US3747594A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable electric appliance
Assignee: AF Dormeyer Manufacturing Co Inc
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Filing: 1971-11-19
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Granted: 1973-07-24
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Expires: 1991-11-19
Abstract
Abstract The appliance includes a hand-held motor unit with a motor output end for receiving a plurality of interchangeable working tool heads wherein the motor transmits power to the heads for operating same. An eccentric is provided on the output shaft of the motor for engagement with a yoke on a work tool head to convert rotary motion of the motor to reciprocating or oscillating motion. A releasable clip engages with socket means on the heads for attaching and retaining the head in place on the motor unit.
Inventors
- 👤 W Bishop
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:06
CPC Classifications
B; B26; B26B; B26B19/00; B26B19/38; B26B19/48; A; A61; A61H; A61H7/00; A61H7/002; A61H7/004; A61H7/005
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
128 words
A portable electric appliance comprising a power unit adapted to receive interchangeable heads and a detachable head, said power unit including a motor mounted in a casing rotationally driving an eccentric, orientation means extending from the casing in the form of guide pins for orienting the head relative the unit, and releasable coupling means carried by the casing in the form of spring clips for detachably securing the head to the power unit, said detachable head including a housing, said housing including guide holes for receiving said pins and sockets coacting with said clips, a work tool mounted on the housing for movement relative the housing, yoke means within the housing connected to the work tool and coacting with the eccentric to transmit power to the work tool.
Claim 2
Dependent Claim
128 words
A portable electric appliance comprising a power unit adapted to receive interchangeable heads and a detachable head, said power unit including a motor mounted in a casing rotationally driving an eccentric, orientation means extending from the casing in the form of guide pins for orienting the head relative the unit, and releasable coupling means carried by the casing in the form of spring clips for detachably securing the head to the power unit, said detachable head including a housing, said housing including guide holes for receiving said pins and sockets coacting with said clips, a work tool mounted on the housing for movement relative the housing, yoke means within the housing connected to the work tool and coacting with the eccentric to transmit power to the work tool.
Claim 3
Dependent Claim
47 words
A portable electric appliance as defined in claim 1, wherein the work tool of said detachable head includes a massaging member attached to a pivotable shafT carried by the housing, and said yoke means being mounted on the shaft, whereby oscillating motion is applied to the shaft.
Claim 4
Dependent Claim
34 words
A portable electric appliance as defined in claim 2, wherein dampening means is provided in the housing between the housing and yoke to dampen movement of the yoke and shaft and thereby reduce noise.
Claim 5
Dependent Claim
17 words
A portable electric appliance as defined in claim 3, wherein said dampening means includes a resilient pad.
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) | 1976-07-23 | 1977-01-22 | 1977-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-23 | 1981-01-22 | 1981-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-23 | 1985-01-22 | 1985-07-24 | $7700.00 | Window Closed / Lapsed |