Land vehicles – Ski or skate appliance or attachment – Ski pole
Patent
1995-06-23
1997-07-29
Johnson, Brian L.
Land vehicles
Ski or skate appliance or attachment
Ski pole
135 75, A63C 1122
Patent
active
056515650
ABSTRACT:
A locking structure for two telescoping tubular members is provided with an outer tube member and an inner tube member slidable inside the outer tube member. An expansion member is located within the outer tube member. The expansion member contains at least two tapered members each having innermost and outermost portions, the outermost portions being spaced no more than 1/2 inch from each other. On the expansion member is an outer tube pressure member shaped to fit the expansion to member and disposed between said the expansion member and the inner surface of the outer tube member. The expansion member may be attached to the inner tube member. The expansion member is moved in opposite directions inside the outer tube member so that when said expansion member is moved in a first direction, pressure is directly applied to the outer tube pressure member which in turn applies pressure to the inner surface of the outer tube member thereby maintaining the inner and outer tube members in a locked position. When the expansion member is moved in the opposite direction, pressure is relieved from the outer tube pressure member which in turn relieves the pressure exerted on the inner surface of the outer tube member thereby loosening the inner and outer tube members from their previously locked or tightened position.
REFERENCES:
patent: 2275330 (1942-03-01), Tueten
patent: 2456205 (1948-12-01), Magder
patent: 2494878 (1950-01-01), Jensen
patent: 4134703 (1979-01-01), Hinners
patent: 5139284 (1992-08-01), Ronning et al.
patent: 5387048 (1995-02-01), Kuo
patent: 5538354 (1996-07-01), Simond
Johnson Brian L.
Life-Link International, Inc.
Maslow Andrew D.
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