Patent US549992A successfully refreshed from Google Patents.
Patent US3563134A successfully refreshed from Google Patents.
US3563134A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air-operated tool
Assignee: Individual
•
Filing: 1969-02-10
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Granted: 1971-02-16
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Expires: 1989-02-10
Abstract
Abstract The device is an air-operated tool, particularly of the type used for rubbing, sanding or filing, that is, having a reciprocatory motion. The tool embodies a single double-ended piston in a bore, with a rack positioned between the ends of the piston. A reciprocatable shoe carries a second rack and a pinion gear is mounted between the two racks on a transverse axis the piston and shoe reciprocating in opposite directions. A rotarytype valve controls the admission to, and exhaust air from, the opposite ends of the piston while reciprocation is imparted to the shoe. The mass of the piston is balanced with respect to the shoe whereby vibration of the tool during operation is reduced to a minimum.
Inventors
- 👤 Harvey B Rodstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:19
CPC Classifications
B; B24; B24B; B24B23/00; B24B23/04; B24B23/043; B23; B23Q; B23Q5/00; B23Q5/02; B23Q5/027; B23Q5/033
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
130 words
A manually held fluid-actuated tool comprising a body defining a cylinder bore, piston means comprising a single double-ended piston reciprocatable in the bore, valve means having communication with said bore and means whereby the valve means are operated in response to the reciprocation of the piston means to control admission and release of fluid pressure with respect to the bore for actuating the piston means, rack means carried by the piston means, a reciprocatable shoe, a rack carried by said reciprocatable shoe, and a driving pinion gear interposed between said racks whereby the piston means and shoe are driven in opposite directions, the mass of the reciprocatable piston means being balanced with respect to the mass of the reciprocatable shoe whereby vibration of the device is reduced to a minimum.
Claim 2
Dependent Claim
130 words
A manually held fluid-actuated tool comprising a body defining a cylinder bore, piston means comprising a single double-ended piston reciprocatable in the bore, valve means having communication with said bore and means whereby the valve means are operated in response to the reciprocation of the piston means to control admission and release of fluid pressure with respect to the bore for actuating the piston means, rack means carried by the piston means, a reciprocatable shoe, a rack carried by said reciprocatable shoe, and a driving pinion gear interposed between said racks whereby the piston means and shoe are driven in opposite directions, the mass of the reciprocatable piston means being balanced with respect to the mass of the reciprocatable shoe whereby vibration of the device is reduced to a minimum.
Claim 3
Dependent Claim
19 words
A tool as in claim 1 wherein said first rack is positioned between opposite ends of the piston means.
Claim 4
Dependent Claim
16 words
A tool as in claim 1 having the single double-ended piston positioned over the reciprocatable shoe.
Claim 5
Dependent Claim
21 words
A tool as in claim 3 wherein the piston means has a central position between the ends of the reciprocatable shoe.
Claim 6
Dependent Claim
36 words
A tool as in claim 1 including a further rack driven by said piston means, said valve means being a rotary-type valve and a pinion gear driven by said further rack operating said rotary valve means.
Claim 7
Dependent Claim
16 words
A tool as in claim 5 wherein the axis of the rotary valve means is vertical.
Claim 8
Dependent Claim
18 words
A tool as in claim 1 wherein said valve means is positioned at one end of the bore.
References Cited (Backward Citations)
US1953534A
Cited
US1954489A
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US2080451A
Cited
US2120300A
Cited
US2521566A
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US3214823A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |