Patent US3579002A successfully refreshed from Google Patents.
US3579002A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reversing switch for power tools
Assignee: Black and Decker Corp
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Filing: 1970-03-31
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Granted: 1971-05-18
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Expires: 1990-03-31
Abstract
Abstract A portable power tool including a reversible electric motor, a housing having a handle adapted to be grasped by an operator, and a trigger switch adjacent the handle to be grasped by the operator''s finger for energizing the motor. The tool also includes a reversing switch. The operating member for the reversing switch comprises a T-shaped operating lever located above the trigger for convenient engagement by the operator. The base portion of the T-bar is connected through a pivot mounting to the reversing switch whereby rotation thereof through an arc causes operation of the switch. The arm portions of the T-bar extend toward the opposite sides of the tool and protrude slightly through apertures in the housing so that, upon engagement of one or the other by the operator''s hand, the reversing switch is moved between its forward and reverse positions.
Inventors
- 👤 John L Wickham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:56
CPC Classifications
H; H01; H01H; H01H9/00; H01H9/02; H01H9/06; H01H9/063
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
171 words
In a portable power tool including a reversible electric motor, a housing including a handle adapted to be grasped by an operator, a trigger switch adjacent said handle and arranged to be operated by the operator''s finger for energizing said motor, and a reversing switch for reversing the direction of operation of said motor, the improvement comprising: an operating lever for said reversing switch, said lever comprising a base portion and a transverse portion, said lever being disposed adjacent said trigger for convenient engagement by the operator; the base portion of said lever extending to a pivot mounting whereby rotation thereof through an arc about said pivot causes operation of said reversing switch; a pair of apertures on opposite sides of said housing; the ends of said transverse portion of said lever extending toward said apertures for engagement thereof by the operator; said lever being pivotable between two positions upon engagement by the operator with said ends of said transverse portion thereof to select forward or reverse operation of said motor.
Claim 2
Dependent Claim
171 words
In a portable power tool including a reversible electric motor, a housing including a handle adapted to be grasped by an operator, a trigger switch adjacent said handle and arranged to be operated by the operator''s finger for energizing said motor, and a reversing switch for reversing the direction of operation of said motor, the improvement comprising: an operating lever for said reversing switch, said lever comprising a base portion and a transverse portion, said lever being disposed adjacent said trigger for convenient engagement by the operator; the base portion of said lever extending to a pivot mounting whereby rotation thereof through an arc about said pivot causes operation of said reversing switch; a pair of apertures on opposite sides of said housing; the ends of said transverse portion of said lever extending toward said apertures for engagement thereof by the operator; said lever being pivotable between two positions upon engagement by the operator with said ends of said transverse portion thereof to select forward or reverse operation of said motor.
Claim 3
Dependent Claim
22 words
Apparatus as claimed in claim 1 wherein said lever is substantially T-shaped and said transverse portion is the crossbar of said T.
Claim 4
Dependent Claim
16 words
Apparatus as claimed in claim 1 wherein said lever is disposed immediately above said trigger switch.
Claim 5
Dependent Claim
16 words
Apparatus as claimed in claim 3 wherein said transverse portion is mounted transversely to said handle.
Claim 6
Dependent Claim
24 words
Apparatus as claimed in claim 1 wherein said lever is provided with interlocking means for preventing operation thereof when said trigger switch is depressed.
Claim 7
Dependent Claim
35 words
Apparatus as claimed in claim 5 wherein said interlocking means comprises a pin on said lever adapted to engage one of a pair of slots in said trigger switch when said trigger switch is depressed.
Claim 8
Dependent Claim
33 words
Apparatus as claimed in claim 1 wherein, when said lever is pivoted toward one side of said tool, the corresponding end of said transverse portion protrudes through the corresponding one of said apertures.
Claim 9
Dependent Claim
23 words
Apparatus as claimed in claim 7 wherein said ends, when protruding from said apertures, are shielded by an adjacent portion of said housing.
References Cited (Backward Citations)
US3467801A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-17 | 1974-11-16 | 1975-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-17 | 1978-11-16 | 1979-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-17 | 1982-11-16 | 1983-05-18 | $7700.00 | Window Closed / Lapsed |