Retractable handle for hand trucks or the like
US5464244A · kind A · utility
Inventor
Key dates
| Filing date | Oct 25, 1994 |
| Grant date | Nov 7, 1995 |
| Priority date | — |
| Expiry date | Oct 25, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62B2202/24
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A retractable handle including two parallel sleeves, a cross member connected between the sleeves at the top, and two extension rods connected in parallel and moved in and out of the sleeves, the cross member being incorporated with a spring supported pressure plate, the pressure plate having two beveled push blocks at two opposite ends, the extension rods having two spring-supported lock bolts horizontally disposed at the bottom, wherein the lock bolts are forced by the respective springs through respective locating holes on the sleeves into respective bottom notches on the cross member and stopped above the beveled push blocks to lock the retractable handle in the operative position when the extension rods are pulled out of the sleeves; the lock bolts are forced backwards from the bottom notches of the cross member into the locating holes on the sleeves, when the pressure plate is depressed against the cross member, permitting the extension rods to be moved back inside the sleeves and received in the collapsed position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.