Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
182 words
In a rail house car having openings along its sides, doors for closing said openings by movement along said car sides and laterally into and out of said openings, bottom and top rotating crank means moveably supporting and retaining said doors adjacent the lower portions thereof on longitudinal track means and adjacent the upper portions thereof within longitudinal retainer means, means to rotationally drive said crank means for selective lateral movement of said doors, the improvement comprising: said top crank means adjacent the upper portion of said doors including skid means moveably engageable with the inner surface of said longitudinal retaining means when said doors are laterally substantially within said openings and roller means moveably engageable with the inner surface of said longitudinal retaining means when said doors are laterally substantially outside of said openings and free to move on said longitudinal track, thereby minimizing wear of said longitudinal retaining means by means of relative movement of said roller means and said longitudinal retaining means when said doors are laterally substantially within said openings and said rail house car is in motion.
Claim 2
Dependent Claim
182 words
In a rail house car having openings along its sides, doors for closing said openings by movement along said car sides and laterally into and out of said openings, bottom and top rotating crank means moveably supporting and retaining said doors adjacent the lower portions thereof on longitudinal track means and adjacent the upper portions thereof within longitudinal retainer means, means to rotationally drive said crank means for selective lateral movement of said doors, the improvement comprising: said top crank means adjacent the upper portion of said doors including skid means moveably engageable with the inner surface of said longitudinal retaining means when said doors are laterally substantially within said openings and roller means moveably engageable with the inner surface of said longitudinal retaining means when said doors are laterally substantially outside of said openings and free to move on said longitudinal track, thereby minimizing wear of said longitudinal retaining means by means of relative movement of said roller means and said longitudinal retaining means when said doors are laterally substantially within said openings and said rail house car is in motion.
Claim 3
Dependent Claim
39 words
The rail house car of claim 1 in which the longitudinal retaining means includes a recess into which said roller means protrudes when said doors are laterally substantially within said openings and said rail house car is in motion.
Claim 4
Dependent Claim
29 words
The rail house car of claim 2 in which the recess includes a longitudinally sloping surface merging its back wall with said inner surface of said longitudinal retaining means.
Claim 5
Dependent Claim
35 words
The rail house car of claim 1 in which said skid means of each top crank means extend longitudinally adjacent to and on either side of said roller means associated with said top crank means.
Claim 6
Dependent Claim
19 words
The rail house car of claim 4 in which the skid means are surface portions of an integral casting.
Claim 7
Dependent Claim
31 words
The rail house car of claim 1 in which a plurality of doors are provided on two longitudinal track means with each longitudinal track means having a corresponding longitudinal retainer means.
Claim 8
Dependent Claim
84 words
The rail house car of claim 1 in which each door has an auxiliary crank means in addition to its bottom and top rotating crank means and said auxiliary crank means include skid means engageable with the inner surface of said longitudinal retaining means when said doors are laterally substantially within said openings and roller means moveably engageable with the inner surface of said longitudinal retaining means when said doors are laterally outside of said openings and free to move on said longitudinal track.