US3637029A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hand-held power tool with antivibration mount
Assignee: Textron Inc
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Filing: 1970-09-14
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Granted: 1972-01-25
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Expires: 1990-09-14
Abstract
Abstract A hand-held power tool comprises an internal combustion engine on which a power tool is mounted and by which it is driven. The engine is mounted by vibration isolators on an essentially rigid supporting structure comprising a base portion, a front handle and a rear handle. Four vibration isolators are so arranged as to isolate the supporting structure from vibration of the engine while providing effective control of the tool by an operator holding the supporting structure by the front and rear handles. The vibration isolators are shown in the form of hollow barrelshaped bodies of elastomeric material.
Inventors
- 👤 Noble P Sherwood Jr
- 👤 James P Strickland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:28
CPC Classifications
B; B27; B27B; B27B17/00; B27B17/0033; F; F16; F16F; F16F1/00; F16F1/36; F16F1/373; F16F1/3732
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
121 words
An engine-driven hand-held power tool comprising an engine having a front portion and a rear portion, a tool mounted on and driven by said engine, an engine-supporting structure comprising a base portion, a front handle and a rear handle, said base portion and handles constituting a unitary essentially rigid structure, and means mounting said engine on said supporting structure comprising three vibration isolators supporting the front portion of said engine on said supporting structure and a fourth vibration isolator supporting the rear portion of said engine on said supporting structure, said vibration isolators being arranged to isolate said supporting structure from vibration of said engine while providing control of said tool by an operator holding said supporting structure by said handles.
Claim 2
Dependent Claim
121 words
An engine-driven hand-held power tool comprising an engine having a front portion and a rear portion, a tool mounted on and driven by said engine, an engine-supporting structure comprising a base portion, a front handle and a rear handle, said base portion and handles constituting a unitary essentially rigid structure, and means mounting said engine on said supporting structure comprising three vibration isolators supporting the front portion of said engine on said supporting structure and a fourth vibration isolator supporting the rear portion of said engine on said supporting structure, said vibration isolators being arranged to isolate said supporting structure from vibration of said engine while providing control of said tool by an operator holding said supporting structure by said handles.
Claim 3
Dependent Claim
34 words
An engine-driven hand-held power tool according to claim 1, in which each of said isolators is stiffer in the direction of a central axis and more yielding in a direction perpendicular to said axis.
Claim 4
Dependent Claim
49 words
An engine-driven hand-held power tool according to claim 2, in which said isolator supporting the rear portion of the engine and at least one of the isolators supporting the front portion of the engine have their said axes approximately vertical in a normal operating position of said power tool.
Claim 5
Dependent Claim
26 words
An engine-driven hand-held power tool according to claim 3, in which two of said isolators supporting the front portion of said engine have said axis horizontal.
Claim 6
Dependent Claim
124 words
An engine-driven hand-held power tool comprising an engine having a front portion and a rear portion, an operating tool mounted on and driven by said engine, an engine-supporting structure comprising a front handle, a rear handle and a connecting portion, said handles and connecting portion constituting a unitary essentially riGid structure, and means mounting said engine on said supporting structure comprising a plurality of vibration isolators and associated mounting means on said supporting structure and said engine respectively, each of said isolators comprising a hollow barrel-shaped body of elastomeric material having opposite ends and an annular circumferential groove between said ends, said mounting means comprising respectively a support having portions engaging opposite ends of said isolator and a ring received in said annular groove.
Claim 7
Dependent Claim
124 words
An engine-driven hand-held power tool comprising an engine having a front portion and a rear portion, an operating tool mounted on and driven by said engine, an engine-supporting structure comprising a front handle, a rear handle and a connecting portion, said handles and connecting portion constituting a unitary essentially riGid structure, and means mounting said engine on said supporting structure comprising a plurality of vibration isolators and associated mounting means on said supporting structure and said engine respectively, each of said isolators comprising a hollow barrel-shaped body of elastomeric material having opposite ends and an annular circumferential groove between said ends, said mounting means comprising respectively a support having portions engaging opposite ends of said isolator and a ring received in said annular groove.
Claim 8
Dependent Claim
26 words
An engine-driven hand-held power tool according to claim 5, in which at least the exposed outer surface of said elastomeric material is resistant to fluid hydrocarbons.
Claim 9
Dependent Claim
31 words
An engine-driven hand-held power tool according to claim 5, in which said elastomeric body is in a compressed condition between said portions of the support engaging opposite ends of said body.
Claim 10
Dependent Claim
31 words
An engine-driven hand-held power tool according to claim 5, in which a pin connecting said portions engaging opposite ends of said body extends axially through said body and through said ring.
Claim 11
Dependent Claim
114 words
An engine-driven hand-held power tool according to claim 5, in which said engine has a crankshaft arranged horizontally and transversely and a cylinder arranged with a central axis extending in an approximately fore-and-aft direction, and in which said mounting means comprises three of said isolators at the front portion of the engine and a fourth said isolator at the rear portion of the engine, two of said isolators at the front portion of the engine being arranged with central axes approximately parallel to said crankshaft, and the third said isolator at the front portion of the engine and said isolator at the rear portion of the engine being arranged with central axes approximately vertical.
Claim 12
Dependent Claim
23 words
An engine-driven hand-held power tool according to claim 5, in which said elastomeric material has a durometer value of between 35 and 55.
Claim 13
Dependent Claim
23 words
An engine-driven hand-held power tool according to claim 10, in which the durometer value of said elastomeric material is between 40 and 45.
Claim 14
Dependent Claim
42 words
An engine-driven hand-held power tool according to claim 5, in which said mounting means comprises three of said isolators supporting the front portion of the engine and a fourth said isolator supporting the rear portion of said engine on said supporting structure.
Claim 15
Dependent Claim
42 words
An engine-driven hand-held power tool according to claim 12, in which said isolator at the rear portion of the engine and one of said isolators at the front portion of the engine are arranged with a central axis of the isolator vertical.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-24 | 1975-07-26 | 1976-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-24 | 1979-07-26 | 1980-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-24 | 1983-07-26 | 1984-01-25 | $7700.00 | Window Closed / Lapsed |