초록 ▼

A tripod (1) for the support of apparatus in general and, in particular, of optical or photographic apparatus and the like is described and comprises a spider (3) in which a plurality of legs (2) converge and a pillar (12) arranged to receive the apparatus and having a stem (11) housed in a seat (4)

A tripod (1) for the support of apparatus in general and, in particular, of optical or photographic apparatus and the like is described and comprises a spider (3) in which a plurality of legs (2) converge and a pillar (12) arranged to receive the apparatus and having a stem (11) housed in a seat (4) of the spider, the seat extending through a pivotably adjustable element ( 21) of an articulated joint (22) formed in the spider.

대표청구항 ▼

What is claimed is: 1. A tripod for the support of apparatus comprising a spider (3) in which a plurality of legs (2) converge and a pillar (12) arranged to receive the apparatus and having a stem (11 ) housed in a seat (4) of the spider, said pillar ( 12) being slidable axially in an adjustable ma

What is claimed is: 1. A tripod for the support of apparatus comprising a spider (3) in which a plurality of legs (2) converge and a pillar (12) arranged to receive the apparatus and having a stem (11 ) housed in a seat (4) of the spider, said pillar ( 12) being slidable axially in an adjustable manner in the seat and the seat extending through an orientable element (21) of an articulated joint (22) formed in the spider, wherein said joint (22) is a ball and socket joint comprising a ball (21) arranged in a cavity (15 ), said tripod also comprising locking means (24) to lock said ball (21) in the desired orientation, wherein said tripod comprises restraining means (19), independent of said locking means (24), to restrain said ball (21) pivotably in the cavity (15); and a sleeve (25) arranged in the seat and clamping means (27, 28, 29) to clamp said sleeve (25) onto the pillar (12) to prevent axial sliding thereof. 2. A tripod according to claim 1 in which the sleeve ( 25) is radially contractible in the region of at least one of its axial ends, and the clamping means (27, 28, 29) are provided on the orientable element (21) and are able to compress the sleeve radially in the region of the at least one end as a result of the operation of the clamping means. 3. A tripod according to claim 1 in which the clamping means comprise a ring nut (29) engaged by screwing on a threaded collar (21a) fixed firmly to the ball (21) and a conical surface (27) formed in the ring nut (29) and acting on a facing end of the sleeve (25) to exert a clamping force as a result of screwing the ring nut onto the collar. 4. A tripod according to claim 3 in which the clamping means comprise a second conical surface (28) formed in the seat (4 ) at an end remote from the collar (21a) and acting on an opposite end of the sleeve from the facing end of the sleeve, said opposite end being radially contractible. 5. A tripod according to claim 1 in which the ball (21) is housed in said cavity (15) of the spider ( 3) between two facing abutment surfaces (16, 20). 6. A tripod according to claim 1 in which pressure means ( 24) are provided on the spider and act on the orientable element ( 21) to prevent said orientable element from pivoting relative to the spider.