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US 4,749,187 AGranted
Track hurdle with adjustble latching mechanism and adjusting weight mechanism
AssigneeOregon Track Equipment Co.
InventorsWilliam S. Dellinger, Nils A. Norman
Life of this patent
Estimating the term…
Abstract
The track hurdle of the instant invention includes a base which rests on the ground and which includes a horizontal, hollow foot, and a hurdle bar assembly telescopically mounted on the base. The hurdle includes height-setting means for adjusting the height of a hurdle bar above a track surface and a constant pull-over weight mechanism for maintaining a constant pull-over weight at the top of the hurdle bar, regardless of the height of the hurdle bar above the track surface.
Claims7
In a track hurdle including a base which rests on the ground and which includes a horizontal hollow foot, and a hurdle bar assembly telescopically mounted on said base:
- first adjustable means including a weight slidably mounted within and for movement along the hollow foot, biasing means urging said weight in one direction along the foot, and linking means for linking said weight and the hurdle bar assembly whereby movement of the hurdle bar assembly on the base produces movement of said weight along the foot, said linking means including a set of pulleys disposed in the base, and a cable trained over said pulleys, one end of said cable being operatively affixed to said weight;
- and
- second adjustable means operatively interposed between the hurdle bar assembly and said linking means and fixed to the other end of said cable for producing movement of said weight along the hollow foot without movement of the hurdle bar assembly.
A track hurdle comprising:
- a base including a pair spaced apart hollow standards, each standard having a substantially vertical portion joined at a right angle to a substantially horizontal portion, and a cross piece rigidly interconnecting said standards;
- a hurdle bar;
- a pair of hurdle bar supports joined to said hurdle bar, each telescopically mounted on a respective vertical portion for adjusting the height of said hurdle bar;
- a constant pull-over weight mechanism for maintaining a constant predetermined pull-over weight at the top of said hurdle bar, said weight mechanism comprising a weight slidably located in each horizontal portion, spring biasing means for urging said weights toward an end of said horizontal portions, and weight-positioning means operatively interposed between each of said weights and its respective hurdle bar support for positioning the weights in said horizontal portions to maintain said predetermined pull-over weight, said weight-positioning means including a cable having one end thereof operatively affixed to said weight and cable-retaining means affixed to the other end of said cable, a set of pulleys disposed in each standard having the cable trained thereover and a cable-adjustment mechanism operatively interposed between said cable-retaining means and said bar support to adjust the position of said weight for a given bar support position thereby to adjust the pull-over weight for a given hurdle bar height;
- and
- height-setting means for selectively fixing the height of the hurdle bar above a track, said setting means including a latch adjustably mounted on at least one hurdle bar support, latch retainers distributed along the length of said vertical portion, and a manually operated latch release adjustably mounted on at least one of said hurdle bar supports connected to said latch for adjusting the latch between a disengaged position free of a retainer and a position freeing the latch for registering with a retainer.
3 more elements
An adjustable height track hurdle comprising:
- a base including a pair of spaced apart, hollow, tubular L-shaped standards, and a cross piece connecting the standards;
- an elongate hurdle bar;
- a pair of hurdle bar supports joined to said hurdle bar adjacent the ends thereof telescopically mounted on said standards for permitting adjustment of the height of said hurdle bar;
- pull-over weight-setting mechanism for maintaining a constant predetermined pull-over weight at the top of said hurdle bar, said mechanism comprising a weight slidably located in the horizontal portion of each standard, and weight-positioning means operable to shift said weights as the height of the hurdle bar is changed to maintain a predetermined pull-over weight as measured on said hurdle bar;
- said weight-positioning means including cable-retaining means and a cable having one end thereof attached to said weight, the other end of said cable being attached to said cable-retaining means, and a cable-adjustment mechanism operatively interposed between said cable-retaining means and bar support to adjust the position of said weight for a given bar support position.
2 more elements
An adjustable height track hurdle comprising:
- a base including a pair of spaced apart hollow, tubular standards, each standard having a substantially vertical portion joined at a right angle to a substantially horizontal portion, each vertical portion having bores distributed therein at preselected distances from the bottom thereof, and a cross piece connecting said standards;
- a hurdle bar;
- a pair of hurdle bar supports joined to the ends of the hurdle bar telescopically mounted on said vertical portions permitting adjustment of the height of said hurdle bar;
- height-setting means for selectively fixing the height of said hurdle bar above a track, said setting means including a latch mechanism, having a latch pin, mounted on each of said bar supports, said latch pin cooperating with a bore in said vertical portion to hold the bar support at a preselected height, a latch release pivotally mounted on said bar support adjacent said hurdle bar, and a connecting rod extending between said latch pin and said release lever, said mechanism being manually operable to selectively shift said latch pin between a disengaged position free of a bore and a position enabling said latch pin to register with a bore;
- a constant pull-over weight mechansim for maintaining a constant, predetermined pull-over weight at the top of said hurdle bar regardless of hurdle bar height, said weight mechanism comprising a weight slidably located in each horizontal portion, spring biasing means for urging said weights toward an end of said horizontal portions, and weight-positioning means operable to position the weight in said horizontal portion as said hurdle bar height is changed, said weight-positioning means including a cable having one end thereof operatively affixed to said weight, cable-retaining means attached to the other end of said cable, and a set of pulleys disposed in each standard, said cable being trained over said pulleys;
- and
- a cable-adjustment mechanism operatively interposed between said cable-retaining means and said bar support to adjust the position of said weight for a given bar support position thereby to adjust the pull-over for a given hurdle bar height.
4 more elements
Dependencies are inferred from the claim text.