Nova Patents
US2586531A

Wheeled support having ladder assembly

Abstract

This record has no abstract on file.

US2586531A, drawing sheet 1
Sheet 1 of 7

Term

Term ended

Expired 19 February 1969, 57.6 years ago.

  1. Priority and filed
  2. Granted
  3. Expired
  4. Today

7 claims: 7 independent, 0 dependent

  1. 1
    0 Having thus described my invention, I claim:1. The combination with a wheeled support, of a rear supporting device mounted upon the wheeled support, ladder casings having their rear ends pivotally mounted upon the supporting de- 5 vice so that the ladder casings swing substantially vertically, a forward supporting device mounted upon the wheeled support, tubular tracks haying their forward ends pivotally mounted upon the forward supporting device to 0 swing substantially vertically, the forward supporting device also supporting the ladder casings when shifted to the substantially horizontal position, carriages pivotally mounted upon the ladder casings forwardly of their rear ends and operat5 ing within the tubular tracks, a ladder having rails longitudinally adjustably mounted within the ladder casings, and a member carried by the wheeled support and having pockets to receive the ends of the ladder rails when such rails are 0 substantially vertically arranged.
  2. 2
    The combination with a wheeled support, of a supporting device mounted upon the support, ladder casings pivotally mounted upon the device to swing substantially vertically, a second sup- .5 porting device mounted upon the wheeled support, tubular tracks pivotally mounted upon the second supporting device to swing substantially vertically, said tubular tracks having longitudinal slots, carriages pivotally mounted upon the 0 ladder casings and operating within the tubular tracks and having parts extending through the slots, a ladder hawing rails mounted within the ladder casings to move longitudinally therein, a member carried by the wheeled support and having pockets to receive the ends of the ladder rails when the ladder rails are shifted to a substantially vertical position, and means to lock the ladder casings with the tubular rails.
  3. 3
    The combination with a wheeled support, 10 of a rear substantially horizontal supporting member mounted upon the wheeled support, pivoted ladder casings mounted upon the substantially horizontal supporting member, a second substantially horizontal supporting member *5 mounted upon the wheeled support, swinging tubular tracks pivoted upon the second substantially horizontal supporting member and having longitudinal slots, carriages mounted within the tubular tracks, wheels secured to the carriages, studs attached to the carriages and extending through the ’ longitudinal slots and pivotally mounted upon the ladder casings, a ladder having rails longitudinally movably mounted within the ladder casings, a member carried by the wheeled support and having parts for detachable inter2,586,531 s locking engagement with the lower ends of the ladder rails when such rails are in the raised position, and releasable means to hold each carriage against movement in one direction within its tubular track, the ladder casings having their ends resting upon the second substantially horizontal supporting member when the ladder casings are in the lowered position.
  4. 4
    The combination with a wheeled support, of a rear supporting device mounted upon the wheeled support, ladder casings pivotally mounted upon the rear supporting device for substantially vertical swinging movement to upright and lowered positions, a ladder including side rails longitudinally movably mounted within the ladder casings and swingable with the casings to the upright and lowered positions, a forward supporting device mounted upon the wheeled support, tracks pivotally mounted upon the forward supporting device for substantially vertical swinging movement, the tracks being arranged laterally outwardly of the ladder casings so that the casings may pass between the tracks during the raising and lowering of the ladder, and carriages carried by the ladder casings forwardly of their pivotal connection with the rear supporting device and engaging the tracks to travel longitudinally thereof.
  5. 5
    A portable ladder assembly comprising a wheeled support including forward and rear spaced supporting structures, ladder casings pivotally connected near their rear ends to the rear supporting structure and adapted to swing substantially vertically to upright and lowered substantially horizontal positions, tracks pivotally connected near their forward ends to the forward supporting structure and swingable substantially vertically and disposed laterally outwardly of the ladder casings so that the casings may pass between the tracks, follower elements secured to the ladder casings forwardly of their pivotal connection with the rear supporting structure and engaging the tracks to travel longitudinally thereof, and a ladder including side rails longitudinally movably mounted within the ladder casings and swingable with the same to the upright and lowered positions, the ladder casings passing between and extending longitudinally of the tracks in laterally opposed relation when in the lowered substantially horizontal position and then resting upon the forward supporting structure.
  6. 6
    The combination with a wheeled support, of a rear supporting device mounted upon the wheeled support, ladder casings pivotally secured to the rear supporting device for substantially vertical swinging movement, a forward supporting device mounted upon the wheeled support, tubular tracks pivotally secured to the forward supporting device to swing substantially vertically, the forward supporting device also serving to support the ladder casings when they are swung to a lowered substantially horizontal position, carriages pivotally mounted upon the ladder casings forwardly of the rear ends of the same and operating within the tubular tracks, a ladder having side rails longitudinally movably mounted within the ladder casings, and means carried by the wheeled support for releasably holding the lower ends of the ladder rails when such rails are in an upright position.
  7. 7
    The combination with a wheeled support, of a rear supporting device mounted upon the wheeled support, ladder casings pivotally mounted upon the rear supporting device for substantially vertical swinging movement to raised and lowered positions, a forward supporting device mounted upon the wheeled support, tubular tracks pivotally mounted upon the forward supporting device to swing substantially vertically and having opposed longitudinal slots, carriages mounted within the tubular tracks for movement longitudinally thereof, studs secured to the carriages and extending through the longitudinal slots and pivotally secured to the ladder casings, a ladder having side rails longitudinally movably mounted within the ladder casings, and means carried by the wheeled support for engaging the side rails of the ladder near their lower ends and releasably holding the ladder in a generally vertical raised position, the ladder casings resting on the forward supporting device when the ladder is swung to the lowered substantially horizontal position. DONALD L. GORDON. REFERENCES CITED The following references are of record in the file of this patent:UNITED STATES PATENTS Number Name Date 281,977 Coons_____________July 24, 1883 2,035,537 Cowan et al_________Mar. 31,1936 2,186,119 Moen_______________Jan. 9, 1940 2,245,481 Kiley et al.________June 10, 1941
Independent claims7