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US 5,720,474 AGranted
Shock absorbing mechanism of displacement for stick, leg, etc.
OwnerKazuo Sugiyamainventor
Life of this patent
Estimating the term…
Abstract
This invention intends to provide a shock absorbing mechanism for displacement for a stick, an artificial leg etc such as a walking stick, a crutch, a stick for sports, an artificial leg, a walking tool for a patient, a chair, or a protecting bed, in which elastic materials having several different moduli of elasticity are built in a small space of a compression coil spring, and accomplish an elastic sticky force like a human muscle which is light and low in cost.
Claims9
A shock absorbing mechanism for displacement for a stick, an artificial leg and the like comprising;
- an outer sleeve (1);
- and an inner sleeve (2), a compression coil spring (7) inserted between said outer sleeve (1) and inner sleeve (2);
- a plurality of elastic materials (8) of rubber or plastic inserted within said compression coil spring 7;
- a pair of airtight rings (9) inserted above an upper end (2a) of said inner sleeve (2);
- a partition plate (10) inserted between respective inner ends (1a and 2a) of said outer sleeve (1) and inner sleeve (2);
- said compression coil spring (7) with said elastic materials (8) being inserted between said airtight ring (9) and said partition plate (10);
- said elastic materials (8) being different in hardness to each other.
4 more elements
A shock absorbing mechanism for a walking stick, crutch or the like comprising;
- an outer sleeve (1);
- an inner sleeve (2) slidably fitting into said outer sleeve (1);
- a compressible coil spring (7) fitting inside said outer sleeve above an end of said inner sleeve;
- one or more resilient inserts (8) inside said compressible coil spring (7);
- a partitioning plate (10) partitioning a space between said compressible coil spring (7) and an end of said outer sleeve;
- at least one resilient elastic insert (8) between said partitioning plate (10) and said end of said outer sleeve (1);
- and one or more airtight resilient rings (9) between an inner end of said inner sleeve (2) and said compressible spring (7);
- said compressible coil spring (7) and said one or more resilient inserts (8) being compressed when said inner sleeve (2) slides in said outer sleeve (1).
5 more elements
Dependencies are inferred from the claim text.