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US 5,513,554 AGranted
Lockable telescopic device and use of the same
AssigneeRoger Paulusson AB
InventorRoger Paulsson
Life of this patent
Estimating the term…
Abstract
The invention relates to a lockable telescopic device (1) which includes a cylindrical tube (10) and a piston rod (3). The piston rod (3) includes an expandable locking device (60) which, when active, forcibly abuts a part of the inner wall of the tube (10). The expandable locking device (60) includes two sleeves (61, 62) which accompany movement of the piston rod (3) in the longitudinal direction of the device (1). The piston rod (3) and the tube (10) are locked against relative movement by rotating the sleeves (61, 62) relative to one another with the aid of a lever (51) mounted on the piston rod. The invention also relates to the use of the lockable telescopic device in conjunction with so-called engine shelves.
Claims20
A lockable telescopic device for positioning at least one movable object relative to at least one other object, said lockable telescopic device comprising:
- a cylindrical tube;
- said cylindrical tube having an inner circumference and an outer circumference;
- said cylindrical tube having a first end and a second end;
- said first end of said cylindrical tube comprising first attachment means for attaching to one of:
- said at least one movable object, and
- said at least one other object;
- a substantial portion of said cylindrical tube being disposed between said first end and said second end of said cylindrical tube;
- a piston rod;
- said piston rod being slidably disposed through said first end of said cylindrical tube;
- said piston rod having a longitudinal axis;
- said cylindrical tube having a longitudinal axis;
- said longitudinal axis of said cylindrical tube defining an axial direction parallel to said longitudinal axis of said piston rod;
- said piston rod having a first end disposed within said cylindrical tube;
- said piston rod having a second end extending from said cylindrical tube;
- said second end of said piston rod comprising second attachment means for attaching to the other of:
- said at least one movable object, and
- said at least one other object;
- said first attachment means and said second attachment means defining therebetween, a length of said lockable telescopic device;
- said piston rod for slidably adjusting said length of said lockable telescopic device;
- a first sleeve;
- said first sleeve being disposed substantially concentric about said piston rod;
- a second sleeve;
- said second sleeve being disposed substantially concentric about said first sleeve;
- said second sleeve having an outer circumference;
- said outer circumference of said second sleeve abutting said inner circumference of said cylindrical tube;
- said first sleeve being rotatably connected with said piston rod;
- said second sleeve being rotatably connected with said cylindrical tube to rotate with said cylindrical tube;
- a substantial portion of said outer circumference of said second sleeve making frictional contact with a substantial portion of said inner circumference of said cylindrical tube;
- said frictional contact between said second sleeve and said cylindrical tube for providing a substantial locking force of said lockable telescopic device;
- and
- means for frictionally engaging said substantial portion of said outer circumference of said second sleeve with said substantial portion of said inner circumference of said cylindrical tube to axially lock said cylindrical tube and said piston rod with respect to one another.
28 more elements
A device for positioning at least one movable object relative to at least one other object, said device comprising:
- a first tubular member, said first tubular member having an inner surface, and said first tubular member defines a longitudinal axis and first and second directions substantially parallel to said longitudinal axis, said second direction being substantially opposite to said first direction;
- first attachment means for attaching said first tubular member to one of:
- the at least one movable object, and
- the at least one other object;
- a second member, said second member comprising at least a portion slidably disposed within said first tubular member;
- second attachment means for attaching said second member to the other of:
- the at least one movable object, and
- the at least one other object;
- at least one of said first tubular member, and said second member, being moveable in said first and second directions with respect to the other of said first tubular member and said second member to move the at least one movable object with respect to the at least one other object;
- and
- means for locking said first tubular member and said second member in an axially fixed position with respect to one another to fixedly position the at least one movable object and the at least one other object with respect to one another, said means for locking comprising:
- at least one sleeve disposed about said at least a portion of said second member disposed within said first tubular member, means for axially fixing said at least one sleeve with respect to said at least a portion of said second member for movement along with said second member;
- said at least one sleeve comprises an outer surface disposed towards said first tubular member, said outer surface of said at least one sleeve having an outer periphery, said outer periphery abutting an adjacent portion of said inner surface of said first tubular member;
- a substantial portion of said outer periphery of said at least one sleeve is disposed for making frictional contact with a substantial portion of said inner surface of said adjacent area of said first tubular member;
- and
- means for frictionally engaging said substantial portion of said at least one sleeve with said substantial portion of said inner surface of said adjacent area of said first tubular member to axially lock said first tubular member and said second member with respect to one another.
13 more elements
Dependencies are inferred from the claim text.