| US 7,544,902 B2 | ||
| Mechanical lift measurement system | ||
| Frantz D. Stanford, Madison, Wis. (US) | ||
| Assigned to Actuant Corporation, Glendale, Wis. (US) | ||
| Appl. No. 10/549,716 PCT Filed Mar. 26, 2004, PCT No. PCT/US2004/009436 § 371(c)(1), (2), (4) Date Jun. 26, 2006, PCT Pub. No. WO2004/088134, PCT Pub. Date Oct. 14, 2004. |
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| Claims priority of provisional application 60/458987, filed on Mar. 28, 2003. | ||
| Prior Publication US 2007/0034420 A1, Feb. 15, 2007 | ||
| Int. Cl. G01G 19/00 (2006.01); G01G 23/20 (2006.01); G01C 5/04 (2006.01) | ||
| U.S. Cl. 177—146 [177/173; 116/205; 116/283; 116/334; 187/394; 254/1; 254/89 H; 33/333; 33/367; 33/832] | 14 Claims |
| 1. A lift measurement system for determining a position of a load during a lift operation including a stationary cylinder
and an associated piston that is extendable and retractable with respect to the cylinder at a load support zone of the load
to correspondingly raise and lower the load, the system comprising:
a display including a scale and enclosing an indicator that is movable with respect to the scale; and
a linkage operatively coupled at one end to the load support zone, and connected at a second end to the display, wherein the
linkage transfers movement of the load at the load support zone to the indicator to move the indicator relative to the scale;
wherein the linkage comprises a cable assembly having a proximal end attached to the load and a distal end attached to the
indicator;
wherein the cable assembly further comprises a cable member connected between the load and the indicator;
wherein the cable member is surrounded by a stationary sleeve;
wherein the stationary sleeve is connected at one end to the cylinder, and at a second end to the display; and
wherein the stationary sleeve is connected to the cylinder via a bracket attached to the cylinder.
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