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For the Inventor, By the Inventor

Mount Pleasant, IA, United States of America

John F Shumaker

This inventor holds 13 USPTO granted patents. Top assignee: J. I. Case Company. Active years: 1977-1987.

IDiyas Innovation Intelligence. (2026). Inventor Profile: John F Shumaker. Retrieved from https://idiyas.com/inventor/john-f-shumaker

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

USPTO Granted Patents = 13

% Patents Active = 100.0

Average Co-Inventor Count = 1.1

ph-index = 7

Forward Citations = 122(Granted Patents)


Location History:

  • Mount Pleasant, IA (US) (1977)
  • Mt. Pleasant, IA (US) (1981 - 1987)

Company Filing History:

goldMedal13 out of 564 
 
J. I. Case Company
 patents

Years Active: 1977-1987

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13 patents (USPTO):Explore Patents
1. 4643631 - Quick coupling and release mechanism for buckets (1987-02-17),
2. 4411584 - Optimized earthworking tool operating linkage (1983-10-25),
3. 4370090 - Boom lock (1983-01-25),
4. 4365428 - Bucket mounted footing tool (1982-12-28),
5. 4364705 - Loader mechanism (1982-12-21),
6. 4360982 - Bucket with removable cutting plate (1982-11-30),
7. 4358240 - Asymmetric backhoe (1982-11-09),
8. 4344734 - Self-leveling bucket linkage (1982-08-17),
9. 4329797 - Amplified loader arm (1982-05-18),
10. 4309142 - See-through bucket (1982-01-05),
11. 4295779 - Straight arm loader (1981-10-20),
12. 4026428 - Stabilizer attachment for material handling implement (1977-05-31),
13. 4018458 - Vehicle stabilizer with adjustable foot (1977-04-19),

Title: John F. Shumaker: Innovator in Material Handling Technology

Introduction

John F. Shumaker is a notable inventor based in Mt. Pleasant, IA (US). He has made significant contributions to the field of material handling technology, holding a total of 13 patents. His innovative designs focus on improving the efficiency and ease of use of equipment in the construction and agricultural sectors.

Latest Patents

One of Shumaker's latest patents is a quick coupling and release mechanism for buckets. This invention allows for the easy attachment of a material handling bucket to a loader or backhoe. The mechanism features three spaced apart ends, including a first end connected to a push-pull link by a releasable pin, a second end pivotally mounted on the loader arm, and a third end that engages with a mounting pin on the bucket. This design enables a single operator to handle the coupling or uncoupling operation without the need for special tools.

Another significant patent is the optimized earthworking tool operating linkage. This arrangement mounts a hydraulic actuator to raise and lower a material handling element with minimal pivotal connections. The hydraulic actuator includes a cylinder and a piston, which enhances the lifting capability and speed of the material handling element. The design protects the piston rod from external damage and utilizes the inherent strength of the hydraulic actuator.

Career Highlights

John F. Shumaker is associated with J. I. Case Company, where he has applied his innovative ideas to develop practical solutions for material handling. His work has contributed to advancements in the efficiency and functionality of construction equipment.

Collaborations

Shumaker has collaborated with fellow inventor Herman J. Maurer, working together to enhance the capabilities of material handling technologies.

Conclusion

John F. Shumaker's contributions to material handling technology through his patents demonstrate his commitment to innovation and efficiency in the industry. His work continues to influence the design and functionality of equipment used in various sectors.

Profile summary based on public USPTO records.
Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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