PATENT CLAIM ANALYSIS

Application Number: 15902660
Application Type: Utility
Filing Date: 2018-02
Publication Date: 2018-08
Patent Classification: ["092", "071000"]

Abstract:
An articulated coupling is provided for a piston sealing device for a piston which includes a fixed skirt and a sliding skirt interconnected by a mechanical inter-skirt connection for axially compressing a continuous extensible segment under the action of a sliding skirt spring, the coupling replacing, on the one hand, the fixed skirt by a ball-joint skirt and providing, on the other hand, a troncospherical piston end which cooperates with a skirt troncospherical bearing surface provided on the ball joint skirt while an articulation unit interposed between the inter-skirt mechanical connection and the piston and/or between the connection and the sliding skirt.

Claim (Index 1):
An articulated coupling ( 1 ) for a piston sealing device ( 2 ), the latter being provided for a piston ( 3 ) operating in a cylinder ( 4 ) so as to constitute a fluid chamber ( 5 ), said piston ( 3 ) comprising a piston head ( 6 ) which comprises a fixed skirt ( 7 ) and which has, on the one hand, a piston bearing face ( 8 ) for exerting a force on transmission means ( 9 ) and, on the other hand, a compression face ( 10 ) opening into the fluid chamber ( 5 ) for receiving the pressure of a fluid ( 11 ) while a sliding skirt ( 12 ) is housed in the cylinder ( 4 ) with a small clearance, in the extension of the piston head ( 6 ) of the side of the compression face ( 10 ) and in the axis of said head ( 6 ), said sliding skirt ( 12 ) being connected to said head ( 6 ) by an inter-skirt mechanical connection ( 13 ) which allows it to move in longitudinal translation with respect to said head ( 6 ), while a pressure transmission channel ( 14 ) is arranged inside the sliding skirt ( 12 ) and traverses it through and through in the axial direction, the piston sealing device ( 2 ) also comprising a continuous extensible segment ( 15 ) interposed between the fixed skirt ( 7 ) and the sliding skirt ( 12 ), said segment ( 15 ) comprising a segment inner cylindrical face ( 16 ) subjected to the pressure of the fluid ( 11 ) through the pressure transmission channel ( 14 ), a segment outer cylindrical face ( 17 ) being able to come into contact with the cylinder ( 4 ), a fixed skirt-side segment axial face ( 18 ) held, directly or indirectly, in sealing contact with the fixed skirt ( 7 ) and a sliding skirt-side segment axial face ( 19 ) held, directly or indirectly, in sealing contact with the sliding skirt ( 12 ) even though a sliding skirt spring ( 20 ) tends to bring the sliding skirt ( 12 ) closer to the fixed skirt ( 7 ) and to axially compress the continuous extensible segment ( 15 ), said coupling ( 1 ) being characterized in that it comprises:\n a ball joint skirt ( 22 ) acting as a fixed skirt ( 7 ) traversed axially by the inter-skirt mechanical connection ( 13 ) and interposed between the continuous extensible segment ( 15 ) and the piston head ( 6 ), said skirt ( 22 ) comprising, on the one hand, an axial face of a piston head-side swiveling skirt ( 23 ) kept in sealing contact with the piston head ( 6 ) and, on the other hand, an axial face of a sliding skirt-side swiveling skirt ( 25 ) which is held, directly or indirectly, in sealing contact with the continuous extensible segment ( 15 ) while the sliding skirt spring ( 20 ) holds the stack formed by the ball joint skirt ( 22 ) and the continuous extensible segment ( 15 ) clamped between the sliding skirt ( 12 ) and the piston head ( 6 ); a troncospherical piston end ( 21 ) arranged on the compression face ( 10 ), the center of the sphere of which said end ( 21 ) constitutes a portion being positioned in the vicinity of the longitudinal axis of the piston ( 3 ); a troncospherical skirt bearing surface ( 24 ) arranged on the axial face of a piston head-side swiveling skirt ( 23 ) and whose shape is complementary to that of the troncospherical piston end ( 21 ), the contact between said bearing surface ( 24 ) and said end ( 21 ) forming a ball joint around which the ball joint skirt ( 22 ) is rotatable to orient itself with respect to the piston ( 3 ); articulation means ( 40 ), directly or indirectly interposed between the inter-skirt mechanical connection ( 13 ) and the piston ( 3 ) and/or between said connection ( 13 ) and the sliding skirt ( 12 ).

Metadata:
- Claim Count in Document: 32.0
- Percentile: 88.0
- Lexical Diversity: 1.96364
- Patent Class: 92.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['14338518', '15386320', '14731836', '14171972', '10959476']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.6917217566079144
- 35 USC 102 Novelty (BERT): 0.4891776040962518
- Combined Prediction Score: 0.6714673413567481
- Mean Citation Score: 248.843916
- Max Citation Score: 340.8013
- Similarity Product: 276.1392856707037

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 0
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test