Ratchet transmission
US4128152A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 6, 1977 |
| Grant date | Dec 5, 1978 |
| Priority date | — |
| Expiry date | Apr 6, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/1561
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A ratchet transmission for height and weight adjustment of suspension seats of vehicles having two independent gear-shift-lever shafts rotatably disposed about a common axis within a gear casing, a pair of ratchet wheels being respectively rigidly fixed on the gear-shift-lever shafts, a cam disc abutted by the gear casing and swivelable around the axis of the gear-shift-lever shafts, a pair of counteracting and pre-tensioned pawls for each of the ratchet wheels which are selectively latchable thereto by turning the cam disc, a guide system for leading the vehicle seat in a straight line and a spring component, including an elevating screw turnable by one of the gear-shift-lever shafts, a roving nut and a compressed spring, the spring component being adjustable as a whole for, free of tension, the purpose of height adjustments, through one of the gear-shift-lever shafts, and the compressible spring being pre-tensioned through the other of the gear-shift-lever shafts, by axially moving the roving nut, which forms a movable buttress of the spring and which is itself movable together with the elevating screw.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.