US3620269A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable chain saw with antivibration handle
Assignee: Individual
•
Filing: 1969-08-22
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Granted: 1971-11-16
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Expires: 1989-08-22
Abstract
Abstract In a portable chain saw powered by a reciprocating engine, vibrations from the engine to the handle grasped by the operator(s) are absorbed by forming the handle with a core which is rigidly attached to the chain saw body and a sheath which surrounds the handle in spaced relation and held relatively to the core by a spacer of yieldable material, such as one or more pieces of rubberlike material or corrugated leaf springs or radial coiled expansion springs which engage both the core and the sheath, the latter being grasped by the operator.
Inventors
- 👤 Alfonso Lange
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:41
CPC Classifications
F; F16; F16F; F16F1/00; F16F1/36; F16F1/38; B; B27; B27B; B27B17/00; B27B17/0033; F16F15/00; F16F15/02; F16F15/04; F16F15/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
173 words
In a portable power chain saw which comprises a saw chain, body means including a part for supporting and guiding said chain, a motor unit mounted on said body means and including a reciprocable piston connected to drive said chain, and handle means, the improvement wherein said handle means include: a. a core rigidly attached to said body means, b. a stiff sheath adapted to be grasped by hand which surrounds said core in spaced relation to provide an intervening space and which is movable relatively to the core in all radial directions, and c. yieldable spacer means situated within said space for positioning the core relatively to the sheath, said spacer means comprising a plurality of elongated elastic elements situated at positions spaced along the length of the core and having their axes angularly related, each element being in abutment at one end thereof with the core and at the other end thereof with the sheath, whereby vibrations from the motor acting on the core are partly absorbed by the spacer means.
Claim 2
Dependent Claim
173 words
In a portable power chain saw which comprises a saw chain, body means including a part for supporting and guiding said chain, a motor unit mounted on said body means and including a reciprocable piston connected to drive said chain, and handle means, the improvement wherein said handle means include: a. a core rigidly attached to said body means, b. a stiff sheath adapted to be grasped by hand which surrounds said core in spaced relation to provide an intervening space and which is movable relatively to the core in all radial directions, and c. yieldable spacer means situated within said space for positioning the core relatively to the sheath, said spacer means comprising a plurality of elongated elastic elements situated at positions spaced along the length of the core and having their axes angularly related, each element being in abutment at one end thereof with the core and at the other end thereof with the sheath, whereby vibrations from the motor acting on the core are partly absorbed by the spacer means.
Claim 3
Dependent Claim
50 words
A chain saw according to claim 1 wherein said core is formed to provide a plurality of sockets having abutments at their inner ends, and each of said elongated elements has one end thereof situated within one of said sockets in abutting relation to the abutment of the respective socket.
Claim 4
Dependent Claim
33 words
A chain saw according to claim 2 wherein said core is tubular in form, and each of said sockets includes a substantially radially extending tubular guide which is fixed to the tubular core.
Claim 5
Dependent Claim
40 words
A chain saw according to claim 2 wherein each of said elongated elements has a cap interposed between the outer end of the element and the sheath and secured to the element, said caps being slidable relatively to the sheath.
Claim 6
Dependent Claim
16 words
A chain saw according to claim 1 wherein saId elastic expansion elements are tubular in shape.
Claim 7
Dependent Claim
15 words
A chain saw according to claim 5 wherein said tubular expansion elements are coiled springs.
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) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |