Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Browse by Category: Main > Construction
Class Information
Number: 175/301
Name: Boring or penetrating the earth > Below-ground (1) hammer, or (2) impact members > With releasable means to detachably retain telescoping members against axial reciprocation > Frangible
Description: Apparatus in which said holding means comprises an element which is destructible so that said element is used only one time.










Patents under this class:

Patent Number Title Of Patent Date Issued
5857710 Multi-cycle releasable connection Jan. 12, 1999
5495902 Coil tubing hydraulic jar device Mar. 5, 1996
4576229 Device for facilitating release of stuck drill collars Mar. 18, 1986
4466621 Rotary drill bit multiple seal assembly Aug. 21, 1984
4081043 Hydraulic jars for bore hole drilling Mar. 28, 1978
4007790 Back-off apparatus and method for retrieving pipe from wells Feb. 15, 1977











 
 
  Recently Added Patents
Photoelectric conversion module
(4941
Universal handle extension for unloading butterfly valve for tank trailer or other vehicle
Front face of a vehicle wheel
Plants and seeds of corn variety CV577261
Encoder that detects positional information of a moving body generating interference fringes that move in opposite directions
Method for making an abrasion-resistant steel plate and plate obtained
  Randomly Featured Patents
High speed infrared wide angle lens system
Dual-chamber impact detector
Battery assembly for portable electronic device
Golf club travel bag
Recording apparatus
Torpedo casting float
Spread spectrum signal demodulating method and apparatus
Wrapping method for producing a package and for wrapping an article
Guided filter with support wire and methods of use
Liquid or granular automatic dishwashing detergent compositions containing silicate and low molecular weight modified polyacrylate coploymers