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US 4,667,460 AGranted
Electric lawn mower with self coiling power cord
OwnerJoseph Kramerinventor
Life of this patent
Estimating the term…
Abstract
An electric lawn mower and power cord combination in which the power cord has a central portion that is self-coiling. This central portion of the cord comprises the predominant length of the cord, and is constructed with an elastic memory, so that, when in its relaxed state, it automatically coils itself into a continuous spiralling helix that is too large to pass under the electric lawn mower. A cord grip is also disclosed that locks the cord to a stationary object to prevent the cord from inadvertently becoming disconnected during use.
Claims4
A lawn mower and power cord combination comprising:
- a chassis for said mower, said chassis having a lower rim,
- wheels for supporting said rim above the ground by a dimension H,
- a power cord for said mower having a central portion formed into a spring helix construction and arranged to allow the cord to be pulled out to a relatively straight line and, when released, to spring back to the helix shape, and
- the diameter of the helix of said central portion being substantially greater than the dimension H;
- whereby movement of the rim of said chassis against said central portion lying on the ground ahead of said mower causes said rim to push away said cord.
2 more elements
Dependencies are inferred from the claim text.