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A locking device for a prism pole having a first telescoping member slidably located within a second telescoping member to selectively lock and unlock the first telescoping member relative to the second telescoping member. The locking device includes a housing having a sidewall with a bore extending

A locking device for a prism pole having a first telescoping member slidably located within a second telescoping member to selectively lock and unlock the first telescoping member relative to the second telescoping member. The locking device includes a housing having a sidewall with a bore extending therethrough. The upper end of the outer telescoping member is attached to the housing and the inner telescoping member is slidably located within the bore of the housing. First and second locking mechanisms, each comprising an annular ring, are disposed within the housing. Each ring includes a bore through which the inner telescoping member extends. The first locking mechanism is selectively pivotal between a first position, wherein the annular ring engages the inner telescoping member to prevent sliding movement in a first direction while allowing sliding movement in a second and opposite direction, and a second position wherein the first locking mechanism allows sliding movement in either direction. The second locking mechanism is pivotal between a first position, wherein sliding movement of the inner telescoping member is prevented in the second longitudinal direction while allowing sliding movement in the first direction, and a second position wherein the second locking mechanism permits sliding movement of the inner telescoping member in either direction.

대표청구항 ▼

A locking device for selectively locking a first telescoping member to a second telescoping member to prevent longitudinal movement therebetween, while selectively allowing the first telescoping member to slide in a first longitudinal direction with respect to the second telescoping member and to se

A locking device for selectively locking a first telescoping member to a second telescoping member to prevent longitudinal movement therebetween, while selectively allowing the first telescoping member to slide in a first longitudinal direction with respect to the second telescoping member and to selectively slide in a second and opposite longitudinal direction with respect to the second telescoping member, said locking device including: a housing including a sidewall having a first end and a second end and a bore extending though said housing between said first end and a second end of said sidewall, said housing being connectable to the second telescoping member and the first telescoping member extending through said bore; a first locking mechanism disposed within said housing, said first locking mechanism including a first engagement portion adapted to selectively engage the first telescoping member and a second engagement portion adapted to selectively engage the first telescoping member, said locking mechanism being pivotal between a first position and a second position, wherein said first locking mechanism, when in said first position, prevents longitudinal movement of the first telescoping member in the first longitudinal direction with respect to the second telescoping member, and when in said second position, said first locking mechanism permits movement of the first telescoping member in the first longitudinal direction with respect to the second telescoping member; a second locking mechanism disposed within said housing, said second locking mechanism including a third engagement portion adapted to engage the first telescoping member and a fourth engagement portion adapted to engage the first telescoping member, said second locking mechanism being pivotal between a first position, wherein said second locking mechanism prevents movement of the first telescoping member in the second longitudinal direction with respect to the second telescoping member, and a second position wherein said second locking mechanism permits movement of the first telescoping member in the second longitudinal direction with respect to the second telescoping member; means for biasing said first locking mechanism toward said first position; and an actuator member associated with said first and second locking mechanisms such that said actuator member may assume at least three positions, whereby when said actuator member is in said first position the first telescoping member is prevented from sliding longitudinally with respect to the second telescoping member in both the first and second longitudinal direction, whereby when said actuator member is moved to a second position said actuator member pivots said first locking mechanism to said second position wherein the first telescoping member is allowed to slide longitudinally with respect to the second telescoping member in the first longitudinal direction, and whereby when said actuator member is moved to the third position said actuator member pivots said second locking mechanism to said second position wherein the first telescoping member is allowed to slide longitudinally with respect to the second telescoping member in the second longitudinal direction.