Load leveling air pump with pressure clutch
US4345773A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 5, 1979 |
| Grant date | Aug 24, 1982 |
| Priority date | — |
| Expiry date | Nov 5, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60G17/044
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An automatic load leveling air pump is adapted for use with an air adjustable shock absorber to maintain a substantially constant vehicle height despite changes in vehicle loading. The pump includes a housing connected to the vehicle axle and a pump piston connected to the vehicle frame. A feedback device slides within the housing in response to a spring and to air pressure and includes a pair of relatively movable portions which cooperate to act as a clutch against the housing during compression strokes of the pump piston. The pump piston, the housing and the feedback device enclose a compression chamber. The feedback device moves in response to air pressure to control the compression ratio of the compression chamber as the vehicle height changes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.