Patent US3774379A successfully refreshed from Google Patents.
US3774379A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lawn mower
Assignee: Panasonic Electric Works Co Ltd
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Filing: 1972-09-20
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Granted: 1973-11-27
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Expires: 1992-09-20
Abstract
Abstract A lawn mower comprises a motor-driven lawn mower body having a holding part for user''s manual handling and a caster body having two branched arms to which the holding part of mower body is detachably coupled so as to allow the user to handle the lawn mower readily in either way of using the mower body alone separately or with the caster body. Fixed blade in the mower body is secured to a fixing plate of a plastics fixed to the mower body containing the motor and movable blade has a resilient clutch means for breaking connection with drive power transmitting means upon application of reverse directional load to the movable blade.
Inventors
- 👤 S Mizobata
- 👤 Y Kawano
- 👤 M Matsumoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:24
CPC Classifications
A; A01; A01D; A01D34/00; A01D34/01; A01D34/412; A01D34/63; A01D2101/00
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
151 words
An electric power mower suitable for both hand-held and caster-mounted operation, comprising: A. a caster assembly, including 1. a base, 2. a pair of forked arms branching outwardly of said base, 3. three supporting wheels carried respectively by said base and by each of said arms, 4. an elongated handle pivotably connected to said base, and 5. first mounting means carried by said base, and B. a detachable mower assembly including 1. a generally cylindrical lawn mower body positionable between said forked arms, said body including a fixed blade carried by said body, an electric motor rotable longitudinally of said body, and a rotatable blade coupled to said motor, 2. a short handle extending radially from said body, and 3. second mounting means carried by said short handle, said second mounting means being detachably coupleable to said first mounting means to thereby couple said detachable mower assembly onto said caster assembly.
Claim 2
Dependent Claim
151 words
An electric power mower suitable for both hand-held and caster-mounted operation, comprising: A. a caster assembly, including 1. a base, 2. a pair of forked arms branching outwardly of said base, 3. three supporting wheels carried respectively by said base and by each of said arms, 4. an elongated handle pivotably connected to said base, and 5. first mounting means carried by said base, and B. a detachable mower assembly including 1. a generally cylindrical lawn mower body positionable between said forked arms, said body including a fixed blade carried by said body, an electric motor rotable longitudinally of said body, and a rotatable blade coupled to said motor, 2. a short handle extending radially from said body, and 3. second mounting means carried by said short handle, said second mounting means being detachably coupleable to said first mounting means to thereby couple said detachable mower assembly onto said caster assembly.
Claim 3
Dependent Claim
10 words
a pair of forked arms branching outwardly of said base,
Claim 4
Dependent Claim
10 words
a pair of forked arms branching outwardly of said base,
Claim 5
Dependent Claim
9 words
a short handle extending radially from said body, and
Claim 6
Dependent Claim
9 words
a short handle extending radially from said body, and
Claim 7
Dependent Claim
55 words
A lawn mower according to claim 1 wherein said fixed blade is in close contact with a mounting plate made of a plastic, said mounting plate being secured to a stationary shaft positioned vertically within the lawn mower body, and spring means for urging said rotary blade onto the upper surface of the fixed blade.
Claim 8
Dependent Claim
38 words
A lawn mower according to claim 1 wherein said movable blade and said motor are connected with each other through a clutch means which is capable of disengagement upon application of reverse directional load to the rotary blade.
Claim 9
Dependent Claim
31 words
second mounting means carried by said short handle, said second mounting means being detachably coupleable to said first mounting means to thereby couple said detachable mower assembly onto said caster assembly.
Claim 10
Dependent Claim
31 words
second mounting means carried by said short handle, said second mounting means being detachably coupleable to said first mounting means to thereby couple said detachable mower assembly onto said caster assembly.
Claim 11
Dependent Claim
14 words
three supporting wheels carried respectively by said base and by each of said arms,
Claim 12
Dependent Claim
14 words
three supporting wheels carried respectively by said base and by each of said arms,
Claim 13
Dependent Claim
9 words
an elongated handle pivotably connected to said base, and
Claim 14
Dependent Claim
9 words
an elongated handle pivotably connected to said base, and
Claim 15
Dependent Claim
14 words
first mounting means carried by said base, and B. a detachable mower assembly including
Claim 16
Dependent Claim
14 words
first mounting means carried by said base, and B. a detachable mower assembly including
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) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |