Air spring seat and air pump
US4954051A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 12, 1989 |
| Grant date | Sep 4, 1990 |
| Priority date | — |
| Expiry date | Jan 12, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60N2/525
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An air spring seat principally for buses, trucks, boats or other vehicles includes a manual air pump for inflating and deflating the air spring. The manual air pump includes a piston having a rearward air intake stroke, a forward compression stroke to deliver pressurized air through a check valve delivery and venting system to the air spring, a pressure stabilized at rest position at the end of the compression stroke and a forward venting stroke from the at rest position mechanically to release air from the air spring through the check valve delivery and venting system. A floating seal carried by the piston provides a fluid tight seal between the piston and pump body during the piston compression stroke but permits air to move from the intake side of the piston to the compression side of the piston during the piston intake stroke. The piston movements are all controlled by a manual lever handle readily accessible to the seat occupant. The lever handle is nested adjacent the seat cushion in the at rest position of the piston, is pulled upwardly from the at rest position to effect the piston intake stroke, is pushed downwardly to the at rest position to effect the piston compression …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.