Split compression piston
US9562738B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 6, 2014 |
| Grant date | Feb 7, 2017 |
| Priority date | — |
| Expiry date | Apr 13, 2035 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF41B11/642
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
In a spring piston airgun, a compression piston is provided for longitudinal translation within a compression tube in response to a motive force. The compression piston includes a main piston body and a piston head, wherein the piston body and piston head are coupled for partial independent translation along a longitudinal axis. A resilient compressible bushing is longitudinally intermediate a portion of the piston body and the piston head, such that upon a deceleration of the piston head, the piston body is not immediately acted upon by the deceleration, rather the bushing absorbs a portion of the deceleration and radially expands to contact the compression tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.