Stable tripod for telescope
The present invention provides a stable tripod stand for sensitive optical devices such as telescopes and the like. The tripod may be moved around on wheels which are coupled to casters and when positioned may be secured to the ground to provide an adjustable and highly stable support that significantly reduces the incidence of jitter. The tripod includes a stabilizer member that extends through the casters to selectively engage the ground. The leg members of the tripod have a triangular shape and support links between the platform and the leg members form interlocking triangular supports which reinforce the leg members.
1. A tripod for supporting a device above a ground surface comprising:
a) a platform base for supporting the device;
b) three leg assemblies coupled to the platform base, each said leg assembly comprising a triangular structure having an apex located at a foot of each leg assembly and comprising a pair of rods having first ends coupled to said platform base a predetermined distance apart and having distal ends coupled to said foot;
c) three support link assemblies extending in a substantially vertically downward direction to a central point below said base, each said support link assembly comprising a triangular structure having an apex located at said central point and comprising a pair of members coupled to said base a predetermined distance apart at a first end and coupled together at said central point;
d) three sets of stabilizer links coupled at one end to said central point and at a second end to a respective one of said leg assemblies; and
e) three caster assemblies coupled to respective ones of said leg assemblies at a distal end thereof, each caster assembly having a stabilizer member acting adjacent to said caster assembly so as to bear selectively against the ground surface.
2. The tripod of claim 1 wherein said caster assemblies have at least one wheel.
3. The tripod of claim 1 wherein each of said caster assemblies includes a pair of wheels.
4. The tripod of claim 3 wherein said pair of wheels are spaced a predetermined distance apart and said stabilizer member comprises a threaded bolt inserted through a threaded aperture in said foot so as to be selectively extendable between said pair of wheels.
5. The tripod of claim 1 wherein each of said leg assemblies includes a foot having a threaded aperture and wherein said stabilizer member is selectively adjustable through said threaded aperture.
6. The tripod of claim 5 wherein said stabilizer members comprise elongate ground surface engaging members.
7. The tripod of claim 6 wherein said elongate ground surface engaging members are threaded rods.
8. The tripod of claim 7 wherein each of said feet has a threaded aperture adapted to receive said threaded rods.
9. The tripod of claim 1 wherein the platform base includes three hollow cylindrical members coupled to said first ends of each of said rods in each respective leg assembly.