Hoisting mechanism

Details Hoisting mechanism Hoisting mechanism

1986-05-12

1987-06-23

Bell, J. Karl

Tent, canopy, umbrella, or cane

Umbrella

Inflatable

A45B 1700

Patent

active

046745220

ABSTRACT:
An apparatus for pivoting a support at a joint connected to sections of a support rod. The joint includes an upper member provided with a narrow lower end portion having teeth around a curved surface which engage a threaded portion of a shaft rotatably mounted in a lower member of the joint. The rotatable shaft is provided at one end with a bevelled gear having teeth which engage teeth on a bevelled tooth drive wheel coaxially attached to a drive shaft so that the rotation of the drive shaft is transmitted through this assembly to cause the upper member of the joint to pivot.

REFERENCES:
patent: 2595697 (1952-05-01), Pereira
patent: 2863466 (1958-12-01), Small
patent: 2951492 (1960-09-01), Small
patent: 3145720 (1964-08-01), Torii
patent: 3182673 (1965-05-01), Small
patent: 3311119 (1967-03-01), Pearlstine
patent: 3419295 (1968-12-01), Small
patent: 3521651 (1970-07-01), Pearlstine

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