Tire building former
CA 1278736 C · Owner: Apsley Metals Limited · Inventors: Wright, Anthony R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A cylindrical tire building former (11) has two sets of radially expandable segments (37) or (38) located one set at each axial end of the former. The sets of segments (37) or (38) are expanded by engagement of each segment with an axially moveable wedge member (36). The wedge member (36) may comprise an annular body, or an annular array of individual wedges. The wedge member (36) is moved by operation of a plurality of screw struts (47) which are arranged on a pitch circle and which are each rotated by a planet gear (51). The planet gears (51) are driven simultaneously by a central sun gear (52) to move the wedge member evenly along the screw struts (47).
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted January 8, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 8, 2008.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.