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US 7,722,302 B2Granted
Self locking tensioner
AssigneeOceaneering International, Inc.
InventorsCharles Robert Mynhier, Charles Tyrrell
Life of this patent
Estimating the term…
Abstract
The present invention is directed to a self locking tensioner that can be used to place a piston or stud in tension. The present invention is directed to a tensioner comprising slip wedges positioned between a piston and a body which houses the piston and the slip wedges.
Claims21
A tensioner comprising:
- (a) a body comprising a central channel comprising an upper cylindrical section and a lower conical section, said central channel defining a longitudinal axis;
- (b) a piston member centrally located in said central channel comprising a longitudinal shaft and a top region comprising an upper lip;
- (c) at least two slip wedges extending into the conical section of the central channel adjacent to the piston each of said slip wedges becoming narrower as the distance from the upper cylindrical section increases;
- (d) a wedge piston mounted above the slip wedges in the central channel;
- and
- (e) a first fluid flowpath extending through the upper lip to a pressurization region of the upper cylindrical section above the wedge piston.
3 more elements
A tensioner comprising:
- (a) a body comprising a central channel comprising an upper cylindrical section and a lower conical section, said central channel defining a longitudinal axis;
- (b) a piston member centrally located in said central channel comprising a longitudinal shaft and a top region comprising an upper lip;
- (c) at least two slip wedges extending into the conical section of the central channel adjacent to the piston, each of said slip wedges comprising an inner surface that is substantially parallel to the longitudinal axis, and an outer surface that is oriented at an acute angle to the inner surface, such that each of the slip wedges becomes narrower as the distance from the upper cylindrical section increases;
- (d) a wedge piston mounted above the slip wedges in the central channel;
- and
- (e) a first fluid flowpath extending through the upper lip to a pressurization region of the upper cylindrical section above the wedge piston.
3 more elements
A tensioner comprising:
- (a) a body comprising a central channel comprising an upper cylindrical section and a lower conical section, said central channel defining a longitudinal axis;
- (b) a piston member centrally located in said central channel comprising a longitudinal shaft and a top region comprising an upper lip;
- (c) at least two slip wedges extending into the conical section of the central channel adjacent to the piston;
- (d) a wedge piston mounted above the slip wedges in the central channel;
- and
- (e) a first fluid flowpath extending through the upper lip to a pressurization region of the upper cylindrical section above the wedge piston, said flowpath being oriented substantially parallel to the longitudinal axis.
3 more elements
Dependencies are inferred from the claim text.