Patent US3554197A successfully refreshed from Google Patents.
US3554197A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable power-operated saw
Assignee: Air Compressors and Tools Ltd
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Filing: 1968-07-22
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Granted: 1971-01-12
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Expires: 1988-07-22
Abstract
Abstract A portable power-operated saw comprising a blade with actuate teeth thereon which oscillates by means of a motor driving the blade and in which the output shaft of the motor rotates about an axis which cuts the axis about which the saw oscillates and the rotary motion of the motor is converted into the oscillating motion of the blade by a flat bladelike spring, one end of which is drivingly connected and parallel to the saw blade, while the other end of the spring is mounted by means of a spigot in a bearing on the output shaft of the motor and is eccentric therewith.
Inventors
- 👤 Arthur Kenneth Dobbie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:19
CPC Classifications
B; B23; B23Q; B23Q5/00; B23Q5/02; B23Q5/027; A; A61; A61B; A61B17/00; A61B17/14; A61B17/142; B27; B27B; B27B19/00; B27B19/006; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18232
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
161 words
A portable power-operated saw having a blade with teeth thereon arranged in a segment of a circle, which teeth in use oscillate about the center of the circle, and a motor for driving the blade, the improvement comprising an output shaft of the motor which rotates about an axis which intersects the axis about which the saw oscillates; means for converting the rotary motion of the motor into the oscillating motion of the blade, which means comprises a flat bladelike spring, one end of which is drivingly connected to the saw blade by a shaft while the other end is mounted, by means of a spigot, in a bearing eccentrically mounted on the output shaft of the motor; said means for converting the rotary motion into oscillating motion being contained in a casing having a noselike portion including a recess; and one end of the saw shaft being mounted for restricted rotational movement in said recess by means of silicone rubber.
Claim 2
Dependent Claim
161 words
A portable power-operated saw having a blade with teeth thereon arranged in a segment of a circle, which teeth in use oscillate about the center of the circle, and a motor for driving the blade, the improvement comprising an output shaft of the motor which rotates about an axis which intersects the axis about which the saw oscillates; means for converting the rotary motion of the motor into the oscillating motion of the blade, which means comprises a flat bladelike spring, one end of which is drivingly connected to the saw blade by a shaft while the other end is mounted, by means of a spigot, in a bearing eccentrically mounted on the output shaft of the motor; said means for converting the rotary motion into oscillating motion being contained in a casing having a noselike portion including a recess; and one end of the saw shaft being mounted for restricted rotational movement in said recess by means of silicone rubber.
Claim 3
Dependent Claim
54 words
A power-operated saw as claimed in claim 1, in which the saw blade and said one end of the spring are parallel to one another, while the axis of rotation of the spigot mounted in the eccentric bearing passes through the axis of rotation of the saw where the spring is drivingly connected thereto.
Claim 4
Dependent Claim
45 words
A power-operated saw as claimed in claim 1, in which the saw blade is splined to the saw shaft which is at right angles to the driving shaft of the motor, and the axis of the motor shaft intersects the axis of the saw shaft.
Claim 5
Dependent Claim
19 words
A power-operated saw as claimed in claim 3, wherein said casing is detachable from a casing for the motor.
Claim 6
Dependent Claim
47 words
A power-operated saw as claimed in claim 1, in which said recess is cylindrical and contains a ball mounted on the axis of the cylinder between the end of the cylindrical recess and the end of the shaft to maintain the shaft coaxial with the cylindrical recess.
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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |