PATENT CLAIM ANALYSIS

Application Number: 15914417
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2018-08
Patent Classification: ["060", "670000"]

Abstract:
A high efficiency uniflow steam engine having automatic inlet and exhaust valves rather than camshaft operated valves includes an electromagnet and cooperating armature that actuates a cutoff control valve for closing a steam inlet valve at any time selected to cut off the flow of steam to the cylinder. Approaching the end of the exhaust stroke, e.g., about 0.12 inch before TDC the cylinder can be sealed to thereby compressing the remaining residual steam down to a minute clearance approaching zero, for example, 0.020 inch raising cylinder steam pressure enough to open the steam inlet valve without physical contact between the piston and the steam inlet valve eliminating tappet noise, shock and wear.

Claim (Index 2):
A steam engine comprising,\n a cylinder having a piston that is sealingly and slidably mounted therein at one end of a steam expansion chamber and is operatively connected to a crankshaft, a steam inlet valve that is constructed to seal a valve seat in the engine that communicates between a steam supply port and the steam expansion chamber, a cutoff control valve mounted for reciprocation in the engine that is constructed and arranged to seal an outlet to the steam expansion chamber and a lifter supported to reciprocate with the piston in a position to close the cutoff control valve as the piston approaches top dead center thereby sealing the steam expansion chamber proximate but prior to an end of the exhaust stroke such that a residual quantity of steam remaining in the steam expansion chamber is compressed by movement of the piston proximate an end of the exhaust stroke to a pressure that opens the inlet valve in response to a force applied to the inlet valve by the steam thus compressed.

Metadata:
- Claim Count in Document: 10.0
- Percentile: 90.0
- Lexical Diversity: 1.51899
- Patent Class: 60.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15794486', '13532853', '15077576', '12959025', '12387113']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7305709030205593
- 35 USC 102 Novelty (BERT): 0.5124241770225642
- Combined Prediction Score: 0.7087562304207599
- Mean Citation Score: 309.707278
- Max Citation Score: 337.04297
- Similarity Product: 299.8941289530999

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

Dataset: test