Inventor
Walter Parzefall
Inventor
Bubenreuth, DE
Overview
Patents· 13 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
F16Dprimary
F16DCouplings for transmitting rotation60%
F16CShafts10%
F16JPistons10%
F15BSystems acting by means of fluids in general5%
F16KValves5%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests5%
Y10TTechnical subjects covered by former us classification5%
PatentTitleYear
6,502,682'Hydraulic release system'20036,470,909'Hydraulic system'20026,273,231'Fluid operated clutch disengaging apparatus'20015,547,058'Hydraulically actuatable device for disengaging a gearshift clutch of an automotive vehicle'19965,076,717'Polymeric sliding sleeve for clutch release bearings'19914,969,755'Inner bearing ring of a clutch release bearing'19904,911,277'Release bearing asssembly for a push type motor vehicle clutch'19904,863,005'Friction clutch'19894,850,467'Clutch release sleeve'19894,832,166'Friction clutch for motor vehicles'19894,773,516'Novel clutch lever support means'19884,648,500'Clutch release means'19874,544,212'Linear rolling bearing for rectangular bar'1985Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1985–1996Patents assigned to SCHAEFFLER WAELZLAGER KG (10)· patent assignee history
1985–2003Based in Bubenreuth, DE· patent location history
2001–2003Patents assigned to LUK LAMELLEN & KUPPLUNGSBAU (3)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| SCHAEFFLER WAELZLAGER KG | 10 | 1985–1996 |
| LUK LAMELLEN & KUPPLUNGSBAU | 3 | 2001–2003 |
Locations
| Location | Patents | Span |
|---|---|---|
| Bubenreuth, DE | 13 | 1985–2003 |