Patrick L Mccartney

US Patent:

6357077, Mar 19, 2002

Filed:

Oct 14, 2000

Appl. No.:

09/687872

Inventors:

Patrick L. McCartney - Seven Mile OH

Assignee:

Hamilton Caster Mfg. Co. - Hamilton OH

International Classification:

B60B 3300

US Classification:

16 44, 16 35 D

Abstract:

A spring loaded caster includes a support plate adapted to be affixed to the underside of an article to be transported. Two caster legs depend downwardly from the support plate. The caster legs are spaced apart and preferably substantially parallel with each other. Each of the caster legs includes an elongated slot for receiving an axle. A pair of spring brackets is provided that are of a generally L-shaped or U-shaped configuration and are disposed on an outer surface of a corresponding caster leg. The spring bracket may include wear plates. A spring sleeves is disposed on an underside of one leg of the spring brackets. Additionally, two or more spring block including an axle receiving segment that includes a passage for receiving an axle therethrough are provided. On each spring block, a spring is held in place by a spring pin and is received in a corresponding spring sleeve. A wheel is provided in the space between the caster blade and an axle that holds the various parts components together is threaded through the spring block assemblies, caster legs, and the wheel.

US Patent:

20190077192, Mar 14, 2019

Filed:

Sep 8, 2017

Appl. No.:

15/699280

Inventors:

- Hamilton OH, US
Patrick L. McCartney - Fairfield OH, US

International Classification:

B60B 33/00

Abstract:

A dual wheel swivel caster includes a swivel assembly, a horn, a rig hub, a solid axle, at least one ring of roller bearings, first and second wheel assemblies, and at least one ring of bearings. The first wheel assembly has a first wheel axis, and includes an annular plate element. The torque limiter is configured to rotatably couple the first and second wheel assemblies with the solid axle when the torque between the annular plate element and the torque limiter is below a preset value. The torque limiter is configured to rotatably decouple the first wheel assembly from the solid axle and the second wheel assembly when the torque exceeds the preset value. The ring of bearings is configured to allow the first wheel assembly to rotate independently of the solid axle and the second wheel assembly about the rotational axis when the torque exceeds the preset value.