The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 24, 1987
Filed:
Oct. 24, 1985
Eduard Bergles, Graz, AT;
Fichtel & Sachs AG, Schweinfurt, DE;
Abstract
The bicycle gear hub constructed particularly as a five-speed hub with a back-pedalling brake comprises a single planetary transmission (27), of which the internal gear (55) and the planet carrier (29) can be coupled through ratchet locking mechanism (83, 89) alternately with a drive sleeve (81) which is axially displaceable upon shifting of the gears of the gear hub and which is intended to be coupled to a drive sleeve (81) coupled to a driver (11). The internal gear (55) comprises a control shoulder (93) for alternate controlling of the two ratchet locking mechanisms (83, 89). A further ratchet locking mechanism (71) which connects the internal gear (55) to the hub sleeve (7) is controlled by the axial movement of the internal gear (55). The planet carrier (29) is coupled to the hub sleeve (7) through a constantly engaged ratchet locking mechanism (67). The ratchet locking mechanisms (83, 85) provided on the drive sleeve (81) comprise both detents for transmitting the forwards torque and also of the back-pedalling torque. The planetary transmission (27) is constructed as a stepped gearing and comprises two sun wheels (57, 59) adapted to be coupled alternately to the hub shaft (1) and which mesh with correspondingly stepped planet wheels (49). Despite the large number of gears and the integrated back-pedalling brake, the gear hub is of compact construction.