Swing mount for playground equipment
US4014540A · kind A · utility
41Cited by
12References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 31, 1975 |
| Grant date | Mar 29, 1977 |
| Priority date | — |
| Expiry date | Mar 31, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T403/20
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A ball and socket joint for a swing for providing simultaneous swiveling and pivoting motion in any direction. The ball is preferably molded with an inner core and an outer shell of different colored materials. As material from the outer shell is worn away in normal wear, exposure of the inner core indicates visually the extent of wear which has taken place. A retainer member placed in load bearing relationship between a support bolt for the swing and the ball is intentionally made larger than the opening at the base of the socket to prevent the swing from dropping in case of breakage of the ball.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.