Patent US3675786A successfully refreshed from Google Patents.
US3675786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Overhead cab crane control structure
Assignee: Individual
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Filing: 1970-12-21
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Granted: 1972-07-11
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Expires: 1990-12-21
Abstract
Abstract First and second carriages movable along respective rails have block and tackle supporting cables connected to drum mechanism and suspended therefrom to carry load and maintain operator cab level position. A platform is inside the operator cab and a bevel ring gear driven to be rotatable up to 180* in each of opposite directions carries the platform upon which operator control means are mounted. Fluid actuators and cab mounted fluid valves operatively associated therewith are effective for load holding and release with respect to cab control for operator safety. The cab itself is not allowed to turn because of the cable suspension and power lines to and from the cab.
Inventors
- 👤 Ray Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:24
CPC Classifications
B; B66; B66C; B66C13/00; B66C13/52; B66C13/54; B66C17/00; B66C2700/00; B66C2700/01
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
153 words
An overhead crane structure comprising: rail means supported in paired relationship to each other, first and second carriage means movable on said rail means, first and second windup drum mechanism journalled with respect to each carriage means, cable means individually secured to said first and second windup drum mechanism and each respectively adjustable in level establishing length relative to respective carriage means, an operator cab suspended by said cable means totalling at least three in number between one of said carriage means and said cab, a block and tackle means being carried by each cable means, a pair of crossed-arm tongs being suspended independently from one block and tackle means for load carrying therewith, fluid actuator means having cylinder and piston rod connection between arm ends operable for grasping and releasing load therefrom, and fluid operated clamping means extending laterally from said cab for load stabilization between said crossed-arm tongs and said cab.
Claim 2
Dependent Claim
153 words
An overhead crane structure comprising: rail means supported in paired relationship to each other, first and second carriage means movable on said rail means, first and second windup drum mechanism journalled with respect to each carriage means, cable means individually secured to said first and second windup drum mechanism and each respectively adjustable in level establishing length relative to respective carriage means, an operator cab suspended by said cable means totalling at least three in number between one of said carriage means and said cab, a block and tackle means being carried by each cable means, a pair of crossed-arm tongs being suspended independently from one block and tackle means for load carrying therewith, fluid actuator means having cylinder and piston rod connection between arm ends operable for grasping and releasing load therefrom, and fluid operated clamping means extending laterally from said cab for load stabilization between said crossed-arm tongs and said cab.
Claim 3
Dependent Claim
50 words
An overhead crane structure according to claim 1, in which said fluid operated clamping means are in a lower corner location of said cab, and additional fluid actuator means with cylinder and piston rod connection provide for load stabilization relative to said first mentioned actuator means between said crossed-arm tongs.
Claim 4
Dependent Claim
27 words
An overhead crane structure according to claim 2, in which flanges projecting laterally from said cab provide pivotal connection for both first and second additional actuator means.
Claim 5
Dependent Claim
34 words
An overhead crane structure according to claim 2, in which fluid valves are mounted in said cab in a position accessible from said platform and operable at least for actuation of said clamping means.
Claim 6
Dependent Claim
22 words
An overhead crane structure according to claim 4, in which a pressurized fluid source is cab mounted next to said clamping means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |