US3759336A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interchangeable power operated tools
Assignee: Individual
•
Filing: 1972-01-21
•
Granted: 1973-09-18
•
Expires: 1992-01-21
Abstract
Abstract Power operated tools of several types may be detachably connected to a portable power unit by means of complementary coupling members on each tool and a power unit. The coupling members in the form of collars on the power unit and a tool telescope together and the driving shaft of the power unit moves axially into driving engagement with a driven shaft of the tool. A detachable, spring biased fastener provides for quickly changing from one tool mounted on the power unit to a tool of another type.
Inventors
- 👤 D Marcovitz
- 👤 H Vocker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:48
CPC Classifications
B; B25; B25F; B25F3/00; B23; B23B; B23B31/00; B23B31/02; B23B31/10; B23B45/00; B23B45/003; Y; Y10; Y10T; Y10T279/00; Y10T279/34; Y10T279/3406; Y10T279/3412; Y10T408/00; Y10T408/31
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
178 words
In a power tool in which any of several portable tools may be mounted on and coupled selectively to a portable power unit, said power unit comprising a casing having a power source, a handle and a manual element adjacent said handle to control said power source, a driving shaft extending from said casing and operated by said power source, and a coupling thereon comprising a separately formed collar fastened to said casing coaxial with said driving shaft and having bearings for said driving shaft, and a tool having a driven shaft for operating said tool, a coupling thereon comprising a separately formed collar fastened to said tool coaxial with said driven shaft and having bearings for said driven shaft, said shafts having axially engageable drive connections interengageable for driving said driven shaft by said driving shaft, said collars having coaxial, complementary, axially telescoping coupling formations to secure said tool on said power unit with said shafts in driving engagement when said collars are telescoped together, and spring biased fastener means to fasten said collars in assembled relation.
Claim 2
Dependent Claim
178 words
In a power tool in which any of several portable tools may be mounted on and coupled selectively to a portable power unit, said power unit comprising a casing having a power source, a handle and a manual element adjacent said handle to control said power source, a driving shaft extending from said casing and operated by said power source, and a coupling thereon comprising a separately formed collar fastened to said casing coaxial with said driving shaft and having bearings for said driving shaft, and a tool having a driven shaft for operating said tool, a coupling thereon comprising a separately formed collar fastened to said tool coaxial with said driven shaft and having bearings for said driven shaft, said shafts having axially engageable drive connections interengageable for driving said driven shaft by said driving shaft, said collars having coaxial, complementary, axially telescoping coupling formations to secure said tool on said power unit with said shafts in driving engagement when said collars are telescoped together, and spring biased fastener means to fasten said collars in assembled relation.
Claim 3
Dependent Claim
70 words
In a power tool as claimed in claim 1, in which the collar having the male coupling telescoping formation is fastened on the power unit and the shaft extending beyond the coupling formation has bearings at the inner and outer ends of the collar, so that the shaft on the power unit extends within the female coupling telescoping formation on the tool to engage the shorter shaft on the tool.
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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) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |