John B Haas

US Patent:

6439087, Aug 27, 2002

Filed:

May 30, 2000

Appl. No.:

09/580124

Inventors:

John L. Haas - Northridge CA

Assignee:

Rothenberger USA, Inc. - Monterey Park CA

International Classification:

B23B 2500

US Classification:

82163, 82164, 82170

Abstract:

Plastic surface pipe rotary drive apparatus, comprising in combination a drive rotor rotatable about a central axis; a set of jaws spaced about a central axis, and operatively connected to a rotor to rotate about parallel jaw axes in response to rotation of the drive rotor, the jaws having work engaging surfaces extending eccentrically relative to their respective jaw axes; and each of the surfaces extending generally circularly about a locus offset from a jaw axis associated with the surfaces.

US Patent:

47281189, Mar 1, 1988

Filed:

Apr 21, 1986

Appl. No.:

6/853904

Inventors:

John L. Haas - Rowland Heights CA

Assignee:

Roco Tool Group, Inc. - Monterey Park CA

International Classification:

B62B 302

US Classification:

280641

Abstract:

A collapsible carrier for a heavy machine, has (a) an upper platform adapted to support the machine, (b) first leg structure pivotally attached to the platform and extending downwardly and forwardly relative to the platform, (c) second leg structure having upper extent located to support the platform and extending downwardly and rearwardly relative to the platform, (d) the first and second leg structures pivotally interconnected below the level of the platform, (e) there being a slide surface associated with the platform and presented to transmit loading to the second leg structure upper extent as that upper extent travels therealong between first and second positions corresponding to raised and lowered positions of the platform and there being stops associated with the platform to limit such travel at the first and second positions, (f) releasable mechanism to lock the second leg structure upper extent to the platform at the first and second positions, (g) and a counterbalance operatively connected with said first and second leg structures to yieldably resist downward movement of the platform, thereby counterbalancing the weight of the machine, (h) the releasable mechanism including at least one arm integral with the second leg structure upper extent and projecting upwardly adjacent at least one of the stops in the first position of the second leg structure upper extent, and at least one plunger carried by the arm to releasably attach to structure associated with the platform, and block movement of that platform relative to the second leg structure.