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US 6,615,703 B2Granted
Hydraulic or pneumatic cylinder
AssigneeRazorback Vehicles Corporation Limited
InventorJeffrey Kendall
Life of this patent
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Abstract
A pneumatic or hydraulic cylinder (10) having a bore (12) cooperating with a piston (18). Extending from the piston (18) is a piston rod (37). There is further provided a pawl (26) which is engageable with the piston (18) to retain the piston (18) at a desired location. The pawl (26) is moved from engagement with the piston (18) upon fluid under pressure being delivered to one end of the cylinder (10).
Claims12
A hydraulic or pneumatic cylinder including:
- a bore generally surrounding a chamber having opposite ends;
- a piston in said bore and co-operating therewith to divide said chamber into a first and a second sub-chamber;
- a piston rod fixed to and extending from said piston and extending beyond one of said ends;
- means closing said opposite ends;
- releasable locking means to retain said piston at a desired location within said bore, said locking means being releasable to permit movement of said piston upon delivery of a fluid under pressure to one of said sub-chambers;
- and
- duct means extending from the bore to provide for fluid flow from said second sub-chamber to said first sub-chamber when said locking means is engaged with said piston to retain said piston at said desired location, wherein said duct means is closed when said piston is displaced from said desired location.
4 more elements
Dependencies are inferred from the claim text.