Shoe with retractable spikes
AssigneeNone recorded
InventorDonald R. Mercer
Life of this patent
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AssigneeNone recorded
InventorDonald R. Mercer
Estimating the term…
A golf shoe has a sole and a heel attached to an upper. A spike is housed within a housing inserted into the sole or the heel. The housing includes a hollow cylinder threaded into the sole or heel. The cylinder houses a helical spring that biases a spike to the extended position. When the shoe is used on a hard surface, the surface forces the spike upward against the spring to a retracted position.
A shoe, comprising:
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
Studs or cleats for football or like boots: with resilient means, e.g. shock absorbing means
Non-skid devices or attachments: with outwardly-movable spikes
Fastenings or attachments of footwear
Term ended 21 Sep 2012 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
1. Field of the Invention
This invention relates in general to footwear. In particular, the invention relates to shoes having spikes, such as golf shoes.
2. Description of the Prior Art
FIG. 1 is a side view of a golf shoe including the retractable spikes of the invention.
FIG. 2 is an enlarged side elevation of a single spike assembly of the invention, with a portion of the golf shoe shown in dashed lines.
FIG. 3 is an enlarged sectional side view of one of the spike assemblies shown in FIG. 1, with the spike in the extended position.
The golf shoe 11 of the invention, shown in FIG. 1, has a sole 13 and a heel 15 attached to a standard golf shoe upper 17. A typical golf shoe 11 will have about six spike assemblies 19 in the sole 13 and about four additional spike assemblies 19 in the heel 15.
FIGS. 2-4 illustrate a single spike assembly 19 in greater detail. Each spike assembly 19 includes a housing 21, a spike 23, and a biasing means 25. Each housing 21 is a hollow cylinder 27, with a cap 29 on one end and a disc 31 on the other end. The cylinder 27 has external threads 33, so the spike assembly 19 can be threaded into a hole drilled in the sole 13 or heel 15 of the shoe 11.
The cylinder 27 and the cap 29 are preferably integral to one another, although, alternatively, the cap 29 could be friction f i t or threaded onto the cylinder 27. The cap 29 is attached to the upper end of the housing 21 and supports one end of the biasing means 25.