Browse Prior Art Database

Combination Caster and Jack

IP.com Disclosure Number: IPCOM000046996D
Original Publication Date: 1983-Sep-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 2 page(s) / 54K

Publishing Venue

IBM

Related People

Berner, DM: AUTHOR [+3]

Abstract

A caster and jack are combined into a unitary assembly having a common rotary axis to allow selective floor engagement either by pivotal wheels or by a rigid, vibration-free mounting with adjustable leveling. The assembly is particularly useful in conjunction with instrument tables, copiers and other equipment requiring firm positioning once in a desired location but convenient movability between locations. The assembly avoids the problem of separate casters and leveling jacks that must permit adequate space so that the caster is clear to pivot 360 degrees, which requires displacement of either the caster or the jack from optimum corner locations under the machine frame. As shown in the partially sectioned view of Fig. 1, jack 10 is attached to upper machine frame 11 through adjustable shaft bearing 12.

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Combination Caster and Jack

A caster and jack are combined into a unitary assembly having a common rotary axis to allow selective floor engagement either by pivotal wheels or by a rigid, vibration-free mounting with adjustable leveling. The assembly is particularly useful in conjunction with instrument tables, copiers and other equipment requiring firm positioning once in a desired location but convenient movability between locations. The assembly avoids the problem of separate casters and leveling jacks that must permit adequate space so that the caster is clear to pivot 360 degrees, which requires displacement of either the caster or the jack from optimum corner locations under the machine frame. As shown in the partially sectioned view of Fig. 1, jack 10 is attached to upper machine frame 11 through adjustable shaft bearing 12. Threaded jack screw shaft 15 has a suitable drive element 16 on one end, such as a hexagonal nut adaptable for ratchet wrench drive. Shaft 15 is of appropriate length to permit convenient user access height and is formed in either a single piece or is universally jointed so that it is operable at a point not necessarily in line with the axis of caster swivel mount 20. The lower end of shaft 15 terminates in swivel foot pad 18 which, for instance, may have angular movement up to 15 degrees in any direction to accommodate an uneven floor 19. Cross pin 17 is incorporated into the side frame of caster wheel portion 20 so that swivel foot 18 is retracted in a position tilted away from wheel 22 for additional clearance...