Hydraulic apparatus, handle, and method of providing an extendable handle
US8356548B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 26, 2009 |
| Grant date | Jan 22, 2013 |
| Priority date | — |
| Expiry date | Nov 15, 2031 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K31/46
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Handles, extendable handles, and linkage mechanisms are examples of apparatuses that include a body; a pivotably attached head; cylinder, actuator, or hydraulic actuator; a fluid passage or hose; and a valve, blocking means, or hydraulic control device. The valve, blocking means, or hydraulic control device may be normally open and may close only when held closed, and may be connected on one side to the fluid passage or hose and on another side to atmosphere. An operator may use a tool, such as a drywall flat box attached to the head, by holding the handle and controlling pivoting of the head by operating the valve. Methods include providing for an operator to control a tool on a handle, and include providing the handle and instructing the operator to actuate the blocking means to hold the tool in a constant orientation relative to the handle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.