Invention Grant
- Patent Title: Pulldown apparatus
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Application No.: US17726678Application Date: 2022-04-22
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Publication No.: US11982138B2Publication Date: 2024-05-14
- Inventor: Satish Nutakki , Kurt Steven Goslovich , Ananda Sudhakar Ponnusamy , Christopher John Demick
- Applicant: Caterpillar Inc.
- Applicant Address: US IL Peoria
- Assignee: Caterpillar Inc.
- Current Assignee: Caterpillar Inc.
- Current Assignee Address: US IL Peoria
- Agency: von Briesen & Roper, s.c.
- Main IPC: E21B19/084
- IPC: E21B19/084 ; E21B7/02

Abstract:
The pulldown apparatus may comprise a main stage and a secondary stage. The main stage may comprise a cylinder, a main head, a main gland, a piston and a main rod. The cylinder defines a chamber and includes a first end and a second end. The main gland and the piston is disposed in the chamber. The main rod is disposed in the chamber between the piston and the second end. The secondary stage includes a secondary head, a secondary gland, a secondary rod and a flange. The secondary gland is disposed in the chamber. The secondary rod is coupled to the flange. The flange is coupled to the main stage and disposed inside the cylinder between the piston and the secondary rod. The cylinder is slidable over the main rod, the piston and the secondary rod.
Public/Granted literature
- US20230340839A1 PULLDOWN APPARATUS Public/Granted day:2023-10-26
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