US3613751A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable screwdriver
Assignee: Monogram Industries Inc
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Filing: 1969-07-24
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Granted: 1971-10-19
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Expires: 1989-07-24
Abstract
Abstract An adjustable screwdriver assembly in which an adjustable spring assembly is employed operating upon a ball slip clutch assembly, the spring assembly comprising a plurality of belleville washers. The clutch assembly is connected to a gear transmission unit which in turn is capable of effecting rotation of the screwdriver bit. The screwdriver bit is retained in place by an adjustable ball and groove connection.
Inventors
- 👤 Daniel P Juhasz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:57
CPC Classifications
B; B25; B25B; B25B21/00; B25B23/00; B25B23/0007; B25B23/0035; B25B23/14; B25B23/141
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
290 words
An adjustable screwdriver assembly comprising: a power input shaft; an adjustable nut assembly threadably secured to said power input shaft; a biasing assembly surrounding said input shaft and being in contact with said nut assembly, said biasing assembly comprising a plurality of belleville washers; a clutching assembly including a retaining sleeve assembly and a clutch plate, said biasing assembly being in contact with said retaining sleeve assembly, said retaining sleeve assembly being fixed to said input shaft, a plurality of balls each supported within a particular location within said retaining sleeve assembly, said balls also being normally resting in individual recesses formed within said clutch plate, said biasing assembly normally tending to maintain said balls within said recesses; a power transmitting assembly including a first gear element and a second gear element, said first gear element being directly connected to said clutch plate, said second gear element being directly connected to an output drive element, a second biasIng assembly located intermediate said first and second gear elements and normally maintaining disengagement of said gear elements; a housing surrounding said biasing assembly and said clutching assembly and said power transmitting assembly, said input shaft and said drive element extending exteriorly of said housing; a screwdriver bit retaining unit connected to said drive element and located exteriorly of said housing, said screwdriver bit retaining unit including a longitudinally movable sleeve located about said drive element, a third biasing means connected between said drive element and said sleeve, upon movement of said sleeve away from said housing against the bias of said third biasing means removal and insertion of the screwdriver bit is permitted within said unit, said sleeve being readily graspable by a human hand to facilitate the movement of said sleeve.
Claim 2
Dependent Claim
290 words
An adjustable screwdriver assembly comprising: a power input shaft; an adjustable nut assembly threadably secured to said power input shaft; a biasing assembly surrounding said input shaft and being in contact with said nut assembly, said biasing assembly comprising a plurality of belleville washers; a clutching assembly including a retaining sleeve assembly and a clutch plate, said biasing assembly being in contact with said retaining sleeve assembly, said retaining sleeve assembly being fixed to said input shaft, a plurality of balls each supported within a particular location within said retaining sleeve assembly, said balls also being normally resting in individual recesses formed within said clutch plate, said biasing assembly normally tending to maintain said balls within said recesses; a power transmitting assembly including a first gear element and a second gear element, said first gear element being directly connected to said clutch plate, said second gear element being directly connected to an output drive element, a second biasIng assembly located intermediate said first and second gear elements and normally maintaining disengagement of said gear elements; a housing surrounding said biasing assembly and said clutching assembly and said power transmitting assembly, said input shaft and said drive element extending exteriorly of said housing; a screwdriver bit retaining unit connected to said drive element and located exteriorly of said housing, said screwdriver bit retaining unit including a longitudinally movable sleeve located about said drive element, a third biasing means connected between said drive element and said sleeve, upon movement of said sleeve away from said housing against the bias of said third biasing means removal and insertion of the screwdriver bit is permitted within said unit, said sleeve being readily graspable by a human hand to facilitate the movement of said sleeve.
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) | 1974-10-18 | 1975-04-19 | 1975-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-18 | 1979-04-19 | 1979-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-18 | 1983-04-19 | 1983-10-19 | $7700.00 | Window Closed / Lapsed |