segments. Alignment surfaces formed on the tool head are engageable with corresponding alignment surfaces formed on the housing segments to align the tool head with respect to the housing segments and the fastener receiving member.
Inventors
- 👤 Jr Avery A Duncan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:45
CPC Classifications
H; H02; H02K; H02K7/00; H02K7/14; H02K7/145; B; B23; B23B; B23B45/00; B23B45/001; B25; B25F; B25F5/00; B25F5/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
216 words
In combination in a portable power tool: a. a power unit housing comprising first and second housing segments; b. means for securing said housing segments together; c. each of said housing segments including an interior surface; d. tool head means extending from said housing segments; e. said tool head means being detachable from said housing segments and including a contact surface for bearing against said housing segments; f. clamping means for detachably clamping said tool head means to said housing segments; g. said clamping means comprising a detachable fastener receiving member removably disposed in said housing segments; h. said retaining means formed in each of said housing segments including an elongated slot formed on the interior surface thereof for holding said fastener receiving member in a predetermined fixed position in said housing segments; i. said clamping means further including fastening means for engaging said fastener receiving member, and j. said fastening means being located in and extending through said tool head means to progressively engage said fastener receiving member and draw said tool heaD means toward said first and second housing segments to permit said contact surface to bearingly engage said housing segments whereby said fastening means clamp said tool head means to said first and second housing segments by engagement with said fastener receiving member.
Claim 2
Dependent Claim
216 words
In combination in a portable power tool: a. a power unit housing comprising first and second housing segments; b. means for securing said housing segments together; c. each of said housing segments including an interior surface; d. tool head means extending from said housing segments; e. said tool head means being detachable from said housing segments and including a contact surface for bearing against said housing segments; f. clamping means for detachably clamping said tool head means to said housing segments; g. said clamping means comprising a detachable fastener receiving member removably disposed in said housing segments; h. said retaining means formed in each of said housing segments including an elongated slot formed on the interior surface thereof for holding said fastener receiving member in a predetermined fixed position in said housing segments; i. said clamping means further including fastening means for engaging said fastener receiving member, and j. said fastening means being located in and extending through said tool head means to progressively engage said fastener receiving member and draw said tool heaD means toward said first and second housing segments to permit said contact surface to bearingly engage said housing segments whereby said fastening means clamp said tool head means to said first and second housing segments by engagement with said fastener receiving member.
Claim 3
Dependent Claim
63 words
The combination of claim 1 wherein said fastener receiving member has opposite side portions and said means for securing said housing segments together positions the elongated slots in each said housing segment such that the opposite side portions of said fastener receiving member are seated in said elongated slots to fix the position of said fastener receiving member in said co-joined housing segments.
Claim 4
Dependent Claim
29 words
The combination of claim 1 wherein said fastener receiving member comprises a rigid annular member having a plurality of threaded holes formed therein for engagement by said fastening means.
Claim 5
Dependent Claim
60 words
The combination of claim 1 wherein said securing means include first detachable screw members arranged in said housing segments such that detachment of said first screw members from said housing segments permits separation of said segments from each other and from said tool head means and said fastener receiving member without unfastening said fastening means from said fastener receiving member.
Claim 6
Dependent Claim
33 words
The combination of claim 1 wherein said fastening means include second detachable screw members arranged in said tool head means such that said second screw members bypass physical engagement with said housing segments.
Claim 7
Dependent Claim
61 words
The combination of claim 1 wherein said housing segments each include an interior surface, said housing segments further including alignment means formed on the interior surfaces thereof for engagement with said tool head means to align said tool head means in a predetermined position with respect to said housing segments, when said tool head means is clamped to said housing segments.
Claim 8
Dependent Claim
48 words
The combination of claim 1 wherein said tool head means include alignment means formed thereon for engagement with said housing segments to align said tool head means in a predetermined position with respect to said housing segments when said tool head means is clamped to said housing segments.
Claim 9
Dependent Claim
57 words
The combination of claim 7 wherein said alignment means include at least two elongated flange portions projecting from said contact surface, each of said flange portions having a free end surface with at least one of said end surfaces engaging one of said housing segments and another of said end surfaces engaging the other said housing segment.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-22 | 1979-03-24 | 1979-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-22 | 1983-03-24 | 1983-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-22 | 1987-03-24 | 1987-09-23 | $7700.00 | Window Closed / Lapsed |