US3889763A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vibration isolation handle for portable chain saw or the like
Assignee: Skil Corp
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Filing: 1973-10-31
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Granted: 1975-06-17
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Expires: 1993-10-31
Abstract
Abstract A gasoline powered internal combustion engine is directly and rigidly mounted to the frame of the portable chain saw such that upon operation of the engine the frame means vibrate at a disturbing frequency W. A handle in the form of an elongated, homogeneous, flexible member has at least one end thereof rigidly secured to the frame means. This handle, as a consequence of its material composition, of its shape and of the manner of its connection to the frame means, has a natural vibratory frequency Wn, such that D R A W I N G
Inventors
- 👤 William E Dillon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:01
CPC Classifications
B; B27; B27B; B27B17/00; B27B17/0033
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
153 words
In a portable tool of the type which is powered by an internal combustion engine, the improvement comprising: a. said tool including frame means; b. an internal combustion engine directly and rigidly mounted on said frame means whereby upon operation of said engine said frame means vibrates at a disturbing frequency W; c. a handle in the form of an elongated, flexible member, said handle being of unitary, homogeneous construction such that all portions of the handle vibrate together in unison; and d. first and second connection means respectively, connecting opposite ends of said handle member to said frame means with at least one end of said handle member being rigidly secured to said frame means bY said first connection means, said handle member, as a consequence of its material composition, of its shape and of the action of said first and second connection means, having a natural vibratory frequency Wn such that
Claim 2
Dependent Claim
153 words
In a portable tool of the type which is powered by an internal combustion engine, the improvement comprising: a. said tool including frame means; b. an internal combustion engine directly and rigidly mounted on said frame means whereby upon operation of said engine said frame means vibrates at a disturbing frequency W; c. a handle in the form of an elongated, flexible member, said handle being of unitary, homogeneous construction such that all portions of the handle vibrate together in unison; and d. first and second connection means respectively, connecting opposite ends of said handle member to said frame means with at least one end of said handle member being rigidly secured to said frame means bY said first connection means, said handle member, as a consequence of its material composition, of its shape and of the action of said first and second connection means, having a natural vibratory frequency Wn such that
Claim 3
Dependent Claim
29 words
The improvement according to claim 1 further defined by, stop means limiting the amount of relative movement between said frame means and said other end of the handle member.
Claim 4
Dependent Claim
26 words
The improvement according to claim 1 wherein the other end of the handle member is rigidly secured to said frame means by said second connection means.
Claim 5
Dependent Claim
14 words
The improvement according to claim 3 wherein said handle member is of one-piece construction.
Claim 6
Dependent Claim
103 words
The improvement according to claim 3 wherein said other end of the handle member is defined by first and second elongated elements with said first element being rigidly secured to said frame means and being substantially more flexible than said second element as a consequence of the shape of the former, the distal end of said second element being free to move relative to said frame means, and stop means mounted on said frame means and arranged to be engaged by said distal end of said second element thereby to limit the amount of relative movement between the latter and said frame means.
Claim 7
Dependent Claim
39 words
The improvement according to claim 3 wherein said handle member is defined by two end portions and another portion intermediate said end portions, said end portions being shaped so as to be substantially more flexible than said another portion.
Claim 8
Dependent Claim
115 words
In a portable tool of the type which is powered by an internal combustion engine, the improvement comprising: a. said tool including frame means; b. an internal combustion engine directly and rigidly mounted on said frame means whereby upon operation of said engine said frame means vibrates at a disturbing frequency W; c. a handle in the form of an elongated, homogeneous, flexible member; d. first and second connection means rigidly connecting respective opposite ends of said handle member to said frame means, said handle member, as a consequence of its material composition, of its shape and of the action of said first and second connection means, having a natural vibratory frequency Wn such that
Claim 9
Dependent Claim
115 words
In a portable tool of the type which is powered by an internal combustion engine, the improvement comprising: a. said tool including frame means; b. an internal combustion engine directly and rigidly mounted on said frame means whereby upon operation of said engine said frame means vibrates at a disturbing frequency W; c. a handle in the form of an elongated, homogeneous, flexible member; d. first and second connection means rigidly connecting respective opposite ends of said handle member to said frame means, said handle member, as a consequence of its material composition, of its shape and of the action of said first and second connection means, having a natural vibratory frequency Wn such that
Claim 10
Dependent Claim
115 words
In a portable tool of the type which is powered by an internal combustion engine, the improvement comprising: a. said tool including frame means; b. an internal combustion engine directly and rigidly mounted on said frame means whereby upon operation of said engine said frame means vibrates at a disturbing frequency W; c. a handle in the form of an elongated, homogeneous, flexible member; d. first and second connection means rigidly connecting respective opposite ends of said handle member to said frame means, said handle member, as a consequence of its material composition, of its shape and of the action of said first and second connection means, having a natural vibratory frequency Wn such that
Claim 11
Dependent Claim
115 words
In a portable tool of the type which is powered by an internal combustion engine, the improvement comprising: a. said tool including frame means; b. an internal combustion engine directly and rigidly mounted on said frame means whereby upon operation of said engine said frame means vibrates at a disturbing frequency W; c. a handle in the form of an elongated, homogeneous, flexible member; d. first and second connection means rigidly connecting respective opposite ends of said handle member to said frame means, said handle member, as a consequence of its material composition, of its shape and of the action of said first and second connection means, having a natural vibratory frequency Wn such that
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) | 1978-06-16 | 1978-12-16 | 1979-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-16 | 1982-12-16 | 1983-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-16 | 1986-12-16 | 1987-06-17 | $7700.00 | Window Closed / Lapsed |