US 2014/0338526 A1 · VARIABLE-VOLUME HEAD

Abstract

Disclosed is a device that includes a natural-gas compression system having a natural-gas powered combustion engine, a compression cylinder configured to receive natural gas and output compressed natural gas, a piston disposed in the compression cylinder and configured to translate through the compression cylinder in response to mechanical power received from the natural-gas powered combustion engine, and a variable-volume head mounted to the compression cylinder and configured to vary a compressed volume of the compression cylinder. In some instances, the variable-volume head includes a head body, an adjustment screw rotatably coupled to the head body, a plug moveable in threaded engagement with the adjustment screw, and an anti-rotation device coupled to the plug, the head body, or both. The anti-rotation device may be configured to impede the plug from rotating relative to the head body as the adjustment screw rotates.

Claims25

Dependent claims

A system, comprising:

a variable-volume head, comprising:
a head body;
a plug movably disposed in the head body;
and
an adjustment shaft comprising a first threaded portion coupled to the plug at a first thread interface, a second threaded portion coupled to a portion of the variable-volume head at a second thread interface, and a first sealing portion disposed axially between the first threaded portion and the second threaded portion.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

14/287,011Filed 24 May 2014

Priority

30 May 2008

Published

20 Nov 2014

Term ends

Not estimatedThe source records don’t support an estimate.

Classification8 codes

F16J 1/00
Pistons
F04B 17/05
Pumps characterised by combination with, or adaptation to, specific driving engines or motors: driven by internal-combustion engines
F04B 35/002
Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or…:…
F04B 39/125
Casings; Cylinders; Cylinder heads; Fluid connections: cylinder heads

Family

Application61/057,790Us provisional application · filed 30 May 2008

Application12/933,848Continuation · filed 21 Sep 2010

Application14/287,011Continuation

US 2011/0020144 A1Published application

US 9,897,207 B2Related patent

US 2014/0338526 A1This patent

From the US filing history. Foreign family members aren’t listed.

Variable-volume head

Life of this patent

Variable-volume head

Life of this patent

Abstract

Claims25