Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
191 words
A support comprising an elongated platform, an upright frame structure fixed to and rising from an inner end of said platform and providing an access passageway for the movement of workmen to and from the platform, suspending means secured to said inner end of the platform and rising from said passageway and adapted to be detachably connected to a mobile hoist for moving said platform to and from a position beneath and crosswise of the underside of a bridge, hanger means secured to and extending upwardly from said platform and adapted to be detachably secured to The frame structure of the bridge for supporting the platform therebeneath and with said passageway rising from one side of the bridge and accessible from the upper side of the bridge, cantilever means extending from said inner end of the platform for counterbalancing the weight of the platform and for causing the platform to swing upwardly to facilitate securement of said hanger means to the frame structure of the bridge, and means for adjusting said cantilever means for varying the counterbalancing affect thereof for causing the platform to be partially supported by said hanger means.
Claim 2
Dependent Claim
191 words
A support comprising an elongated platform, an upright frame structure fixed to and rising from an inner end of said platform and providing an access passageway for the movement of workmen to and from the platform, suspending means secured to said inner end of the platform and rising from said passageway and adapted to be detachably connected to a mobile hoist for moving said platform to and from a position beneath and crosswise of the underside of a bridge, hanger means secured to and extending upwardly from said platform and adapted to be detachably secured to The frame structure of the bridge for supporting the platform therebeneath and with said passageway rising from one side of the bridge and accessible from the upper side of the bridge, cantilever means extending from said inner end of the platform for counterbalancing the weight of the platform and for causing the platform to swing upwardly to facilitate securement of said hanger means to the frame structure of the bridge, and means for adjusting said cantilever means for varying the counterbalancing affect thereof for causing the platform to be partially supported by said hanger means.
Claim 3
Dependent Claim
47 words
A support as in claim 1, said cantilever means including a pair of rails extending from said inner end of the platform and disposed substantially parallel to the axis of the platform, and a counterweight supported for travel along said rails toward and away from the platform.
Claim 4
Dependent Claim
33 words
A support as in claim 2, and block and tackle means connected to said platform and rails and adapted to be manually actuated for moving the counterweight toward and away from the platform.
Claim 5
Dependent Claim
50 words
A support as in claim 1, said upright frame structure having an open inner side facing toward the other end of said platform and inwardly of the side of the bridge on which said passageway is disposed, and means of open-work construction closing the other three sides of said passageway.
Claim 6
Dependent Claim
25 words
A support as in claim 4, and a ladder disposed in said passageway to facilitate the movement of workmen therethrough to and from the platform.
Claim 7
Dependent Claim
21 words
A support as in claim 1, said platform including a frame and a deck secured to and supported on said frame.
Claim 8
Dependent Claim
57 words
A support as in claim 6, posts secured to and rising from the sides of said frame, and rails supported by upper ends of said posts and extending along the sides of the platform and across the other outer end thereof and disposed at a heighth to function as guardrails for protecting workmen standing on the platform.
Claim 9
Dependent Claim
20 words
A support in claim 7, and means of open-work construction enclosing the spaces between the rails, platform frame and posts.
Claim 10
Dependent Claim
46 words
A support as in claim 1, said hanger means comprising pairs of hook-like members, and means detachably securing said hook-like members of each pair together with the hook portions opening toward one another and engaging the bottom flange of an I-beam of the bridge frame structure.