Implements or apparatus for applying pushing or pulling force – Single throw lever – Lazy tongs
Patent
1977-06-10
1978-09-19
Makay, Albert J.
Implements or apparatus for applying pushing or pulling force
Single throw lever
Lazy tongs
214512, 187 18, B60P 102
Patent
active
041148541
ABSTRACT:
A lift with a work platform supported by a scissors linkage on a base includes a single hydraulic cylinder for elevating the linkage. The cylinder is connected between a lower link and a swing arm which is pivotally connected to the linkage. During a first lifting stage the swing arm bears against a cam surface on the uppermost link to cause an initial unfolding action of the upper links. Prior to the arm leaving the cam surface, the arm bears against an abutment on one of the lower links for a second lifting stage to cause unfolding of the linkage from the bottom. This arrangement provides a strong, smooth unfolding of the linkage. The base is provided with outriggers which can be folded against the sides of the base when not in use and which are pivoted to a transverse position for use. Links connecting the outriggers to a guide track enable positive locking of the outriggers in the operative position.
REFERENCES:
patent: 2533980 (1950-12-01), Weaver
patent: 3664459 (1972-05-01), Stephens et al.
Makay Albert J.
Pac-Craft Products, Inc.
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