Pneumatic locking swivel caster

Details Pneumatic locking swivel caster Pneumatic locking swivel caster

2006-03-28

2006-03-28

Glessner, Brian E. (Department: 3676)

Miscellaneous hardware (e.g., bushing, carpet fastener, caster,

Casters

Locked

C016S01800R, C016S019000, C016S039000, C188S001120, C280S011000

Reexamination Certificate

active

07017228

ABSTRACT:
A pneumatic locking swivel caster comprises a swivel caster and a locking device which may be activated by fluid pressure. The swivel caster may be a dual wheel swivel caster. An improved theatrical prop or scenery element comprises a pneumatic locking swivel caster and a control system. The control system may comprise a tank filled with pressurized air and a control valve. A pneumatic locking swivel caster may be locked into position by activating the control valve and pressuring the caster with air. The pneumatic locking swivel caster may comprise a triple swivel caster adapted such that all three sets of wheels are locked by air pressure.

REFERENCES:
patent: 3730307 (1973-05-01), Mitchell
patent: 4219186 (1980-08-01), Brewer
patent: 4679645 (1987-07-01), Galloway et al.
patent: 4722114 (1988-02-01), Neumann
patent: 4998320 (1991-03-01), Lange
patent: 5184373 (1993-02-01), Lange
patent: 5242035 (1993-09-01), Lange
patent: 5303450 (1994-04-01), Lange
patent: 5551715 (1996-09-01), Pickard
patent: 5774936 (1998-07-01), Vetter
patent: 6550101 (2003-04-01), Plate
patent: 6594951 (2003-07-01), Reynolds
patent: 407016029 (1995-01-01), None
“Triple Swivel Caster”, www.fasor.com/centerline/tri—swiv.html (last viewed Jul. 31, 2002).

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