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US3841425A Expired / Lapsed US ⏱️ 0.0 years remaining

Controlled vibration absorbing mounting for engines

Assignee: Briggs and Stratton Corp
•
Filing: 1973-10-26
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Granted: 1974-10-15
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Expires: 1993-10-26
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Abstract

Abstract A riding power lawn mower powered by a vertical shaft single cylinder engine that is mounted on the frame of the implement by conventional soft mounts and is connected with the implement frame by resiliently flexible metal strips that have edgewise stiffness and flatwise flexibility to restrain the engine from lateral displacement while leaving it free to move vertically to the extent the soft mounts provide such freedom.

Inventors

  • 👤 J Harkness

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-06 04:34
CPC Classifications
A; A01; A01D; A01D34/00; A01D34/01; A01D34/412; A01D34/63; A01D34/64; F; F02; F02B; F02B75/00; F02B75/16; A01D2101/00

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 252 words
In combination with an implement such as a power lawN mower, garden tractor or the like having a frame with a generally horizontal portion, and a vertical shaft engine which provides power for the implement, the engine having a base with spaced apart mounting spots on its bottom, and having its crankshaft projecting downwardly with power take-off means thereon, vibration absorbing means mounting the engine on said generally horizontal portion of the frame of the implement, comprising: A. a soft mount connecting each of the spaced apart mounting spots of the engine base with said generally horizontal portion of the implement; B. a plurality of resiliently flexible strips each rigidly connected at one end to the engine base and projecting therefrom in spaced substantially parallel relationship to said generally horizontal portion of the implement frame; and C. means rigidly anchoring each of said resiliently flexible strips at a distance from its connection with the engine, to said implement frame, said resiliently flexible strips being elongated and substantially flat and having greater width than thickness so that they have edgewise stiffness and flatwise flexibility, and said strips having their major surfaces facing upward and downward so that said strips restrain lateral displacement of the engine with respect to the implement frame but leave the engine free to move vertically to the extent the soft mounts provide for such movement, whereby the location of the power take-off means with respect to the implement is not objectionably altered by the permitted movement of the engine.
Claim 2
Dependent Claim 252 words
In combination with an implement such as a power lawN mower, garden tractor or the like having a frame with a generally horizontal portion, and a vertical shaft engine which provides power for the implement, the engine having a base with spaced apart mounting spots on its bottom, and having its crankshaft projecting downwardly with power take-off means thereon, vibration absorbing means mounting the engine on said generally horizontal portion of the frame of the implement, comprising: A. a soft mount connecting each of the spaced apart mounting spots of the engine base with said generally horizontal portion of the implement; B. a plurality of resiliently flexible strips each rigidly connected at one end to the engine base and projecting therefrom in spaced substantially parallel relationship to said generally horizontal portion of the implement frame; and C. means rigidly anchoring each of said resiliently flexible strips at a distance from its connection with the engine, to said implement frame, said resiliently flexible strips being elongated and substantially flat and having greater width than thickness so that they have edgewise stiffness and flatwise flexibility, and said strips having their major surfaces facing upward and downward so that said strips restrain lateral displacement of the engine with respect to the implement frame but leave the engine free to move vertically to the extent the soft mounts provide for such movement, whereby the location of the power take-off means with respect to the implement is not objectionably altered by the permitted movement of the engine.
Claim 3
Dependent Claim 25 words
The invention defined by claim 1, further characterized in that said resiliently flexible strips are spaced above said generally horizontal portion of the implement frame.
Claim 4
Dependent Claim 56 words
The invention defined by claim 1, wherein the anchorage of each of said resiliently flexible strips comprises: 1 a rigid spacer between the strip and the adjacent part of said implement frame; and 2 fastening means passing through said spacer and clamping the same between the resiliently flexible strip and said part of the implement frame.
Claim 5
Dependent Claim 41 words
The invention defined by claim 1, wherein there is one resiliently flexible strip for each of the spaced apart mounting spots of the engine base; and wherein the connections of said strips to the engine are located at said mounting spots.
Claim 6
Dependent Claim 45 words
The invention defined by claim 4, wherein there are four mounting spots on the engine base, and wherein said resiliently flexible strips extend from the engine towards the opposite sides of said generally horizontal portion of the frame and are generally parallel with one another.
Claim 7
Dependent Claim 66 words
The invention defined by claim 1, wherein there are four mounting spots on the engine base, wherein the resiliently flexible strips that are connected to two adjacent mounting spots are oppositely projecting arms of a unitary member, and wherein each of said unitary members is anchored to the implement frame at a single point between the two adjacent mounting spots to which its arms are secured.
Claim 8
Dependent Claim 14 words
The invention defined by claim 1, wherein said resiliently flexible strips are of metal.

References Cited (Backward Citations)

US1815170A Cited
US1976701A Cited
US2055279A Cited
US3236326A Cited
US3402782A Cited
US3429533A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-10-14 1978-04-15 1978-10-15 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-10-14 1982-04-15 1982-10-15 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-10-14 1986-04-15 1986-10-15 $7700.00 Window Closed / Lapsed

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