Internal-combustion engines – Accessories – Covers – trays – vibrators – corrosion inhibitors – air filters
Patent
1988-09-30
1989-06-27
Argenbright, Tony M.
Internal-combustion engines
Accessories
Covers, trays, vibrators, corrosion inhibitors, air filters
30276, 56 127, B26D 1553
Patent
active
048419290
ABSTRACT:
A gasoline engine driven flexible line trimmer is provided with a modularly constructed power head section which significantly facilitates the original manufacturing assembly, and subsequent service disassembly, of the power head. In a clutch drive embodiment thereof, the power head has four readily separable modules--an engine module comprising a main engine shroud to which the engine is internally secured; a fan housing module; a starter module comprising a starter housing and a recoil starter mechanism retained therein; and a coupling module comprising a clutch housing carrying therein structure for operatively interconnecting the engine's clutch to the flexible drive shaft disposed within the trimmer shaft. In a direct drive version thereof, the power head has two separable modules--the engine module and a combined fan housing, starter and coupling module defined by a single housing within which the starter and coupling structure is carried. Pull rope installation in the starter mechanism is facilitated and made safer by pulley locking and retaining structure incorporated in the starter module, and improved air filter element sealing is provided by virtue of a specially designed air filter housing and choke plate assembly associated with the carburetor. Shaft vibration transmitted to the trimmer user through the supporting shoulder strap structure is significantly reduced by a specially designed resilient strap connector assembly securable to the trimmer shaft.
REFERENCES:
patent: 4179805 (1979-12-01), Yamada
patent: 4266515 (1981-05-01), Bross
patent: 4286675 (1981-09-01), Tuggle
patent: 4733471 (1988-03-01), Rahe
Consumer Reports, Jun. 1988, vol. 54, No. 6, "String Trimmers", pp. 406-411.
1986 Ryan Lawn Care Products, "Owner and Service Manual", models 265, 285.
Sadler Jeffery G.
Tuggle Lloyd H.
Argenbright Tony M.
Carlberg Eric R.
White Consolidated Industries, Inc.
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