Extrusion track for blinds

Details Extrusion track for blinds Extrusion track for blinds

1997-03-12

1998-12-15

Purol, David M.

Flexible or portable closure, partition, or panel

Plural strip, slat, or panel type

Venetian blind type

160900, E06B 930

Patent

active

058486330

ABSTRACT:
The improved system utilizes a track (51) which has a bowed internal surface to prevent the wheel of the carrier (17) from frictional engagement with the side of the track (51). The curved surface (55) which faces the wheels (27) will not be engaged by the wheels (27) even where the carrier (17) turns to one side or the other. This is accomplished while leaving the innermost portions of the raceway (53) in the same width position with regard to the wheels (27) as is usual to prevent the carrier (17) from coming off-track. The tolerances for the inner corners of the raceway (53) opposing the wheels (27) may be reduced to further prevent the possibility of jamming in the track (51).

REFERENCES:
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patent: 3068938 (1962-12-01), Hull
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patent: 4254813 (1981-03-01), Vecchiarelli
patent: 4291738 (1981-09-01), Grenga et al.
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patent: 4335775 (1982-06-01), Frentzel
patent: 4869309 (1989-09-01), Evans
patent: 4919185 (1990-04-01), Comeau et al.
patent: 4921031 (1990-05-01), Wagner et al.
patent: 5630457 (1997-05-01), Chou

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