Spike driving apparatus
US4273052A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 24, 1978 |
| Grant date | Jun 16, 1981 |
| Priority date | — |
| Expiry date | Mar 24, 1998 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01B29/26
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Apparatus for driving railroad spikes having at least one pair of hydraulic driving rams and associated spike holders and spike feeding arms. Each ram and its associated spike holder and spike feeding arm is suspended from an adjustable head supported in a mounting frame. Each head is individually movable in a first direction parallel to railroad track rails and in a second direction perpendicular to railroad track rails so that each ram and associated spike holder can be independently adjusted relative to a tie plate hole through which a spike is to be driven and both rams and associated spike holders are adjustable in unison in a first direction parallel to railroad track rails and in a second direction perpendicular to railroad track rails to spot the spikes over the holes in a tie plate through which the spikes are to be driven. A plurality of threaded adjustment members for individually moving each head to set the rams and associated spike holders in a pattern corresponding to the location of the holes in a tie plate and hydraulic cylinders and rods to adjust the rams and associated spike holders in unison to spot the spikes at the holes in each individual tie plate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.