Joints and connections – Articulated members – Lockable at fixed position
Patent
1991-03-11
1993-04-06
Cuomo, Peter M.
Joints and connections
Articulated members
Lockable at fixed position
403109, 403328, 403378, 280655, 248333, F16B 712
Patent
active
051998114
ABSTRACT:
A telescopic construction includes a first tubular section provided with an axially extending slot and a guide seat having a central through hole and an inclined guide notch extending downward from a top side of the guide seat and communicated with the central through hole. The first tubular section extends into the central through hole such that an upper portion of the axially extending slot directly faces the inclined guide notch. A second tubular section is slidably disposed inside the first tubular section and has a radial hole aligned with the axially extending slot. A positioning member, disposed inside the second tubular section, has a stud biased to project through the radial hole and the axially extending slot. The stud engages the inclined guide notch and an upper end of the axially extending slot when the second tubular section is expanded from the first tubular section. Downward movement of the second tubular section relative to the first tubular section causes the inclined guide notch to push the stud into the radial hole to disengage the inclined guide notch, thereby retracting the second tubular section into the first tubular section.
REFERENCES:
patent: 3998476 (1976-12-01), Kazmark, Sr.
patent: 4618035 (1986-10-01), Mao
patent: 4896897 (1990-01-01), Wilhelm
Cuomo Peter M.
Kim Harry C.
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