PATENT CLAIM ANALYSIS

Application Number: 15888241
Application Type: Utility
Filing Date: 2018-02
Publication Date: 2018-06
Patent Classification: ["166", "214000"]

Abstract:
A check valve for an injection string, comprises a cylindrical house with a central bore. A piston has a piston area exposed to the central bore, a protective sleeve at one end and a contact point affixed to the piston. A return spring is arranged between the house and the contact point so as to oppose a pressure force exerted on the piston area. A flapper valve—comprises a blade rotatable about a hinge between a closed position where the blade blocks a reverse flow through the central bore and an open position where the blade is received in a recess in a wall of the central bore. The piston is axially movable within the house between a first position where the protective sleeve is displaced from the recess and a second position where the protective sleeve covers the recess.

Claim (Index 1):
A check valve for an injection string, comprising:\n a cylindrical house with a central bore; a piston with a piston area exposed to the central bore; a protective sleeve at one end and a contact point affixed to the piston, wherein the piston area is greater in size than a radially extended area associated with the protective sleeve; a return spring arranged between the house and the contact point so as to oppose a pressure force exerted on the piston area; a flapper valve with a blade rotatable about a hinge between a closed position where the blade blocks a reverse flow through the central bore and an open position where the blade is received in a recess in a wall of the central bore; wherein the piston is axially movable within the house between a first position where the protective sleeve is displaced from the recess and a second position where the protective sleeve covers the recess, wherein the piston is configured to move from the first position to the second position after the flapper valve rotates from the closed position to the open position.

Metadata:
- Claim Count in Document: 7.0
- Percentile: 88.0
- Lexical Diversity: 2.05634
- Patent Class: 166.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['14150137', '15374326', '15888473', '12985907', '14313089']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7464576954392819
- 35 USC 102 Novelty (BERT): 0.4741402478358319
- Combined Prediction Score: 0.7192259506789369
- Mean Citation Score: 190.391392
- Max Citation Score: 194.92073
- Similarity Product: 147.3160471536982

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

Dataset: test