Spring loaded drop foot trailer jack

Implements or apparatus for applying pushing or pulling force – Vehicle attached jack – Screw actuated

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Details

254103, B60S 902

Patent

active

047968648

ABSTRACT:
An apparatus for adjustably supporting a portion of a wheeled vehicle, which apparatus may be retracted or disengaged from a supporting surface when the wheeled vehicle is put into use. A tubular outer housing is provided for attaching to the vehicle, with second and third tubular members slidably disposed therein. A locking mechanism is provided adjacent an aperture in a wall of the second tubular member for positioning a pin in selectively alignable apertures in a wall of the third tubular member, thereby preventing relative movement between the second and third tubular members. A tension spring engaging both second and third tubular members and located within the third tubular member is provided for biasing the third tubular member toward a retracted position with respect to the second tubular member. A cranking rod and threaded screw member are also disclosed for moving the second tubular member with respect to the tubular outer housing.

REFERENCES:
patent: 1394737 (1921-10-01), Keesler
patent: 2205436 (1940-06-01), Richards
patent: 2207548 (1940-07-01), Maranda
patent: 2565401 (1951-08-01), Smith
patent: 2939679 (1960-06-01), Ryan
patent: 3137512 (1964-06-01), Carpezzi
patent: 3281160 (1966-10-01), Vinther et al.
patent: 3366361 (1968-01-01), Gostling
patent: 3595527 (1971-07-01), Douglass
patent: 3873126 (1975-03-01), Hewett
patent: 4187733 (1980-02-01), Walther et al.
patent: 4316601 (1982-02-01), Osborne et al.
patent: 4684097 (1987-08-01), Cox

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